Orders of magnitude (length)
The following are examples of orders of magnitude for different lengths.
Overview
Detailed list
To help compare different orders of magnitude, the following list describes various lengths between 1.6×10−35 meters and meters.
Subatomic
Factor (m) | Multiple | Value | Item |
---|---|---|---|
10−35 | 1 Planck length | 0.0000000000162 ym (1.62×10−35 m) | Planck length; typical scale of hypothetical loop quantum gravity or size of a hypothetical string and of branes; according to string theory lengths smaller than this do not make any physical sense.[1] Quantum foam is thought to exist at this level. |
10−24 | 1 yoctometre (ym) | 2 ym (2 × 10−24 metres) | Effective cross section radius of 1 MeV neutrinos[2] |
10−21 | 1 zeptometre (zm) | Preons, hypothetical particles proposed as subcomponents of quarks and leptons; the upper bound for the width of a cosmic string in string theory. | |
7 zm (7 × 10−21 metres) | Effective cross section radius of high energy neutrinos[3] | ||
310 zm (3.10 × 10−19 metres) | De Broglie wavelength of protons at the Large Hadron Collider (4 TeV as of 2012[update]) | ||
10−18 | 1 attometre (am) | Upper limit for the size of quarks and electrons | |
Sensitivity of the LIGO detector for gravitational waves[4] | |||
Upper bound of the typical size range for "fundamental strings"[1] | |||
10−17 | 10 am | Range of the weak force | |
10−16 | 100 am | 850 am | Approximate proton radius[5] |
Atomic to cellular
Factor (m) | Multiple | Value | Item
|
---|---|---|---|
10−15 | 1 femtometre (fm) | 1.5 fm | Size of an 11 MeV proton[6] |
2.81794 fm | Classical electron radius[7] | ||
1.75 to 15 fm | Diameter range of the atomic nucleus[1][8] | ||
10−12 | 1 picometre (pm) | 0.75 to 0.8225 pm | Longest wavelength of gamma rays |
1 pm | Distance between atomic nuclei in a white dwarf | ||
2.4 pm | Compton wavelength of electron | ||
5 pm | Wavelength of shortest X-rays | ||
10−11 | 10 pm | 25 pm | Radius of hydrogen atom |
31 pm | Radius of helium atom | ||
53 pm | Bohr radius | ||
10−10 | 100 pm | 100 pm (0.1 nm) | 1 Ångström (also covalent radius of sulfur atom[9]) |
154 pm (0.154 nm) | Length of a typical covalent bond (C–C). | ||
280 pm (0.28 nm) | Average size of the water molecule, actual lengths may vary. | ||
500 pm (0.50 nm) | Width of protein α helix | ||
10−9 | 1 nanometre (nm) | 1 nm | Diameter of a carbon nanotube[10] |
2 nm | Diameter of the DNA helix[11] | ||
2.5 nm | Smallest microprocessor transistor gate oxide thickness (as of January 2007[update]) | ||
3.4 nm | Length of a DNA turn (10 bp)[12] | ||
6–10 nm | Thickness of cell membrane | ||
10−8 | 10 nm | 10 nm | Thickness of cell wall in Gram-negative bacteria[citation needed] |
10 nm | As of 2016[update], the 10 nanometre was the smallest semiconductor device fabrication node[13] | ||
40 nm | Extreme ultraviolet wavelength | ||
50 nm | Flying height of the head of a hard disk.[14] | ||
10−7 | 100 nm | 121.6 nm | Wavelength of the Lyman-alpha line[15] |
120 nm | Typical diameter of the human immunodeficiency virus (HIV)[16] | ||
400–700 nm | Approximate wavelength range of visible light[17] |
Cellular to human scale
Factor (m) | Multiple | Value | Item
|
---|---|---|---|
10−6 | 1 micrometre (μm)
(also called one micron) |
1–4 μm | Typical length of a bacterium[18] |
4 μm | Typical diameter of spider silk[19] | ||
7 μm | Typical size of a red blood cell[20] | ||
10−5 | 10 μm | 10 μm | Typical size of a fog, mist or cloud water droplet |
10 μm | Width of transistors in the Intel 4004, the world's first commercial microprocessor | ||
12 μm | Width of acrylic fiber | ||
17-181 μm | Width range of human hair[21] | ||
10−4 | 100 μm | 340 μm | Size of a single pixel on a 17-inch monitor with a resolution of 1024×768 |
560 μm | Thickness of the central area of a human cornea[22] | ||
750 μm | Maximum diameter of Thiomargarita namibiensis, the largest bacterium ever discovered (as of 2010[update]) | ||
10−3 | 1 millimetre (mm) | 1.5 mm | Length of an average flea[23] |
2.54 mm | 1/10th inch; distance between pins in DIP (dual-inline-package) electronic components | ||
5.70 mm | Diameter of the projectile in 5.56×45mm NATO ammunition | ||
10−2 | 1 centimetre (cm) | 2 cm | Approximate width of an adult human finger |
5.4 cm x 8.6 cm | Dimensions of a credit card, according to the ISO/IEC 7810 ID-1 standard | ||
7.3–7.5 cm | Diameter of a baseball, according to Major League Baseball guidelines[24] | ||
10−1 | 1 decimetre (dm) | 1.2 dm = 12 cm | Diameter of a Compact Disk |
6.6 dm = 66 cm | Length of the longest pine cones, produced by the sugar pine[25] | ||
9 dm = 90 cm | Average length of a rapier, a fencing sword[26] |
Human to astronomical scale
Factor (m) | Multiple | Value | Item
|
---|---|---|---|
1 | 1 metre | 1 m (exactly) | Since 1983, defined as length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. See History of the metre for previous definitions. |
2.72 m | Height of Robert Wadlow, tallest known human being.[27] | ||
8.38 m | Length of a London bus (AEC Routemaster). | ||
101 | 1 decametre (dam) | 33 m | Length of the longest known blue whale.[28] |
52 m | Height of the Niagara Falls.[29] | ||
93.47 m | Height of the Statue of Liberty. | ||
102 | 1 hectometre (hm) | 105 m | Length of a typical football field. |
137 m (147 m) | Height (present and original) of the Great Pyramid of Giza. | ||
300 m | Height of the Eiffel Tower, one of the famous monuments of Paris. | ||
979 m | Height of the Salto Angel, the world's highest free-falling waterfall (Venezuela) | ||
103 | 1 kilometre (km) | 2.3 km | Axial length of the Three Gorges Dam, the largest dam in the world[30] |
3.1 km | Narrowest width of the Strait of Messina, separating Italy and Sicily. | ||
8.848 km | Height of Mount Everest, the highest mountain on Earth. | ||
104 | 10 km | 10.9 km | Depth of the Challenger Deep in the Mariana Trench, the deepest known point on Earth's surface. |
27 km | Circumference of the Large Hadron Collider, as of May 2010[update] the largest and highest energy particle accelerator. | ||
42.195 km | Length of a marathon. | ||
105 | 100 km | ||
100 km | The distance the IAU considers to be the limit to space, called the Karman line. | ||
163 km | Length of the Suez Canal, connecting the Mediterranean Sea to the Red Sea. | ||
491 km | Length of the Pyrenees, the mountain range separating Spain and France. | ||
974.6 km | Greatest diameter of the dwarf planet Ceres.[31] |
Astronomical
Factor (m) | Multiple | Value | Item |
---|---|---|---|
106 | 1,000 km = 1 megametre (Mm) | 2,390 km = 2.39 Mm | Diameter of dwarf planet Pluto, formerly the smallest planet category[note 2] in the Solar System |
3,480 km= 3.48 Mm | Diameter of the Moon | ||
5,200 km = 5.2 Mm | Typical distance covered by the winner of the 24 Hours of Le Mans automobile endurance race | ||
6,400 km = 6.4 Mm | Length of the Great Wall of China | ||
6,600 km = 6.6 Mm | Approximate length of the two longest rivers, the Nile and the Amazon | ||
7,821 km = 7.821 Mm | Length of the Trans-Canada Highway | ||
9,288 km = 9.288 Mm | Length of the Trans-Siberian Railway, longest in the world | ||
107 | 10,000 km | 12,756 km | Equatorial diameter of Earth |
40,075 km | Length of Earth's equator | ||
108 | 100,000 km | 142,984 km | Diameter of Jupiter |
299.792 km = 299 Mm | Distance traveled by light in one second | ||
384,000 km = 384 Mm | Moon's orbital distance from Earth | ||
109 | 1 million km = 1 gigametre (Gm) | 1,390,000 km = 1.39 Gm | Diameter of the Sun |
4,800,000 km = 4.8 Gm | Greatest mileage ever recorded by a car (3 million miles by a 1966 Volvo P-1800S, still driving) | ||
1010 | 10 million km | 18 million km | Approximately one light-minute |
1011 | 100 million km | 150 million km = 150 Gm | 1 astronomical unit (AU); mean distance between Earth and Sun |
~ 900 Gm | Optical diameter of Betelgeuse (~600 × Sun) | ||
1012 | 1 billion km = 1 terametre (Tm) | 1.4 ×109 km = 1.4 Tm | Orbital distance of Saturn from Sun |
1.96 ×109 km = 1.96 Tm | Estimated optical diameter of VY Canis Majoris (1420 × Sun) | ||
2.3 ×109 km = 2.3 Tm | Estimated optical diameter of NML Cygni (1650 × Sun) | ||
2.37 ×109 km = 2.37 Tm | Median point of the optical diameter of UY Scuti, as of 2016 the largest known star | ||
5.9 ×109 km = 5.9 Tm | Orbital distance of Pluto from Sun | ||
~ 7.5 ×109 km = 7.5 Tm | Outer boundary of the Kuiper belt, inner boundary of the Oort cloud (~ 50 AU) | ||
1013 | 10 Tm | Diameter of the Solar System as a whole[1] | |
16.25×109 km = 16.25 Tm | Distance of the Voyager 1 spacecraft from Sun (as of Feb 2009[update]), the farthest man-made object so far[32] | ||
62.03×109 km = 62.03 Tm | Estimated radius of the event horizon of the supermassive black hole in NGC 4889, the largest known black hole to date | ||
1014 | 100 Tm | 1.8×1011 km = 180 Tm | Size of the debris disk around the star 51 Pegasi [33] |
2×1011 km = 200 Tm | Total length of DNA molecules in all cells of an adult human body [34] | ||
1015 | 1 petametre (Pm) | ~ 7.5 ×1012 km = 7.5 Pm | Supposed outer boundary of the Oort cloud (~ 50,000 AU) |
9.46×1012 km = 9.46 Pm = 1 light year |
Distance traveled by light in one year; at its current speed, Voyager 1 would need 17,500 years to travel this distance | ||
1016 | 10 Pm | 3.2616 light-years (3.0857×1013 km = 30.857 Pm) |
1 parsec |
4.22 light-years = 39.9 Pm | Distance to nearest star (Proxima Centauri) | ||
4.37 light-years = 41.3 Pm | As of March 2013, distance to nearest discovered extrasolar planet (Alpha Centauri Bc) | ||
1017 | 100 Pm | 20.4 light-years = 193 Pm | As of October 2010, distance to nearest discovered extrasolar planet with potential to support life as we know it (Gliese 581 d) |
65 light-years = 6.15×1017 m = 615 Pm | Approximate radius of humanity's radio bubble, caused by high-power TV broadcasts leaking through the atmosphere into outer space | ||
1018 | 1 exametre (Em) | 200 light-years = 1.9 Em | Distance to nearby solar twin (HIP 56948), a star with properties virtually identical to our Sun [35] |
1019 | 10 Em | 1,000 light-years = 9.46 Em or 9.46 × 1015 km | Average thickness of Milky Way Galaxy[36] (1000 to 3000 ly by 21 cm observations[37]) |
1020 | 100 Em | 12,000 light-years = 113.5 Em or 1.135 × 1017 km | Thickness of Milky Way Galaxy's gaseous disk[38] |
950 Em | 100,000 light-years | Diameter of galactic disk of Milky Way Galaxy[1] | |
1021 | 1 zettametre (Zm) | ||
50 kiloparsecs | Distance to SN 1987A, the most recent naked eye supernova | ||
52 kiloparsecs = 1.62×1021 m = 1.62 Zm | Distance to the Large Magellanic Cloud (a dwarf galaxy orbiting the Milky Way) | ||
54 kiloparsecs = 1.66 Zm | Distance to the Small Magellanic Cloud (another dwarf galaxy orbiting the Milky Way) | ||
200 kiloparsecs = 6.15 Zm | Diameter of the low surface brightness disc halo of the giant spiral galaxy Malin 1 | ||
1022 | 10 Zm | 13.25 Zm = 1.4 million light years = 600 kiloparsecs |
Radius of the diffuse stellar halo of IC 1101, one of the largest known galaxies |
24 Zm = 2.5 million light-years = 770 kiloparsecs |
Distance to Andromeda Galaxy | ||
3.26 million light-years =30.8 Zm = 1 megaparsec |
1 megaparsec | ||
50 Zm (1.6 Mpc) | Diameter of Local Group of galaxies | ||
1023 | 100 Zm | 300–600 Zm = 10–20 megaparsecs | Distance to Virgo cluster of galaxies |
1024 | 1 yottametre (Ym) | 200 million light-years = 1.9 Ym = 61 megaparsecs |
Diameter of the Local Supercluster and the largest voids and filaments. |
300 million light-years = 2.8 Ym = 100 megaparsecs |
End of Greatness | ||
550 million light-years ~170 megaparsecs ~5 Ym |
Diameter of the Horologium Supercluster[39] | ||
1 billion light-years = 9.46 Ym =306 megaparsecs |
Diameter of the Pisces–Cetus Supercluster Complex, the supercluster complex where we live. | ||
1025 | 10 Ym | 1.37 billion light years = 1.3×1025 m = 13 Ym |
Length of the Sloan Great Wall, a giant wall of galaxies (galactic filament).[40] |
3.26 billion light years =30.8 Ym = 1 gigaparsec |
1 gigaparsec | ||
4 billion light years =37.84 Ym |
Length of the Huge-LQG, a group of 73 quasars | ||
1026 | 100 Ym | 1×1010 light-years = 9.5×1025 m = 95 Ym |
Estimated light travel distance to certain quasars. Length of the Hercules-Corona Borealis Great Wall, a colossal wall of galaxies, the largest and the most massive structure in the observable universe as of 2014. |
13.42 billion light years =1.27×1026 m = 127 Ym |
Estimated light travel distance to UDFj-39546284, the most distant object ever observed | ||
9.2×1010 light years = 8.7×1026 m = 870 Ym |
Approximate diameter (comoving distance) of the visible universe[1] | ||
1027 | 1000 Ym | 130 billion light years = 1.2×1027 m = 1200 Ym |
Lower bound of the (possibly infinite) radius of the universe, if it is a 3-sphere, according to one estimate using the WMAP data at 95% confidence.[41] It equivalently implies that there are at minimum 21 particle horizon-sized volumes in the universe. |
[note 3] | Ym | megaparsecs = m = Ym |
According to the laws of probability, the distance one must travel until one encounters a volume of space identical to our observable universe with conditions identical to our own.[42][43] |
[note 3] | Ym | Mpc = m = Ym |
Maximum size of universe after cosmological inflation, implied by one resolution of the No-Boundary Proposal[44] |
1 yoctometre
This Wikipedia series on orders of magnitude does not have a range of shorter distances
To help compare different orders of magnitude this section lists lengths shorter than 10−23 m (10 ym).
- 1.6 × 10−11 yoctometres (1.6 × 10−35 metres) – the Planck length (Measures of distance shorter than this are considered nonsensical and do not make any physical sense, according to current theories of physics).
- 1 ym – 1 yoctometre, the smallest named subdivision of the metre in the SI base unit of length, one septillionth of a metre.
- 1 ym – length of a neutrino.[citation needed]
10 yoctometres
To help compare different orders of magnitude this section lists lengths between 10−23 metres and 10−22 metres (10 ym and 100 ym).
- 20 ym – the effective cross-section radius of 1 MeV neutrinos as measured by Clyde Cowan and Frederick Reines[citation needed]
100 yoctometres
To help compare different orders of magnitude this section lists lengths between 10−22 m and 10−21 m (100 ym and 1 zm).
- 100 ym – length of a top quark, one of the smallest known quarks[citation needed]
1 zeptometre
To help compare different orders of magnitude this section lists lengths between 10−21 m and 10−20 m (1 zm and 10 zm).
- 2 zm – length of a preon, hypothetical particles proposed as subcomponents of quarks and leptons[citation needed]; the upper bound for the width of a cosmic string in string theory[citation needed].
- 2 zm – radius of effective cross section for a 20 GeV neutrino scattering off a nucleon[citation needed]
- 7 zm – radius of effective cross section for a 250 GeV neutrino scattering off a nucleon[citation needed]
10 zeptometres
To help compare different orders of magnitude this section lists lengths between 10−20 m and 10−19 m (10 zm and 100 zm).
- 15 zm – length of a high energy neutrino [citation needed]
- 30 zm – length of a bottom quark[citation needed]
100 zeptometres
To help compare different orders of magnitude this section lists lengths between 10−19 m and 10−18 m (100 zm and 1 am).
- 177 zm – de Broglie wavelength of protons at the Large Hadron Collider (7 TeV as of 2010)[citation needed]
1 attometre
To help compare different orders of magnitude this section lists lengths between 10−18 m and 10−17 m (1 am and 10 am).
- 1 am – sensitivity of the LIGO detector for gravitational waves[citation needed]
- 1 am – upper limit for the size of quarks and electrons[citation needed]
- 1 am – upper bound of the typical size range for "fundamental strings"[citation needed]
- 1 am – length of an electron[citation needed]
- 1 am – length of an up quark[citation needed]
- 1 am – length of a down quark[citation needed]
10 attometres
To help compare different orders of magnitude this section lists lengths between 10−17 m and 10−16 m (10 am and 100 am).
- 10 am – range of the weak force[citation needed]
100 attometres
To help compare different orders of magnitude this section lists lengths between 10−16 m and 10−15 m (100 am and 1 fm).
- 100 am – all lengths shorter than this distance are not conformed in terms of size[citation needed]
- 850 am – approximate proton radius[citation needed]
1 femtometre
The femtometre (symbol fm) is a unit of length in the metric system, equal to 10−15 metres. In particle physics, this unit is more commonly called a fermi, also with abbreviation "fm". To help compare different orders of magnitude this section lists lengths between 10−15 metres and 10−14 metres (1 femtometre (fm) and 10 fm).
- 1 fm – length of a proton[citation needed]
- 1 fm – length of a neutron[citation needed]
- 1.5 fm – diameter of the scattering cross section of an 11 MeV proton with a target proton[citation needed]
- 2.81794 fm – classical electron radius
- 7 fm – the radius of the effective scattering cross section for a gold nucleus scattering a 6 MeV alpha particle over 140 degrees[citation needed]
10 femtometres
To help compare different orders of magnitude this section lists lengths between 10−14 m and 10−13 m (10 fm and 100 fm).
- 1.75 to 15 fm – Diameter range of the atomic nucleus
100 femtometres
To help compare different orders of magnitude, this section lists lengths between 10−13 m and 10−12 m (100 fm and 1 pm).
1 picometre
To help compare different orders of magnitude this section lists lengths between 10−12 and 10−11 m (1 pm and 10 pm).
- 1 pm – distance between atomic nuclei in a white dwarf[citation needed]
- 2.4 pm – The Compton wavelength of the electron.
- 5 pm – shorter X-ray wavelengths (approx.)
10 picometres
To help compare different orders of magnitude this section lists lengths between 10−11 and 10−10 m (10 pm and 100 pm).
- 25 pm – radius of a helium atom
- 50 pm – radius of a hydrogen atom
- 50 pm – radius of an oxygen atom
- 50 pm – bohr radius
- ~50 pm – best resolution of a high-resolution transmission electron microscope
- 60 pm – radius of a carbon atom
- 93 pm – length of a dicarbon molecule
100 picometres
To help compare different orders of magnitude this section lists lengths between 10−10 and 10−9 m (100 pm and 1 nm).
- 100 pm – 1 Ångström
- 100 pm – covalent radius of sulfur atom
- 120 pm – van der Waals radius of a neutral hydrogen atom
- 120 pm – radius of a gold atom
- 126 pm – covalent radius of ruthenium atom
- 135 pm – covalent radius of technetium atom
- 150 pm – Length of a typical covalent bond (C–C)
- 153 pm – covalent radius of silver atom
- 155 pm – covalent radius of zirconium atom
- 175 pm – covalent radius of thulium atom
- 200 pm – highest resolution of a typical electron microscope
- 225 pm – covalent radius of caesium atom
- 280 pm – Average size of the water molecule
- 298 pm – radius of a caesium atom, the largest known atom.
- 340 pm – thickness of single layer graphene
- 356.68 pm – width of diamond cell (unit cell)
- 403 pm – width of lithium fluoride cell
- 500 pm – Width of protein α helix
- 543 pm – silicon lattice spacing
- 560 pm – width of sodium chloride cell
- 700 pm – width of glucose molecule
- 780 pm – mean width of quartz cell
- 820 pm – mean width of ice cell
- 900 pm – mean width of coesite cell
- 1000 pm – length of a Buckyball
1 nanometre
To help compare different orders of magnitude this section lists lengths between 10−9 and 10−8 m (1 nm and 10 nm).
- 1 nm –10 Ångströms
- 1 nm – side of square with area of 1 nm2
- 1 nm – edge of cube with volume 1 nm3
- 1 nm – diameter of a carbon nanotube
- 1 nm – roughly the length of a sucrose molecule, calculated by Albert Einstein
- 2.3 nm – length of a phospholipid
- 2.3 nm – Smallest microprocessor transistor gate oxide thickness
- 3 nm – width of a DNA helix
- 3 nm – flying height of the head of a hard disk
- 3.4 nm – length of a DNA turn (10 bp)
- 3.8 nm – size of an albumin protein molecule
- 5 nm – size of the gate length of a 16 nm processor
- 6 nm – length of a phospholipid bilayer
- 6-10 nm – thickness of cell membrane
- 6.8 nm – width of a haemoglobin molecule
- 10 nm Thickness of cell wall in Gram-negative bacteria
10 nanometres
To help compare different orders of magnitude this section lists lengths between 10−8 and 10−7 m (10 nm and 100 nm).
- 10 nm – 100 angstrom
- 10 nm – side of square of area 10−16 m2
- 10 nm – edge of cube of area 6 * 10−16 m2 and volume 10−24 m3
- 10 nm – radius of circle of area 3.14 * 10−16 m2
- 10 nm – radius of sphere of area 12.56 * 10−16 m2 and volume 4.19 * 10−24 m3
- 10 nm – the average length of a nanowire
- 10 nm – lower size of tobacco smoke[45]
- 11 nm – the average half-pitch of a memory cell speculated to be manufactured in 2015.
- 13 nm – the length of the wavelength that is used for EUV lithography
- 14 nm – Length of a porcine circovirus
- 15 nm – Length of an antibody
- 16 nm – technology is projected to be reached by semiconductor companies in the 2013 timeframe
- 18 nm – diameter of tobacco mosaic virus[46] (Generally, viruses range in size from 20 nm to 450 nm.)[citation needed]
- 20 nm – Length of a nanobe, could be one of the smallest forms of life
- 20 nm to 80 nm – thickness of cell wall in Gram-positive bacteria[47]
- 20 nm – thickness of bacterial flagellum
- 22 nm – the average half-pitch of a memory cell expected to be manufactured at around the 2011–2011 time frame.
- 22 nm – Smallest feature size of production microprocessors in September 2009[48]
- 30 nm – lower size of cooking oil smoke
- 32 nm – the average half-pitch of a memory cell manufactured at around the 2009–2010 time frame.
- 40 nm – extreme ultraviolet wavelength
- 45 nm – the average half-pitch of a memory cell manufactured at around the 2007–2008 time frame.
- 50 nm – upper size for airborne virus particles
- 50 nm – flying height of the head of a hard disk[49]
- 65 nm – the average half-pitch of a memory cell manufactured at around the 2005–2006 time frame.
- 58 nm – height of a T7 bacteriophage
- 90 nm – Length of a HIV virus
- 90 nm – Human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm)
- 90 nm – the average half-pitch of a memory cell manufactured at around the 2002–2003 time frame.
- 100 nm – Length of a Mesoporous silica.
100 nanometres
To help compare different orders of magnitude this section lists lengths between 10−7 and 10−6 m (100 nm and 1 μm).
- 100 nm – greatest particle size that can fit through a surgical mask[51]
- 100 nm – 90% of particles in wood smoke are smaller than this.[citation needed]
- 120 nm – greatest particle size that can fit through a ULPA filter[citation needed]
- 120 nm – diameter of a human immunodeficiency virus (HIV) [52]
- 125 nm – standard depth of pits on compact discs (width: 500 nm, length: 850 nm to 3.5 μm)
- 180 nm – typical length of the rabies virus
- 200 nm – typical size of a Mycoplasma bacterium, among the smallest bacteria
- 300–400 nm – near ultraviolet wavelength
- 300 nm – greatest particle size that can fit through a HEPA (High Efficiency Particulate Air) filter (N100 removes up to 99.97% at 0.3 micrometres, N95 removes up to 95% at 0.3 micrometres)[citation needed]
- 400–420 nm – wavelength of violet light (see color and visible spectrum)
- 420–440 nm – wavelength of indigo light (see color and visible spectrum)
- 440–500 nm – wavelength of blue light (see color and visible spectrum)
- 500–520 nm – wavelength of cyan light (see color and visible spectrum)
- 520–565 nm – wavelength of green light (see color and visible spectrum)
- 565–590 nm – wavelength of yellow light (see color and visible spectrum)
- 590–625 nm – wavelength of orange light (see color and visible spectrum)
- 625–700 nm – wavelength of red light (see color and visible spectrum)
- 700–1.4 μm – wavelength of near-infrared radiation
1 micrometre
To help compare different orders of magnitude this section lists some items with lengths between 10−6 and 10−5 m (between 1 and 10 micrometres, or μm).
- ~0.7–300 μm – wavelength of infrared radiation
- 1 μm – the side of square of area 10−12 m2
- 1 μm – edge of cube of volume 10−18 m3 (1 fL)
- 1–10 μm – diameter of a typical bacterium[citation needed]
- 1 μm – length of a lysosome
- 2 μm – length of an average E. coli bacteria
- 3–4 μm – size of a typical yeast cell[53]
- 5 μm – length of a typical human spermatozoon's head [54]
- 6 μm – anthrax spore[citation needed]
- 7 μm – diameter of the nucleus of a typical eukaryotic cell[citation needed]
- about 7 μm – diameter of human red blood cells [55]
- 3–8 μm – width of strand of spider web silk[56]
- 8 μm – width of a chloroplast[citation needed]
- 9 μm – thickness of the tape in a 120-minute compact cassette.[citation needed]
- about 10 μm – size of a fog, mist or cloud water droplet[citation needed]
10 micrometres
To help compare different orders of magnitude, this section lists lengths between 10−5 m and 10−4 m (10 μm and 100 μm).
- 10 μm – width of cotton fibre[57]
- 10 μm – transistor width of the Intel 4004, the world's first commercial microprocessor
- 10 μm – mean longest dimension of a human red blood cell[citation needed]
- 5–20 μm – dust mite excreta[58]
- 10.6 μm – wavelength of light emitted by a carbon dioxide laser
- 15 μm – width of silk fibre[citation needed]
- 17 μm – minimum width of a strand of human hair[21]
- 17.6 μm – one twip, a unit of length in typography
- 10 to 55 μm – width of wool fibre[57]
- 25.4 μm – 1/1000 inch, commonly referred to as 1 mil in the U.S. and 1 thou in the UK
- 30 μm – length of a human skin cell
- 50 μm – typical length of Euglena gracilis, a flagellate protist[citation needed]
- 50 μm – typical length of a human liver cell, an average-sized body cell[citation needed]
- 50 μm – length of a silt particle
- 60 μm – length of a sperm cell
- 70 to 180 μm – thickness of paper
100 micrometres
To help compare different orders of magnitude, this section lists lengths between 10−4 m and 10−3 m (100 μm and 1 mm). The term Myriometre (equivalent to 100 micrometers) is deprecated; the decimal metric prefix myrio-[59] is obsolete[60][61][62] and not included among the prefixes when the International System of Units was introduced in 1960.
- 100 μm – 1/10 of a millimetre
- 100 μm – 0.00394 inches
- 100 μm – smallest distance that can be seen with the naked eye
- 100 μm – average diameter of a strand of human hair[21]
- 100 μm – thickness of a coat of paint
- 100 μm – length of a dust particle
- 120 μm – the geometric mean of the Planck length and the diameter of the observable universe: √8.8 × 1026 m × 1.6 × 10−35 m
- 120 μm – diameter of a human ovum
- 170 μm – length of the largest sperm cell in nature, belonging to the Drosophila bifurca fruit fly[63][64]
- 181 μm – maximum width of a strand of human hair[21]
- 100–400 μm – length of Demodex mites living in human hair follicles
- 200 μm – typical length of Paramecium caudatum, a ciliate protist
- 250–300 μm – length of a dust mite[65]
- 340 μm – length of a single pixel on a 17-inch monitor with a resolution of 1024×768
- 500 μm – typical length of Amoeba proteus, an amoeboid protist
- 500 μm – MEMS micro-engine[citation needed]
- 500 μm – average length of a grain of sand
- 500 μm – average length of a grain of salt
- 500 μm – average length of a grain of sugar
- 560 μm – thickness of the central area of a human cornea[66]
- 750 μm – diameter of a Thiomargarita namibiensis, the largest bacteria known[67]
- 760 μm – thickness of an identification card
1 millimetre
To help compare different orders of magnitude this section lists lengths between 10−3 m and 10−2 m (1 mm and 1 cm).
- 1.0 mm – 1/1000 of a metre
- 1.0 mm – 0.03937 inches or 5/127 (exactly)
- 1.0 mm – side of square of area 1 mm²
- 1.0 mm – diameter of a pinhead
- 1.5 mm – length of average flea[23]
- 2.54 mm – distance between pins on old DIP (dual-inline-package) electronic components
- 5 mm – length of an average red ant
- 5 mm – diameter of an average grain of rice
- 5.56×45mm NATO – standard ammunition size
- 6 mm – approximate width of a pencil
- 7 mm – length of a Paedophryne amauensis, the smallest known vertebrate[68]
- 7.1 mm – length of a sunflower seed
- 7.62×51mm NATO – common military ammunition size[69]
- 8 mm – width of old-format home movie film
- 8 mm – length of a Paedocypris progenetica, the smallest known fish[70]
1 centimetre
To help compare different orders of magnitude this section lists lengths between 10−2 m and 10−1 m (1 cm and 10 cm).
- 1 cm – 10 millimeters
- 1 cm – 0.39 inches
- 1 cm – edge of square of area 1 cm2
- 1 cm – edge of cube of volume 1 ml
- 1 cm – length of a coffee bean
- 1 cm – approximate width of average fingernail
- 1.2 cm – length of a bee
- 1.2 cm – diameter of a dice
- 1.5 cm – length of a very large mosquito
- 1.6 cm – length of a Jaragua Sphaero, a very small reptile
- 1.7 cm – length of a Thorius arboreus, the smallest Salamander[71]
- 2 cm – approximate width of an adult human finger
- 2.54 cm – 1 inch
- 3.1 cm – 1 attoparsec (10−18 parsecs)
- 3.4 cm – length of a quail egg[72]
- 3.5 cm – width of film commonly used in motion pictures and still photography
- 4.3 cm – minimum diameter of a golf ball[73]
- 5 cm – usual diameter of a chicken egg
- 5 cm – height of a Hummingbird, the smallest known bird
- 5.5 × 5.5 × 5.5 cm – dimensions of a 3x3x3 Rubik's Cube
- 6.1 cm – average height of an apple
- 7.3–7.5 cm – diameter of a baseball[24]
- 8.6 cm × 5.4 cm – dimensions of a standard credit card[74]
- 9 cm – length of a Speckled Padloper, the smallest known turtle
1 decimetre
To help compare different orders of magnitude this section lists lengths between 10 centimetres and 100 centimetres (10−1 metre and 1 metre).
Conversions
10 centimetres (abbreviated to 10 cm) is equal to:
- 1 decimetre (dm), a term not in common use
- 100 millimetres
- 3.9 inches
- a side of a square of area 0.01 m2
- the edge of a cube with a volume of 1×10−3 (one litre)
Wavelengths
- 10 cm = 1.0 dm – wavelength of the highest UHF radio frequency, 3 GHz
- 12 cm = 1.2 dm – wavelength of the 2.45 GHz ISM radio band
- 21 cm = 2.1 dm – wavelength of the 1.4 GHz hydrogen emission line, a hyperfine transition of the hydrogen atom
- 100 cm = 10 dm – wavelength of the lowest UHF radio frequency, 300 MHz
Human-defined scales and structures
- 10.16 cm = 1.016 dm – 1 hand used in measuring height of horses (4 inches)
- 12 cm = 1.2 dm – diameter of a Compact Disc (CD) (= 120 mm)
- 15 cm = 1.5 dm – length of a Bic pen with cap on
- 22 cm = 2.2 dm – diameter of a typical Association football (soccer ball)
- 30 cm = 3 dm – typical school-use ruler length (= 300 mm)
- 30.48 cm = 3.048 dm – 1 foot (measure)
- 60 cm = 6 dm – standard depth (front to back) of a domestic kitchen worktop in Europe (= 600 mm)
- 90 cm = 9 dm – average length of a rapier, a fencing sword[26]
- 91.44 cm = 9.144 dm – one yard (measure)
Nature
- 10 cm = 1 dm – diameter of the human cervix upon entering the second stage of labour[citation needed]
- 11 cm = 1.1 dm – diameter of an average potato
- 15 cm = 1.5 dm – approximate size of largest beetle species[citation needed]
- 19 cm = 1.9 dm – length of a banana
- 29 cm = 2.9 dm – length of average human foot[citation needed]
- 29.98 cm = 2.998 dm – distance light travels in one nanosecond
- 31 cm = 3.1 dm – wingspan of largest butterfly species Ornithoptera alexandrae[citation needed]
- 46 cm = 4.6 dm – length of an average domestic cat
- 50 to 65 cm = 5–6.5 dm – a pizote's tail[citation needed]
- 66 cm = 6.6 dm – length of the longest pine cones (produced by the sugar pine[75])
Astronomical
1 metre
To help compare different orders of magnitude this section lists lengths between one metre and ten metres. Light travels 1 metre in 1⁄299,792,458, or 3.3356409519815E-9 of a second.
Conversions
1 metre is:
- 10 decimetres
- 100 centimetres
- 1,000 millimetres
- 39.37 inches
- 3.28 feet
- side of square with area 1 m2
- edge of cube with surface area 6 m2 and volume 1 m3
- radius of circle with area 3.14 m2
- radius of sphere with surface area 12.56 m2 and volume 4.19 m3
Human-defined scales and structures
- 1 m – approximate height of the top part of a doorknob on a door
- 1 m – diameter of a very large beach ball
- 1.435 m – standard gauge of railway track used by about 60% of railways in the world = 4' 8½"
- 2.5 m – distance from the floor to the celling in an average residential house[76]
- 2.7 m – length of the Starr Bumble Bee II, the smallest plane
- 2.77–3.44 m – wavelength of the broadcast radio FM band 87–108 MHz
- 3.05 m – the length of an old Mini
- 8.38 m – the length of a London Bus (Routemaster)
Sports
- 2.44 m – height of an association football goal[77]
- 2.45 m – highest high jump by a human being (Javier Sotomayor)[78]
- 3.05 m – (10 feet) height of the basket in basketball
- 8.95 m – longest long jump by a human being (Mike Powell)[79]
Nature
- 1 m – height of Homo floresiensis (the "Hobbit")
- 1.15 m – a pizote (mammal)
- 1.37 m – average height of an Andamanese person
- 1.63 m – (5 feet 4 inches) (or 64 inches) - height of average US female human as of 2002[update] (source: US Centers for Disease Control and Prevention (CDC)).
- 1.75 m – (5 feet 8 inches) - height of average US male human as of 2002[update] (source: US CDC as per female above)
- 2.5 m – height of a sunflower
- 2.72 m – (8 feet 11 inches) - tallest known human being (Robert Wadlow)[27]
- 3.63 m – the record wingspan for living birds (a wandering albatross)
- 5 m – length of an elephant
- 5.20 m – height of a giraffe[80]
- 5.5 m – height of a Baluchitherium, the largest land mammal ever lived
- 7 m – wingspan of Argentavis, the largest flying bird known
- 7.50 m – approximate length of the human gastrointestinal tract
Astronomical
- 3–6 m – approximate diameter of 2003 SQ222, a meteoroid
- 4.1 m – diameter of 2008 TC3, a small asteroid that flew into the Earth's atmosphere on October 7, 2008.[81]
1 decametre
To help compare different orders of magnitude this section lists lengths between 10 metres and 100 metres.
Conversions
10 metres (very rarely termed a decametre which is abbreviated as dam) is equal to:
- 10 metres
- 100 decimetres
- 1,000 centimetres
- 10,000 millimetres
- 32.8 feet
- side of square with area 100 m²
Human-defined scales and structures
- 10 metres – wavelength of the highest shortwave radio frequency, 30 MHz
- 23 metres – height of the obelisk of the Place de la Concorde, Paris, France.
- 25 metres – wavelength of the broadcast radio shortwave band at 12 MHz
- 29 metres – height of the lighthouse at Savudrija, Slovenia.
- 31 metres – wavelength of the broadcast radio shortwave band at 9.7 MHz
- 34 metres – height of the Split Point Lighthouse in Aireys Inlet, Victoria, Australia.
- 40 metres – average depth beneath the seabed of the Channel tunnel
- 49 metres – wavelength of the broadcast radio shortwave band at 6.1 MHz
- 50 meters – length of a road train
- 55 metres – height of the Leaning Tower of Pisa
- 60 metres – height of Pyramid of Djoser[citation needed]
- 64 metres – wingspan of a Boeing 747-400
- 69 meters – wingspan of a Antonov An-124 Ruslan
- 70 metres – length of the Bayeux Tapestry
- 70 metres – width of a typical football field
- 77 meters – wingspan of a Boeing 747-8
- 88.40 metres – wingspan of the Antonov An-225 Mriya transport aircraft
- 93 meters – height of the Statue of Liberty
- 96 meters – height of Big Ben
- 100 metres – wavelength of the lowest shortwave radio frequency, 3 MHz
Sports
- 11 metres – approximate width of a doubles tennis court
- 15 metres – width of a standard FIBA basketball court
- 15.24 metres – width of an NBA basketball court (50 feet)
- 18.44 metres – distance between the front of the pitcher's rubber and the rear point of home plate on a baseball field (60 feet, 6 inches)[82]
- 20 metres – length of cricket pitch (22 yards)[83]
- 27.43 metres – distance between bases on a baseball field (90 feet)
- 28 metres – length of a standard FIBA basketball court
- 28.65 metres – length of an NBA basketball court (94 feet)
- 49 metres – width of an American football field (53⅓ yards)
- 59.436 metres – width of a Canadian football field (65 yards)
- 70 metres – typical width of soccer field
- 91 metres – length of American football field (100 yards, measured between the goal lines)
- 105 metres – length of football pitch (UEFA Stadium Category 3 and 4)
Nature
- 10 metres – average length of human digestive tract[citation needed]
- 12 metres – length of a whale shark, largest living fish
- 12 metres – wingspan of a Quetzalcoatlus, a pterosaur
- 13 metres – length of a giant squid and colossal squid, the largest living invertebrates
- 15 metres – approximate distance the tropical circles of latitude are moving towards the equator and the polar circles are moving towards the poles each year due to a natural, gradual decrease in the Earth's axial tilt
- 18 metres – height of a Sauroposeidon, the tallest known dinosaur
- 20 metres – length of a Leedsichthys, the largest known fish ever lived
- 21 metres – height of High Force waterfall in England
- 33 metres – length of a blue whale,[84] the largest animal on earth, living or extinct, in terms of mass
- 35 metres – length of a Supersaurus, the longest known dinosaur and longest vertebrate[citation needed]
- 40 metres – average depth beneath the seabed of the Channel tunnel[citation needed]
- 52 metres – height of Niagara Falls[29]
- 83.34 meters – height of a Western hemlock
Astronomical
- 30 metres – diameter of 1998 KY26, a rapidly spinning meteoroid
- 32 meters – approximate diameter of 2008 HJ, a small meteoroid
1 hectometre
To compare different orders of magnitude this section lists lengths between 100 metres and 1000 metres (1 kilometre).
Conversions
100 metres (sometimes termed a hectometre) is equal to:
- 328 feet
- one side of a 1 hectare square
- a fifth of a modern li, a Chinese unit of measurement
- the approximate distance travelled by light in 300 nanoseconds
Human-defined scales and structures
- 100 metres – wavelength of the highest mediumwave radio frequency, 3 MHz
- 100 metres – spacing of location marker posts on British motorways
- 138.8 metres – height of the Great Pyramid of Giza (Pyramid of Cheops)
- 139 metres – height of the world's tallest roller coaster, Kingda Ka[86]
- 187 metres– shortest wavelength of the broadcast radio AM band, 1600 kHz
- 202 metres – length of the Széchenyi Chain Bridge connecting Buda and Pest
- 318 meters – height of The New York Times Building
- 318.9 meters – height of the Chrysler Building
- 320.75 metres – height of the Eiffel Tower(including antenna) [87]
- 328 metres – height of Auckland's Sky Tower, the tallest free-standing structure in the Southern Hemisphere[when?]
- 341 metres – height of the world's tallest bridge, the Millau Viaduct[when?]
- 390 metres – height of the Empire State Building
- 400–800 metres – approximate heights of the world's tallest skyscrapers of the past 80 years[when?]
- 458 metres – length of the Knock Nevis, the world's largest supertanker
- 553.33 meters – height of the CN Tower[88]
- 555 metres – longest wavelength of the broadcast radio AM band, 540 kHz
- 630 metres – height of the KVLY-TV mast, second tallest structure in the world
- 646 metres – height of the Warsaw radio mast, the world's tallest structure until its collapse in 1991
- 828 metres – height of Burj Khalifa, world's tallest structure on 17 January 2009[89]
- 1,000 metres – wavelength of the lowest mediumwave radio frequency, 300 kHz
Sports
- 100 metres – the distance a very fast human being can run in about 10 seconds
- 100.584 metres – length of a Canadian football field between the goal lines (110 yards)
- 91.5 metres – 137 metres – length of a soccer field[90]
- 105 metres – length of a typical football field
- 109.73 metres – total length of an American football field (120 yards, including the end zones)
- 110 – 150 metres the width of an Australian football field
- 135 – 185 metres the length of an Australian football field
- 137.16 metres – total length of a Canadian football field, including the end zones (150 yards)
Nature
- 115.5 metres – height of the world's tallest tree in 2007, the Hyperion sequoia[91]
- 310 metres – maximum depth of Lake Geneva
- 340 metres – distance sound travels in air at sea level in one second; see speed of sound
- 979 metres – height of the Salto Angel, the world's highest free-falling waterfall (Venezuela)
Astronomical
- 270 metres – length of 99942 Apophis
- 535 metres – length of 25143 Itokawa,[92] a small asteroid visited by a spacecraft
1 kilometre
To help compare different orders of magnitude this section lists lengths between 1 kilometre and 10 kilometres (103 and 104 metres).
Conversions
1 kilometre (unit symbol km) is equal to:
- 1,000 metres
- 0.621371 miles
- 1,093.61 yards
- 3,280.84 feet
- 39,370.1 inches
- 100,000 centimetres
- 1,000,000 millimetres
- Side of a square of area 1 km2.
- Radius of a circle of area π km2.
Human-defined scales and structures
- 1 km – wavelength of the highest long wave radio frequency, 300 kHz[93]
- 1.280 km – span of the Golden Gate Bridge (distance between towers)[94]
- 1.609 km – 1 mile
- 1.852 km – 1 nautical mile, equal to 1 arc minute of latitude at the surface of the earth[95]
- 1.991 km – span of the Akashi Kaikyō Bridge[96]
- 2.309 km – axial length of the Three Gorges Dam, the largest dam in the world[30]
- 3.991 km – length of the Akashi Kaikyō Bridge, longest suspension bridge in the world as of December 2008[update][97]
- 5.072 km – height of Tanggula Mountain Pass, below highest peak in the Tanggula Mountains, highest railway pass in the world as of August 2005[update][98]
- 5.727 km – height of Cerro Aucanquilcha, highest road in the world, located in Chile[99][failed verification]
- 98 airports have paved runways from 4 km to 5.5 km in length.
- 8 km – length of Palm Jebel Ali, an artificial island built off the coast of Dubai
- 9.8 km – length of The World, an artificial archipelago that is also built off the coast of Dubai, whose islands resemble a world map
Geographical
This section needs additional citations for verification. (March 2011) |
- 1.637 km – deepest dive of Lake Baikal in Russia, the world's largest fresh water lake.[100]
- 2.228 km – height of Mount Kosciuszko, highest point in Australia[101]
- Most of Manhattan is from 3 to 4 km wide.
- 4.810 km – height of Mont Blanc, highest peak in the Alps
- 4.884 km – height of Carstensz Pyramid, highest peak in Oceania[102]
- 4.892 km – height of Mount Vinson, highest peak in Antarctica
- 5.610 km – height of Mount Damavand, highest peak in Iran
- 5.642 km – height of Mount Elbrus, highest peak in Europe
- 5.895 km – height of Mount Kilimanjaro, highest peak in Africa
- 6.081 km – height of Mount Logan, highest peak in Canada
- 6.194 km – height of Denali, highest peak in North America
- 6.959 km – height of Aconcagua, highest peak in South America
- 7.5 km – depth of Cayman Trench, deepest point in the Caribbean Sea
- 8.848 km – height of Mount Everest, highest peak on Earth, on the border between Nepal and China
Astronomical
- 1 km – diameter of 1620 Geographos
- 1 km – very approximate size of the smallest known moons of Jupiter
- 1.4 km – diameter of Dactyl, the first confirmed asteroid moon
- 4.8 km – diameter of 5535 Annefrank, an inner belt asteroid
- 5 km – diameter of 3753 Cruithne, one of the smallest asteroids
- 5 km – length of PSR B1257+12
- 8 km – diameter of Themisto, one of Jupiter's moons
- 8 km – diameter of the Vela Pulsar
- 8.6 km – diameter of Callirrhoe, also known as Jupiter XVII
- 9.737 km – length of PSR B1919+21
10 kilometres
To help compare different orders of magnitude this section lists lengths between 10 and 100 kilometres (104 to 105 metres). The myriametre[103] (sometimes also spelled myriameter, myriometre and myriometer) (10,000 metres) is a deprecated unit name; the decimal metric prefix myria-[59] (sometimes also written as myrio-[104][105][106]) is obsolete[60][61][62] and not included among the prefixes when the International System of Units was introduced in 1960.
Conversions
10 kilometres is equal to:
- 10,000 metres
- 6.2 miles
- 1 mil (the Scandinavian mile), now standardized as 10 km:
- farsang, unit of measure commonly used in Iran and Turkey.[108]
Sports
Human-defined scales and structures
- 18 km – cruising altitude of Concorde
- 27 km – circumference of the Large Hadron Collider, as of May 2010[update] the largest and highest energy particle accelerator
- 34.668 km – highest manned balloon flight (Malcolm D. Ross and Victor E. Prather on 4 May 1961) [110]
- 38.422 km – length of the Second Lake Pontchartrain Causeway in Louisiana, US
- 39 km – undersea portion of the Channel tunnel
- 53.9 km – length of the Seikan Tunnel, as of October 2009[update], the longest rail tunnel in the world[111]
- 77 km – Rough total length of the Panama Canal[112]
Geographical
- 10 km – height of Mauna Kea in Hawaii, measured from its base on the ocean floor
- 11 km – deepest known point of the ocean, Challenger Deep in the Mariana Trench
- 11 km – average height of the troposphere
- 14 km – width of the Gibraltar strait
- 21 km – length of Manhattan
- 23 km – depth of the largest earthquake ever recorded in the United Kingdom, in 1931 at the Dogger Bank of the North Sea
- 34 km – narrowest width of the English Channel at the Strait of Dover
- 50 km – approximate height of the stratosphere
- 90 km – width of the Bering Strait
Astronomical
- 10 km – diameter of the most massive neutron stars (3–5 solar masses)
- 13 km – mean diameter of Deimos, the smaller moon of Mars
- 20 km – diameter of the least massive neutron stars (1.44 solar masses)
- 20 km – diameter of Leda, one of Jupiter's moons
- 20 km – diameter of Pan, one of Saturn's moons
- 22 km – diameter of Phobos, the larger moon of Mars
- 27 km – height of Olympus Mons above the Mars reference level,[113][114] the highest known mountain of the Solar System
- 43 km – diameter difference of Earth's equatorial bulge
- 66 km – diameter of Naiad, the innermost of Neptune's moons
100 kilometres
A length of 100 kilometres (about 62 miles), as a rough amount, is relatively common in measurements on Earth and for some astronomical objects. It is the altitude at which the FAI defines spaceflight to begin. To help compare orders of magnitude, this section lists lengths between 100 and 1,000 kilometres (105 and 106 metres).
Conversions
A distance of 100 kilometres is equal to about 62 miles (or 62.13711922 miles).
Human-defined scales and structures
- 100 km — the Karman line: the official boundary of outer space
- 105 km — distance from Giridih to Bokaro
- 109 km — length of High Speed 1 between London and the Channel Tunnel[115]
- 130 km — range of a Scud-A missile
- 163 km — length of the Suez Canal
- 164 km — length of the Danyang–Kunshan Grand Bridge
- 213 km — length of Paris Métro
- 217 km — length of the Grand Union Canal
- 223 km — length of the Madrid Metro
- 300 km — range of a Scud-B missile
- 386 km — altitude of the International Space Station
- 408 km — length of the London Underground (active track)
- 460 km — distance from London to Paris
- 470 km — distance from Dublin to London as the crow flies
- 600 km — range of a Scud-C missile
- 600 km — height above ground of the Hubble Space Telescope
- 804.67 km — (500 miles) distance of the Indy 500 automobile race
Geographical
- 111 km — distance covered by one degree of latitude on Earth's surface
- 180 km — distance between Mumbai and Nashik
- 203 km — length of Sognefjorden, the third largest fjord in the world
- 220 km — distance between Pune and Nashik
- 240 km — widest width of the English Channel
- 430 km — length of the Pyrenees
- 500 km — widest width of Sweden from east to west
- 550 km — distance from San Francisco to Los Angeles as the crow flies
- 560 km — distance of Bordeaux–Paris, formerly[when?] the longest one-day professional cycling race[116]
- 590 km — length of land boundary between Finland and Sweden
- 724 km — length of the Om River
- 871 km — distance from Sydney to Melbourne (along the Hume Highway)
- 897 km — length of the River Douro
- 900 km — distance from Berlin to Stockholm
- 956 km - distance from Washington, DC to Chicago, Illinois as the crow flies
Astronomical
- 100 km — the altitude at which the FAI defines spaceflight to begin
- 167 km — diameter of Amalthea, one of Jupiter's inner moons
- 200 km — width of Valles Marineris
- 220 km — diameter of Phoebe, the largest of Saturn's outer moons
- 300 km — the approximate distance travelled by light in one millisecond
- 340 km — diameter of Nereid, the third largest moon of Neptune
- 350 km — lower bound of Low Earth orbit
- 420 km — diameter of Proteus, the second largest moon of Neptune
- 468 km — diameter of the asteroid 4 Vesta
- 472 km — diameter of Miranda, one of Uranus' major moons
- 974.6 km — greatest diameter of 1 Ceres,[117] the largest solar system asteroid[note 2]
1 megametre
To help compare different orders of magnitude this section lists lengths starting at 106 m (1 Mm or 1,000 km).
Conversions
1 megametre is equal to:
- 1 E+6 m (one million metres)
- approximately 621.37 miles
- Side of square with area 1,000,000 km2
Human-defined scales and structures
- 1.000 Mm – Length of 1 megameter
- 2.100 Mm – Length of proposed gas pipeline from Iran to India via Pakistan
- 2.100 Mm – Distance from Casablanca to Rome
- 2.288 Mm – Length of the official Alaska Highway when it was built in the 1940s[118]
- 3.069 Mm – Length of Interstate 95 (from Houlton, Maine to Miami, Florida)
- 3.846 Mm – Length of U.S. Route 1 (from Fort Kent, Maine to Key West, Florida)
- 5.000 Mm – Width of the United States
- 5.007 Mm – Estimated length of Interstate 90 (Seattle, Washington to Boston, Massachusetts)
- 5.614 Mm – Length of the Australian Dingo Fence[119]
- 6.4 Mm – Length of the Great Wall of China
- 7.821 Mm – Length of the Trans-Canada Highway, the world's longest national highway (from Victoria, British Columbia to St. John's, Newfoundland)
- 8.836 Mm – Road distance between Prudhoe Bay, Alaska, and Key West, Florida, the endpoints of the U.S. road network
- 8.852 Mm – Aggregate length of the Great Wall of China, including trenches, hills and rivers[120]
- 9.259 Mm – Length of the Trans-Siberian railway[121]
Sports
- The Munda Biddi Trail in WA, Australia is over 1000 km long - the world's longest off-road cycle trail
- 1.200 Mm – the length of the Paris–Brest–Paris bicycling event
- Several endurance auto races are, or were, run for 1,000 km:
Geographical
- 1.010 Mm – Distance from San Diego to El Paso as the crow flies
- 2.000 Mm – Distance from Beijing to Hong Kong as the crow flies
- 2.800 Mm – Narrowest width of Atlantic Ocean (Brazil-West Africa)
- 2.850 Mm – Length of the Danube river
- 2.205 Mm – Length of Sweden's total land boundaries
- 2.515 Mm – Length of Norway's total land boundaries
- 3.690 Mm – Length of the Volga river, longest in Europe
- 4.350 Mm – Length of the Yellow River
- 4.800 Mm – Widest width of Atlantic Ocean (U.S.-Northern Africa)
- 5.100 Mm – Distance from Dublin to New York as the crow flies
- 6.270 Mm – Length of the Mississippi-Missouri River system
- 6.380 Mm – Length of the Yangtze River
- 6.400 Mm – Length of the Amazon River
- 6.758 Mm – Length of the Nile system, longest on Earth
- 8.200 Mm – Distance from Dublin to San Francisco as the crow flies
Astronomical
- 1.000 Mm – Estimated shortest axis of triaxial dwarf planet Haumea
- 1.186 Mm – Diameter of Charon, the largest moon of Pluto
- 1.280 Mm – Diameter of the trans-Neptunian object 50000 Quaoar
- 1.436 Mm – Diameter of Iapetus, one of Saturn's major moons
- 1.578 Mm – Diameter of Titania, the largest of Uranus' moons
- 1.960 Mm – Estimated longest axis of Haumea
- 2.326 Mm – Diameter of the dwarf planet Eris, the largest trans-Neptunian object found to date
- 2.374 Mm – Diameter of Pluto
- 2.707 Mm – Diameter of Triton, largest moon of Neptune
- 3.122 Mm – Diameter of Europa, the smallest Galilean satellite of Jupiter
- 3.476 Mm – Diameter of Earth's Moon
- 3.643 Mm – Diameter of Io, a moon of Jupiter
- 4.821 Mm – Diameter of Callisto, a moon of Jupiter
- 4.879 Mm – Diameter of Mercury
- 5.150 Mm – Diameter of Titan, the largest moon of Saturn
- 5.262 Mm – Diameter of Jupiter's moon Ganymede, the largest moon in the solar system
- 6.366 Mm – Radius of Earth
- 6.792 Mm – Diameter of Mars
10 megametres
This section needs additional citations for verification. (April 2007) |
To help compare different orders of magnitude, this section lists lengths starting at 107 metres (10 megametres or 10,000 kilometres).
Conversions
10 megametres (10 Mm) is
- 6,215 miles.
- side of a square of area 100,000,000 square kilometres (km2)
- radius of a circle of area 314,159,265 km2
Human-defined scales and structures
- 11.085 Mm – Length of the Kiev-Vladivostok railway, a longer variant of the Trans-Siberian railway[122]
- 13.300 Mm – Length of roads being rehabilitated and widened under the National Highway Development Project (launched in 1998) in India
- 39.000 Mm – Length of the SEA-ME-WE 3 optical submarine telecommunications cable, joining 39 points between Norden, Germany and Okinawa, Japan
- 67.000 Mm – Total length of National Highways in India
Geographical
- 10 Mm – Approximate altitude of the outer boundary of the exosphere
- 10.001 Mm – Length of the meridian arc from the North Pole to the Equator (the original definition of the metre was based on this length).
- 60.000 Mm – Total length of the mid-ocean ridges
Astronomical
- 12.000 Mm – Diameter of Sirius B, a white dwarf[123]
- 12.104 Mm – Diameter of Venus
- 12.742 Mm – Diameter of Earth
- 12.900 Mm – Minimum distance of the meteoroid 2004 FU162 from the center of Earth on 31 March 2004, closest on record
- 14.000 Mm – Smallest diameter of Jupiter's Great Red Spot
- 19.000 Mm – Separation between Pluto and Charon
- 34.770 Mm – Minimum distance of the asteroid 99942 Apophis on 13 April 2029 from the center of Earth
- 35.786 Mm – Altitude of geostationary orbit
- 40.005 Mm – Polar circumference of the Earth
- 40.077 Mm – Equatorial circumference of the Earth
- 49.528 Mm – Diameter of Neptune
- 51.118 Mm – Diameter of Uranus
100 megametres
To help compare different orders of magnitude, this section lists lengths starting at 108 metres (100 megametres or 100,000 kilometres or 62,150 miles).
- 102 Mm – Diameter of HD 149026 b, an unusually dense Jovian planet
- 111.191 Mm – 20,000 (nautical, British) leagues (see Jules Verne, Twenty Thousand Leagues Under the Sea)
- 115 Mm – Width of Saturn's Rings
- 174 Mm – Diameter of 2MASS J0528-1403, the smallest known star
- 120 Mm – Diameter of Saturn
- 142 Mm – Diameter of Jupiter, the largest planet in the solar system
- 170 Mm – Diameter of TRAPPIST-1, a star recently discovered to have 7 planets around it
- 174 Mm – Diameter of OGLE-TR-122b
- 180 Mm – Average distance covered during life
- 196 Mm – Diameter of Proxima Centauri, a typical red dwarf
- 242 Mm – Diameter of WASP-12b
- 250 Mm – Diameter of TrES-4
- 299.792 Mm – One light second; the distance light travels in vacuum in one second (see speed of light)
- 300 Mm – Diameter of WASP-17b
- 307 Mm – Diameter of CT Cha b
- 384.4 Mm (238,855 mi) – Average Earth-Moon distance[124]
- 671 Mm – Separation between Jupiter and Europa
- 964 Mm – Diameter of HD 100546 b, the largest known planet
1 gigametre
To help compare different distances this section lists lengths starting at 109 metres (1 gigametre (Gm) or 1 billion metres).
- 1.2 Gm – Separation between Saturn and Titan
- 1.39 Gm – Diameter of Sun[125]
- 1.5 Gm – (proposed) Expected orbit from Earth of the James Webb Space Telescope
- 2.19 Gm – Closest approach of Comet Lexell to Earth, happened on 1 July 1770; closest comet approach on record
- 3 Gm – Total length of "wiring" in the human brain.[126]
- 4.2 Gm – Diameter of Algol B
- 5.0 Gm – Closest approach of Comet Halley to Earth, happened on 10 April 837
- 5.0 Gm – (proposed) Size of the arms of the giant triangle shaped Michelson interferometer of the Laser Interferometer Space Antenna (LISA) planned to start observations in or around 2015.
- 7.9 Gm – Diameter of Gamma Orionis
- 9.0 Gm – Estimated diameter of the event horizon of Sagittarius A*, the supermassive black hole in the center of the Milky Way galaxy
10 gigametres
To help compare different distances this section lists lengths starting at 1010 metres (10 gigametres (Gm) or 10 million kilometres, or 0.07 Astronomical units).
- 15 Gm – Closest distance of Comet Hyakutake from Earth
- 18 Gm – One light-minute (see yellow sphere in right-hand diagram)
- 24 Gm – Radius of a heliostationary orbit
- 46 Gm – Perihelion distance of Mercury (yellow ellipse on the right)
- 55 Gm – 60,000-year perigee of Mars (last achieved on 27 August 2003)
- 55 Gm - Radius of Rigel, a blue supergiant star (largest star on right)[127]
- 58 Gm – Average passing distance between Earth and Mars at the moment they overtake each other in their orbits
- 61 Gm[128][129] – Diameter of Aldebaran, an orange giant star (large star on right)
- 70 Gm – Aphelion distance of Mercury
- 76 Gm – Neso's apocentric distance; greatest distance of a natural satellite from its parent planet (Neptune)
100 gigametres
To help compare distances at different orders of magnitude this section lists lengths starting at 1011 metres (100 Gm or 100 million kilometres or 0.7 astronomical units).
- 109 Gm – 0.7 AU – Distance between Venus and the Sun
- 149.6 Gm (93.0 million mi) – 1.0 AU – Distance between the Earth and the Sun - the definition of the astronomical unit
- 180 Gm – 1.2 AU – Maximum diameter of Sagittarius A*, the supermassive black hole in the center of Milky Way galaxy
- 228 Gm – 1.5 AU – Distance between Mars and the Sun
- 570 Gm – 3.8 AU – Length of the tail of Comet Hyakutake measured by Ulysses; the actual value could be much higher
- 591 Gm – 4.0 AU – Minimum distance between the Earth and Jupiter
- 780 Gm – 5.2 AU – Distance between Jupiter and the Sun
- 965 Gm – 6.4 AU – Maximum distance between the Earth and Jupiter
1 terametre
To help compare different distances, this section lists lengths starting at 1012 m (1 Tm or 1 billion km or 6.7 astronomical units).
- 1.079 Tm – 7.2 AU – One light-hour
- 1.23 Tm – 8.2 AU – Diameter of Antares
- 1.4 Tm – 9.5 AU – Distance between Saturn and the Sun
- 1.98 Tm – 13.2 AU – Revised estimated diameter of VY Canis Majoris. The newly improved measurement was 30% lower than the previous 2007 estimate.[130]
- 2.0 Tm – 13.4 AU – Diameter of one of the largest known stars, KY Cygni
- 2.4 Tm – 15.9 AU – Estimated diameter of UY Scuti, the largest known star as of 2013
- 2.9 Tm – 19.4 AU – Previous estimated diameter of VY Canis Majoris, as of 2007.[131] The size was revised in 2012 through improved measurement techniques. (see above)[130]
- 2.9 Tm – 19.4 AU – Distance between Uranus and the Sun
- 4.4 Tm – 29.4 AU – Perihelion distance of Pluto
- 4.5 Tm – 30.1 AU – Distance between Neptune and the Sun
- 4.5 Tm – 30.1 AU – Inner radius of the Kuiper belt
- 5.7 Tm – 38.1 AU – Perihelion distance of Eris
- 7.3 Tm – 48.8 AU – Aphelion distance of Pluto
- 7.5 Tm – 50.1 AU – Outer radius of the Kuiper Belt, inner boundary of the Oort Cloud
10 terametres
To help compare different distances this section lists lengths starting at 1013 m (10 Tm or 10 billion km or 67 astronomical units).
- 11.1 Tm – 74.2 AU – Distance that Voyager 1 began detecting returning particles from termination shock
- 11.4 Tm – 76.2 AU – Perihelion distance of 90377 Sedna
- 12.1 Tm – 70 to 90 AU – Distance to termination shock (Voyager 1 crossed at 94 AU)
- 12.9 Tm – 86.3 AU – Distance to 90377 Sedna in March 2014
- 13.2 Tm – 88.6 AU – Distance to Pioneer 11 in March 2014
- 14.1 Tm – 94.3 AU – Estimated radius of the solar system
- 14.4 Tm – 96.4 AU – Distance to Eris in March 2014 (now near its aphelion)
- 15.1 Tm – 101 AU – Distance to heliosheath
- 16.5 Tm – 111 AU – Distance to Pioneer 10 as of March 2014
- 16.6 Tm - 111.2AU - Distance to Voyager 2 as of May 2016
- 20.0 Tm - 135 AU - Distance to Voyager 1 as of May 2016
- 20.6 Tm – 138 AU - Distance to Voyager 1 as of late February 2017
- 21.1 Tm – 138 AU - Distance to Voyager 1 as of November 2017
- 25.9 Tm – 172 AU – One light-day
- 55.7 Tm – 371 AU – Aphelion distance of the comet Hale-Bopp
100 terametres
To help compare different distances this section lists lengths starting at 1014 m (100 Tm or 100,000 million km or 670 astronomical units).
- 146 Tm – 975 AU – Aphelion distance of 90377 Sedna
- 172 Tm – 1150 AU – Schwarzschild diameter of H1821+643, one of the most massive black holes known
- 181 Tm – 1210 AU – One light-week
- 653 Tm – 4367 AU – Aphelion distance of comet Hyakutake (current orbit)[132]
- 757 Tm – 5059 AU – radius of the Stingray Nebula[133]
- 777 Tm – 5180 AU – One light-month
1 petametre
To help compare different distances this section lists lengths starting at 1015 m (1 Pm or 1,000,000 million km or 6685 astronomical units (AU) or 0.11 light years).
- 1.0 Pm = 0.105702341 light years [134]
- 1.9 Pm ± .5 Pm = 12,000 AU = 0.2 light year radius of Cat's Eye Nebula's inner core[135]
- 4.7 Pm = 30,000 AU = half light year diameter of Bok globule Barnard 68[136]
- 7.5 Pm – 50,000 AU – Possible outer boundary of Oort cloud (other estimates are 75,000 to 125,000 or even 189,000 AU (1.6, 2, and 3 light years, respectively))
- 7.7 Pm – 52,000 AU – Aphelion distance of the Great Daylight Comet of 1910
- 9.5 Pm – 63,241.1 AU – One light year, the distance travelled by light in one year
10 petametres
To help compare different distances this section lists lengths starting at 1016 m (10 Pm or 66,800 AU, 1.06 light years).
- 15 Pm – 1.59 light years – Possible outer radius of Oort cloud
- 20 Pm – 2.11 light years – maximum extent of influence of the Sun's gravitational field[citation needed]
- 30.9 Pm – 3.26 light years – 1 parsec
- 39.9 Pm – 4.22 light years – Distance to Proxima Centauri (nearest star to Sun)
- 81.3 Pm – 8.59 light years – Distance to Sirius
100 petametres
To help compare different distances this section lists lengths between 1017 m (100 Pm or 11 light years) and 1018 m (106 light years).
- 110 Pm – 12 light years – Distance to Tau Ceti
- 230 Pm – 24 light years – Diameter of the Orion Nebula[137][138]
- 240 Pm – 25 light years – Distance to Vega
- 260 Pm – 27 light years – Distance to Chara, a star approximately as bright as our Sun. Its faintness gives us an idea how our Sun would appear when viewed from even so close a distance as this.
- 350 Pm – 37 light years – Distance to Arcturus
- 373.1 Pm – 39.44 light years - Distance to TRAPPIST-1, a star recently discovered to have 7 planets around it.
- 400 Pm – 42 light years – Distance to Capella
- 620 Pm – 65 light years – Distance to Aldebaran
- 750 Pm - 79.36 light years - Distance to Regulus
- 900 Pm - 92.73 light years - Distance to Algol
1 exametre
This list includes distances between 1 and 10 exametres (1018 m). To help compare different distances this section lists lengths between 1018 m (1 Em or 105.7 light years) and 1019 m (1057 light years).
- 1.2 Em – 129 light years – Diameter of Messier 13 (a typical globular cluster)
- 1.6 Em – 172 ± 12.5 light years – Diameter of Omega Centauri (one of the largest known globular clusters, perhaps containing over a million stars)[139][140]
- 3.1 Em – 310 light years – Distance to Canopus according to Hipparcos[141]
- 5.7 Em – 600 light years – Diameter of the Tarantula Nebula[citation needed]
- 6.1 Em – 640 light years – Distance to Betelgeuse according to Hipparcos[142]
- 6.2 Em – 650 light years – Distance to the Helix Nebula, located in the constellation Aquarius[143]
- 7.3 Em – 730 light years – Distance to Rigel according to Hipparcos[141]
10 exametres
To help compare different orders of magnitude, this section lists distances starting at 10 Em (1019 m or 1,100 light years).
- 13 Em – 1,300 light years – Distance to the Orion Nebula[144]
- 14 Em – 1,500 light years – Approximate thickness of the plane of the Milky Way galaxy at the Sun's location
- 14.2 Em – 1,520 light years – Diameter of the NGC 604
- 30.8568 Em – 3,261.6 light years – 1 kiloparsec
- 31 Em – 3,200 light years – Distance to Deneb according to Hipparcos
- 46 Em – 4,900 light years – Distance to OGLE-TR-56, the first extrasolar planet discovered using the transit method
- 47 Em – 5,000 light years – Distance to the Boomerang nebula, coldest place known (1 K)
- 53 Em – 5,600 light years – Distance to the globular cluster M4 and the extrasolar planet PSR B1620-26 b within it
- 61 Em – 6,500 light years – Distance to Perseus Spiral Arm (next spiral arm out in the Milky Way galaxy)
- 71 Em – 7,500 light years – Distance to Eta Carinae
100 exametres
To help compare different orders of magnitude, this section lists distances starting at 100 Em (1020 m or 11,000 light years).
- 150 Em – 16,000 light years – Diameter of the Small Magellanic Cloud, a dwarf galaxy orbiting the Milky Way
- 200 Em – 21,500 light years – Distance to OGLE-2005-BLG-390Lb, the most distant and the most Earth-like planet known
- 240 Em – 25,000 light years – Distance to the Canis Major Dwarf Galaxy
- 260 Em – 28,000 light years – Distance to the center of the Galaxy
- 830 Em – 88,000 light years – Distance to the Sagittarius Dwarf Elliptical Galaxy
- >950 Em – >100,000 light years – Diameter of the disc of the Milky Way Galaxy
1 zettametre
The zettametre (SI symbol: Zm) is a unit of length in the metric system equal to 1021 metres.[145]
To help compare different orders of magnitude, this section lists distances starting at 1 Zm (1021 m or 110,000 light years).
- 1.7 Zm – 179,000 light years – Distance to the Large Magellanic Cloud, largest satellite galaxy of the Milky Way
- 2.0 Zm – 210,000 light years – Distance to the Small Magellanic Cloud
- 2.8 Zm – 300,000 light years – Distance to the Intergalactic Wanderer, one of the most distant globular clusters of Milky Way
- 8.5 Zm – 900,000 light years – Distance to the Leo I Dwarf Galaxy, farthest known Milky Way satellite galaxy
10 zettametres
To help compare different orders of magnitude, this section lists distances starting at 10 Zm (1022 m or 1.1 million light years).
- 24 Zm – 2.5 million light years – Distance to the Andromeda Galaxy[146]
- 30.8568 Zm – 3.2616 million light years – 1 megaparsec
- 40 Zm – 4.2 million light years – Distance to the IC 10, a distant member of the Local Group of galaxies
- 49.2 Zm – 5.2 million light years – Width of the Local Group of galaxies
- 57 Zm – 6 million light years – Diameter of the supergiant elliptical galaxy IC 1101
- 95 Zm – 10 million light years – Distance to the Sculptor Galaxy in the Sculptor Group of galaxies
- 95 Zm – 10 million light years – Distance to the Maffei 1, the nearest giant elliptical galaxy in the Maffei 1 Group
100 zettametres
To help compare different orders of magnitude, this section lists distances starting at 100 Zm (1023 m or 11 million light years).
- 140 Zm – 15 million light years – Distance to Centaurus A galaxy
- 250 Zm – 27 million light years – Distance to the Pinwheel Galaxy
- 280 Zm – 30 million light years – Distance to the Sombrero Galaxy
- 570 Zm – 60 million light years – Approximate distance to the Virgo cluster, nearest galaxy cluster
- 620 Zm – 65 million light years – Approximate distance to the Fornax cluster
- 800 Zm – 85 million light years – Approximate distance to the Eridanus cluster
1 yottametre
The yottametre or yottameter in the US ( SI symbol: Ym) is a unit of length in the metric system equal to 1024 metres[145]
To help compare different orders of magnitude, this section lists distances starting at 1 Ym (1024 m or 105.702 million light years).
- 1.2 Ym – 127 million light years – Distance to the closest observed gamma ray burst GRB 980425
- 1.3 Ym – 137 million light years – Distance to the Centaurus Cluster of galaxies, the nearest large supercluster
- 1.9 Ym – 201 million light years – Diameter of the Local Supercluster
- 2.3 Ym – 225 to 250 million light years – Distance light travels in vacuum in one galactic year
- 2.8 Ym – 296 million light years – Distance to the Coma Cluster
- 3.2 Ym – 338 million light years – Distance to the Stephan's Quintet
- 4.7 Ym – 496 million light years – Length of the CfA2 Great Wall, one of the largest observed superstructures in the Universe
- 6.1 Ym – 645 million light years – Distance to the Shapley Supercluster
- 9.5 Ym – 996 million light years – Diameter of the Eridanus Supervoid
10 yottametres
To help compare different orders of magnitude, this section lists distances starting at 10 Ym (1025 m or 1.1 billion light-years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depends on the cosmological models used.
- 13.7 Ym – 1.37 billion light-years – Length of the Sloan Great Wall
- 18 Ym – redshift 0.16 – 1.9 billion light-years – Distance to the quasar 3C 273 (light travel distance)
- 33 Ym – 3.5 billion light-years – Maximum distance of the 2dF Galaxy Redshift Survey (light travel distance)
- 37.8 Ym – 4 billion light-years – Length of the Huge-LQG
- 75 Ym – redshift 0.95 – 8 billion light-years – Approximate distance to the supernova SN 2002dd in the Hubble Deep Field North (light travel distance)
- 85 Ym – redshift 1.6 – 9 billion light-years – Approximate distance to the gamma ray burst GRB 990123 (light travel distance)
- 94.6 Ym – 10 billion light-years – Approximate distance to quasar OQ172
- 94.6 Ym – 10 billion light-years – Length of the Hercules-Corona Borealis Great Wall, one of the largest and most massive known cosmic structure.
100 yottametres
To help compare different orders of magnitude, this section lists distances starting at 100 Ym (1026 m or 11 billion light years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depend on the cosmological models used.
Distances longer than 100 Ym
- 130 Ym – redshift 6.41 – 13 billion light years – Light travel distance (LTD) to the quasar SDSS J1148+5251
- 130 Ym – redshift 1000 – 13.8 billion light years – Distance (LTD) to the source of the cosmic microwave background radiation; radius of the observable universe measured as a LTD
- 260 Ym – 27.4 billion light years – Diameter of the observable universe (double LTD)
- 440 Ym – 46 billion light years – Radius of the universe measured as a comoving distance.
- 590 Ym – 62 billion light years – Cosmological event horizon: the largest comoving distance from which light will ever reach us (the observer) at any time in the future
- 886.48 Ym – 93.7 billion light years – The diameter of the observable universe; however, there might be unobserved distances that are even greater.
- >1,000 Ym (1 kYm or xennameter in older usage) – Size of universe beyond the cosmic light horizon, depending on its curvature; if the curvature is zero (i.e. the universe is spatially flat), the value can be infinite (see shape of the universe) as previously mentioned
Notes
- ^ According to The Physics Factbook, the diameter of human hair ranges from 17 to 181 μm. Ley, Brian (1999). "Width of a Human Hair". The Physics Factbook.
- ^ a b The exact category (asteroid, dwarf planet or planet) to which particular Solar System objects belong, has been subject to some revision since the discovery of extrasolar planets and trans-Neptunian objects
- ^ a b 10115 is 1 followed by 115 zeroes, or a googol multiplied by a quadrillion. 1010115 is 1 followed by a quadrillion googol zeroes. 101010122is 1 followed by 1010122 (a googolplex10 sextillion) zeroes.
See also
References
- ^ a b c d e f Cliff Burgess; Fernando Quevedo (November 2007). "The Great Cosmic Roller-Coaster Ride". Scientific American (print). Scientific American, Inc. p. 55. Retrieved 1 May 2017.
- ^ Carl R. Nave. "Cowan and Reines Neutrino Experiment". Retrieved 4 December 2008. (6.3 × 10−44 cm2, which gives an effective radius of about 2 × 10−24 m)
- ^ gravitational waves that originate tens of millions of light years from Earth are expected to distort the 4 kilometre mirror spacing by about 10−18 m, less than one-thousandth the charge diameter of a proton. Equivalently, this is a relative change in distance of approximately one part in 1021. "On 14 September 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10−21." B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration), "Observation of Gravitational Waves from a Binary Black Hole Merger", Phys. Rev. Lett. 116, 061102, published 11 February 2016.
- ^ Randolf Pohl; Aldo Antognini; François Nez; Fernando D. Amaro; François Biraben; João M. R. Cardoso; Daniel S. Covita; Andreas Dax; Satish Dhawan; Luis M. P. Fernandes; Adolf Giesen; Thomas Graf; Theodor W. Hänsch; Paul Indelicato; Lucile Julien; Cheng-Yang Kao; Paul Knowles; Eric-Olivier Le Bigot; Yi-Wei Liu; José A. M. Lopes; Livia Ludhova; Cristina M. B. Monteiro; Françoise Mulhauser; Tobias Nebel; Paul Rabinowitz; et al. (8 July 2010). "The size of the proton". Nature. 466 (7303): 213–216. Bibcode:2010Natur.466..213P. doi:10.1038/nature09250. PMID 20613837. Retrieved 9 July 2010.
- ^ NIST. CODATA Value: classical electron radius. Retrieved 10 February 2009.
- ^ H. E. Smith. "The Scale of the Universe". UCSD. Retrieved 10 February 2009.
~10−13cm
- ^ Mark Winter (2008). "WebElements Periodic Table of the Elements / Sulfur / Radii". Retrieved 6 December 2008.
- ^ Flahaut, E.; Bacsa R; Peigney A; Laurent C. (2003). "Gram-Scale CCVD Synthesis of Double-Walled Carbon Nanotubes". Chemical Communications. 12 (12): 1442–1443. doi:10.1039/b301514a. PMID 12841282. Retrieved 14 November 2008.
- ^ Stewart, Robert. "Dr". Radiobiology Software. Archived from the original on 30 June 2010. Retrieved 20 May 2015.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ Dominique Langevin. "Chapter 10: DNA-Surfactant/Lipid Complexes at Liquid Interfaces". In Rita S Dias and Bjorn Lindman (ed.). DNA Interactions with Polymers and Surfactants. Hoboken, NJ: John Wiley & Sons, Inc. p. 265. ISBN 978-0-470-25818-7. Retrieved 24 May 2014.
DNA has 20 elementary charges per helical turn over the corresponding length of 3.4nm
[dead link ] - ^ [1]
- ^ "Hard drive basics – Capacities, RPM speeds, interfaces and mechanics". helpwithpcs.com. Retrieved 13 July 2016.
- ^ Cohn, J. University of California, Berkeley Lyman alpha systems and cosmology. Retrieved 21 February 2009.
- ^ Seth, S.D.; Seth, Vimlesh (2009). Textbook of Pharmacology (3rd ed.). Elsevier. p. X111. ISBN 978-81-312-1158-8. Retrieved 19 July 2016.
- ^ Color
- ^ "Size of bacteria". What are bacteria?. Retrieved 19 July 2016.
- ^ "Engineering properties of spider silk" (PDF). web.mit.edu. Retrieved 19 July 2016.
- ^ Doohan, Jim. "Blood cells". biosbcc.net. Archived from the original on 23 July 2016. Retrieved 19 July 2016.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ a b c d According to The Physics Factbook, the diameter of human hair ranges from 17 to 181 μm. Ley, Brian (1999). "Width of a Human Hair". The Physics Factbook.
- ^ Liu, Z; Huang, AJ; Pflugfelder, SC (July 1999). "Evaluation of corneal thickness and topography in normal eyes using the Orbscan corneal topography system". Br J Ophthalmol. 83 (7): 774–8. doi:10.1136/bjo.83.7.774. PMC 1723104. PMID 10381661.
- ^ a b Order Siphonaptera – Fleas – BugGuide.Net Accessed 29 April 2014
- ^ a b "Official Rules". MLB. Retrieved 30 September 2011.
- ^ "Pinus lambertiana". Retrieved 19 January 2017.
{{cite web}}
: Unknown parameter|authors=
ignored (help) - ^ a b "What is a rapier - Renaissance swords Rapiers". 2-Clicks Swords.
- ^ a b "Tallest Man". Guinness World Records. Archived from the original on 5 June 2011. Retrieved 10 June 2010.
{{cite web}}
: Italic or bold markup not allowed in:|publisher=
(help); Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Animal Records". Smithsonian National Zoological Park. Retrieved 29 May 2007.
- ^ a b "Niagara Falls Geology Facts & Figures". Niagara Parks Commission. Archived from the original on 19 July 2011. Retrieved 29 June 2011.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ a b "Three Gorges Dam". encyclopedia.com. Cengage Learning.
- ^ Thomas, P. C.; Parker, J. Wm.; McFadden, L. A.; et al. (2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–226. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID 16148926.
- ^ Spacecraft escaping the Solar System Archived 9 March 2011 at WebCite
- ^ Twin Keck telescopes probe dual dust disks
- ^ "medical science - Length of uncoiled human DNA - Skeptics Stack Exchange". Retrieved 13 March 2015.
- ^ Shiga, David. "Sun's 'twin' an ideal hunting ground for alien life". New Scientist. Retrieved 3 October 2007.
- ^ Christian, Eric; Samar, Safi-Harb. "How large is the Milky Way?". Retrieved 14 November 2008.
- ^ Duncan, Martin (2008). "16". Physics 216 – Introduction to Astrophysics (PDF). Archived from the original (PDF) on 17 December 2008. Retrieved 14 November 2008.
{{cite book}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Milky Way fatter than first thought". The Sydney Morning Herald. Australian Associated Press. 20 February 2008. Archived from the original on 28 April 2008. Retrieved 14 November 2008.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ http://www.atlasoftheuniverse.com/superc/hor.html The Horologium Supercluster
- ^ J. R. Gott III et al., Astrophys. J., 624, 463 (2005). Figure 8 – "Logarithmic Maps of the Universe" – is available as a poster from the homepage of Mario Juric. Archived 24 January 2009 at the Wayback Machine
- ^ https://arxiv.org/abs/astro-ph/0605709v2 How Many Universes Do There Need To Be?
- ^ "Parallel universes. Not just a staple of science fiction, other universes are a direct implication of cosmological observations.", Tegmark M., Sci Am. 2003 May;288(5):40-51.
- ^ Max Tegmark (2003). "Parallel Universes". In "Science and Ultimate Reality: from Quantum to Cosmos", honoring John Wheeler's 90th birthday. J. D. Barrow, P.C.W. Davies, & C.L. Harper eds. Cambridge University Press (2003). 288: 40–51. arXiv:astro-ph/0302131. Bibcode:2003astro.ph..2131T. doi:10.1038/scientificamerican0503-40. PMID 12701329.
- ^ https://arxiv.org/abs/hep-th/0610199 "Susskind's Challenge to the Hartle-Hawking No-Boundary Proposal and Possible Resolutions "
- ^ Annis, Patty J. October 1991. Kansas State University. Fine Particle POLLUTION. Figure 1. (tobacco smoke: 10 to 1000 nm; virus particles: 3 to 50 nm; bacteria: 30 to 30000 nm; cooking oil smoke: 30 to 30000 nm; wood smoke: 7 to 3000 nm)
- ^ Stryer, Lubert (1988). Biochemistry. San Francisco: W.H. Freeman. ISBN 0-7167-1843-X.
- ^ Microbiology Text.com
- ^ http://www.physorg.com/news172852816.html accessed 2009.09.21
- ^ help with PCs web site
- ^ Graham T. Smith (2002). Industrial metrology. Springer. p. 253. ISBN 978-1-85233-507-6.
- ^ Electrospray versus Nebulization for Aerosolization and Filter Testing with Bacteriophage Particles. In-Depth Article. Retrieved 15 September 2010. Aerosol Science and Technology, Volume 43, Issue 4 April 2009, pages 298 - 304.
- ^ Textbook Of Pharmacology by SD Seth
- ^ Walker K, Skelton H, Smith K (2002). "Cutaneous lesions showing giant yeast forms of Blastomyces dermatitidis". Journal of Cutaneous Pathology. 29 (10): 616–618. doi:10.1034/j.1600-0560.2002.291009.x. PMID 12453301.
- ^ Smith, D.J. (2009). "Human sperm accumulation near surfaces: a simulation study" (PDF). Journal of Fluid Mechanics. 621: 295. Bibcode:2009JFM...621..289S. doi:10.1017/S0022112008004953. Retrieved 20 May 2012.
- ^ DNA From The Beginning, section 6: Genes are real things., "Amination" section, final slide
- ^ Gordon Ramel. "Spider Silk". Archived from the original on 4 December 2008. Retrieved 4 December 2008.
garden spider silk has a diameter of about 0.003 mm ... Dragline silk (about .00032 inch (.008 mm) in Nephila)
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ a b IST - Innovative Sintering Technologies Ltd. "Fibreshape applications". Retrieved 4 December 2008.
Histogram of cotton thickness
- ^ Morton Lippmann (2000). Environmental Toxicants: Human Exposures and Their Health Effects. John Wiley and Sons. p. 453. ISBN 0-471-29298-2. Retrieved 4 December 2008.
20 μm .. 5 μm
- ^ a b "La Loi Du 18 Germinal An 3 - Décision de tracer le mètre, unité fondamentale, sur une règle de platine. Nomenclature des "mesures républicaines". Reprise de la triangulation" (in French). histoire.du.metre.free.fr. Retrieved 12 October 2015.
- ^ a b Comité International des Poids et Mesures (1935). "Procès-Verbaux des Séances" (in French). 17 (2 ed.). Paris, France: Gauthier-Villars, imprimeur-libraire du Bureau des Longitudes, de l'École Polytechnique: 76.
{{cite journal}}
: Cite journal requires|journal=
(help) - ^ a b Roberts, Richard W. (1 June 1975). Metric System of Weights and Measures - Guidelines for Use. USA: Director of the National Bureau of Standards. Federal Register FR Doc.75-15798 (1975-06-18).
Accordingly, the following units and terms listed in the table of metric units in section 2 of the act of 28 July 1866, that legalized the metric system of weights and measures in the United States, are no longer accepted for use in the United States: myriameter, stere, millier or tonneau, quintal, myriagram, kilo (for kilogram).
- ^ a b Judson, Lewis V. (1 October 1976) [1963]. "Appendix 7". In Barbrow, Louis E. (ed.). Weights and Measures Standards of the United States, a brief history (PDF). Derived from a prior work by Louis A. Fisher (1905). USA: US Department of Commerce, National Bureau of Standards. p. 33. LCCN 76-600055. NBS Special Publication 447; NIST SP 447; 003-003-01654-3. Retrieved 12 October 2015.
- ^ Kim Popiolek. "Dr. Charles Lindemann's Lab: Sperm Facts". Oakland University.
- ^ Santoso, Alex (17 June 2006). "World's Biggest Sperm Belongs to a Tiny Fly". Neatorama.
- ^ House Dust Mites HYG-2157-97. Retrieved 2008-12-04
- ^ "Evaluation of corneal thickness and topography in normal eyes using the Orbscan corneal topography system". Br J Ophthalmol. 83 (7): 774–8. July 1999. doi:10.1136/bjo.83.7.774. PMC 1723104. PMID 10381661.
- ^ "CNN - Scientists discover biggest bacteria ever - April 15, 1999". www.cnn.com. Retrieved 20 May 2017.
- ^ "World's Smallest Frog Found—Fly-Size Beast Is Tiniest Vertebrate". 13 January 2017. Retrieved 20 May 2017.
- ^ NATO Infantry Weapons Standardization, Per G. Arvidsson, ChairmanWeapons & Sensors Working GroupLand Capability Group 1 – Dismounted Soldier NATO Army Armaments Group Archived 1 December 2012 at the Wayback Machine Accessed 29 April 2014
- ^ "World's smallest vertebrate has a big secret". New Scientist. Retrieved 20 May 2017.
- ^ "The Smallest Salamander". Mongabay.com. Retrieved 20 May 2017.
- ^ "Comparing quail eggs". BackYard Chickens. Retrieved 20 May 2017.
- ^ "USGA: Guide to the Rules on Clubs and Balls". USGA. Retrieved 30 September 2011.
- ^ "Credit Card Dimensions". Retrieved 30 September 2011.
- ^ Bohun B. Kinloch, Jr.; William H. Scheuner. "Pinus lambertiana". Archived from the original on 8 June 2011. Retrieved 1 May 2017.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help); Unknown parameter|last-author-amp=
ignored (|name-list-style=
suggested) (help) - ^ "HTwins.net - The Scale of the Universe". htwins.net. Retrieved 20 May 2017.
- ^ Laws of the Game (PDF), FIFA
- ^ IAAF International Association of Athletics Federations - IAAF.org - Statistics - Top Lists, archived from the original on 16 January 2008, retrieved 9 April 2010
{{citation}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ IAAF International Association of Athletics Federations - IAAF.org - Past Results, archived from the original on 4 June 2011, retrieved 9 April 2010
{{citation}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ Dagg, A. I. (1971), Mammalian Species 5 (Giraffa camelopardalis ed.), pp. 1–8
- ^ Plait, P. (6 October 2008). "Incoming!!!". Bad Astronomy. Archived from the original on 7 October 2008. Retrieved 8 October 2008.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Rule 1.04 The Playing Field" (PDF). Official Baseball Rules. Major League Baseball. 25 January 2010. pp. 1–5. Archived from the original (PDF) on 27 April 2011. Retrieved 1 April 2011.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) See especially Diagram No. 1, page 3. - ^ "Law 7 (The pitch)". Laws of Cricket. Marylebone Cricket Club. October 2010. Archived from the original on 14 May 2011. Retrieved 1 April 2011.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Animal Records". Smithsonian National Zoological Park. Archived from the original on 25 April 2009. Retrieved 29 May 2007.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ Highways Agency. "Driver Location Signs - Frequently Asked Questions". Archived from the original on 10 August 2012. Retrieved 10 February 2010.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Kingda Ka (Six Flags Great Adventure)". Archived from the original on 25 April 2009. Retrieved 18 April 2009.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Tour Eiffel". Retrieved 15 September 2010.
- ^ "Facts About the CN Tower". TripSavvy. Retrieved 20 May 2017.
- ^ "Burj Dubai all set for 09/09/09 soft opening". Emirates Business 24-7. Archived from the original on 19 January 2009. Retrieved 17 January 2009.
{{cite news}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "Education & Technical - Referees - Laws of the Game". FIFA.com.
- ^ "Tallest tree in the world: coast redwood". Monumental Trees, an inventory of big and old trees worldwide.
- ^ Fujiwara, Akira; et al. (2 June 2006). "The Rubble-Pile Asteroid Itokawa as Observed by Hayabusa". Science. 312 (5778): 1330–1334. Bibcode:2006Sci...312.1330F. doi:10.1126/science.1125841. PMID 16741107. Archived from the original on 2 April 2009. Retrieved 20 April 2009.
{{cite journal}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "long wave". Oxford Dictionaries. Retrieved 12 March 2011.
wavelength above one kilometre (and a frequency below 300 kHz)
- ^ "Golden Gate Bridge official website". Retrieved 10 June 2012.
- ^ "nautical mile". Merriam Webster. Retrieved 12 March 2011.
- ^ Akashi Kaikyo Bridge @ Everything2.com, Everything2, 9 September 2002, retrieved 19 April 2009
- ^ Jeffrey Friedl (9 December 2008), Supporting the Longest Suspension Bridge in the World, archived from the original on 25 April 2009, retrieved 19 April 2009
{{citation}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ New height of world's railway born in Tibet, Xinhua News Agency, 24 August 2005, archived from the original on 25 April 2009, retrieved 19 April 2009
{{citation}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "GeoNames".
- ^ "Russians in landmark Baikal dive". BBC News. 29 July 2008. Retrieved 12 March 2011.
current record of 1,637m was set in Lake Baikal in the 1990s
- ^ "Kosciuszko National Park lookouts and scenery". Office of Environment & Heritage: NSW National Parks & Wildlife Service.
- ^ "Carstensz Pyramid details". Carstensz Pyramid Site.
- ^ Appell, Wolfgang (16 September 2009) [2002]. "Königreich Frankreich" [Kingdom of France]. Amtliche Maßeinheiten in Europa 1842 [Official units of measure in Europe 1842] (in German). Archived from the original on 5 October 2011. Retrieved 10 February 2011 (Website based on Alte Meß- und Währungssysteme aus dem deutschen Sprachgebiet, ISBN 3-7686-1036-5.)
{{cite web}}
: templatestyles stripmarker in|postscript=
at position 91 (help)CS1 maint: postscript (link) - ^ Brewster, David (1830). The Edinburgh Encyclopædia. Vol. 12. Edinburgh, UK: William Blackwood, John Waugh, John Murray, Baldwin & Cradock, J. M. Richardson. p. 494. Retrieved 9 October 2015.
- ^ Brewster, David (1832). The Edinburgh Encyclopaedia. Vol. 12 (1st American ed.). Joseph and Edward Parker. Retrieved 9 October 2015.
- ^ Dingler, Johann Gottfried (1823). Polytechnisches Journal (in German). Vol. 11. Stuttgart, Germany: J.W. Gotta'schen Buchhandlung. Retrieved 9 October 2015.
- ^ Haugen, Einar, Norwegian English Dictionary, 1965, Oslo: Universitetsforlaget and Madison: University of Wisconsin Press, s.v. mil
- ^ https://sizes.com/units/farsakh.htm
- ^ "IAAF Competition Rules 2008" (PDF). IAAF. p. 195. Archived from the original (pdf) on 25 April 2009. Retrieved 20 April 2009.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ Gregory Kennedy. "Stratolab, an Evolutionary Stratospheric Balloon Project".
- ^ Wise, Jeff (1 October 2009). "Turkey Building the World's Deepest Immersed Tube Tunnel". Popular Mechanics. Retrieved 1 May 2017.
- ^ http://panamacanalfacts.com/facts-about-the-panama-canal/
- ^ Highest and lowest points on Mars Archived 31 January 2016 at the Wayback Machine NASA
- ^ Plescia, Jeff (1 October 1997). "Height of Martian vs. Earth mountains". Questions and Answers about Mars terrain and geology. Retrieved 20 April 2009.
- ^ "High Speed 1 Project Hoem". www.betchel.com. Betchel Corporation. Retrieved 8 February 2015.
- ^ "Bordeaux-Paris | the event". www.bordeauxparis.com. Retrieved 30 April 2017.
- ^ Thomas, P. C.; Parker, J. Wm.; McFadden, L. A.; et al. (2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–226. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID 16148926.
- ^ "FAQ-Alaska Highway Facts". The MILEPOST. Archived from the original on 29 September 2007. Retrieved 25 August 2007.
1,390 miles ... Alaska Route 2 and often treated as a natural extension of the Alaska Highway
- ^ Downward, R.J.; Bromell, J.E. (March 1990). "The development of a policy for the management of dingo populations in South Australia". Proceedings of the Fourteenth Vertebrate Pest Conference 1990. University of Nebraska - Lincoln. Archived from the original on 4 September 2009. Retrieved 31 August 2009.
{{cite encyclopedia}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ "China's Great Wall far longer than thought: survey". AFP. 20 April 2009. Archived from the original on 27 April 2009. Retrieved 20 April 2009.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help) - ^ CIS railway timetable, route No. 002, Moscow-Vladivostok. Archived 2009-12-03.
- ^ CIS railway timetable, route No. 350, Kiev-Vladivostok. Archived 2009-12-03.
- ^ McGourty, Christine (14 December 2005). "Hubble finds mass of white dwarf". BBC News. Retrieved 13 October 2007.
- ^ NASA Staff (10 May 2011). "Solar System Exploration - Earth's Moon: Facts & Figures". NASA. Retrieved 6 November 2011.
- ^ Sun Fact Sheet
- ^ Neuroscience: The Science of the Brain "Archived copy". Archived from the original on 2 February 2011. Retrieved 8 June 2011.
{{cite web}}
: Unknown parameter|deadurl=
ignored (|url-status=
suggested) (help)CS1 maint: archived copy as title (link) p.44 - ^ Moravveji, Ehsan; Guinan, Edward F; Shultz, Matt; Williamson, Michael H; Moya, Andres (4 January 2012). "Asteroseismology of the Nearby SN-II Progenitor: Rigel Part I. The MOST High Precision Photometry and Radial Velocity Monitoring". Astrophysical Journal: 2. arXiv:1201.0843. Bibcode:2012ApJ...747..108M. doi:10.1088/0004-637X/747/2/108. Retrieved 30 April 2017.
- ^ Richichi, A.; Roccatagliata, V. Aldebaran's angular diameter: How well do we know it?. Astronomy and Astrophysics, Volume 433, Issue 1, 1 April 2005, pp.305-312. "We derive an average value of 19.96±0.03 milliarcsec for the uniform disk diameter. The corresponding limb-darkened value is 20.58±0.03 milliarcsec, or 44.2±0.9 Rȯ."
- ^ Richichi, A. and Roccatagliata, V. derived an angular diameter of 20.58±0.03 milliarcsec, which given a distance of 65 light years yields a diameter of 61 million km
- ^ a b Wittkowski, M.; Hauschildt, P.H.; Arroyo-Torres, B.; Marcaide, J.M. (5 April 2012). "Fundamental properties and atmospheric structure of the red supergiant VY CMa based on VLTI/AMBER spectro-interferometry". Astronomy & Astrophysics. 540: L12. arXiv:1203.5194. Bibcode:2012A&A...540L..12W. doi:10.1051/0004-6361/201219126.
- ^ Humphreys, Roberta (13 October 2006). "VY Canis Majoris: the astrophysical basis of its luminosity". arXiv:astro-ph/0610433. Bibcode:2006astro.ph.10433H.
- ^ "Comet Hyakutake: Orbital elements and 10-day ephemeris". European Space Agency. Retrieved 7 December 2008.
- ^ Parthasarathy, M. (2000). "Birth and early evolution of planetary nebulae". Bulletin of the Astronomical Society of India. 28: 217–224. Bibcode:2000BASI...28..217P.
- ^ "Google Conversion".
- ^ radius = distance times sin(angular diameter/2) = 0.2 light year. Distance = 3.3 ± 0.9 kly; angular diameter = 20 arcseconds(Reed et al. 1999)
- ^ Michael Szpir (May–June 2001). "Bart Bok's Black Blobs". American Scientist. Archived from the original on 29 June 2003. Retrieved 19 November 2008.
Bok globules such as Barnard 68 are only about half a light-year across and weigh in at about two solar masses
- ^ Sandstrom, Karin M; Peek, J. E. G.; Bower, Geoffrey C.; Bolatto, Alberto D.; Plambeck, Richard L. (1999). "A Parallactic Distance of 389+24
−21 parsecs to the Orion Nebula Cluster from Very Long Baseline Array Observations". The Astrophysical Journal. 667 (2): 1161–1169. arXiv:0706.2361. Bibcode:2007ApJ...667.1161S. doi:10.1086/520922. - ^ diameter=sin(65 arcminutes)*1270 light years=24; where "65.00 x 60.0 (arcmin)" sourced from Revised NGC Data for NGC 1976
- ^ distance × sin( diameter_angle ), using distance of 5kpc (15.8 ± 1.1 kly) and angle 36.3', = 172 ± 12.5 ly.
- ^ van de Ven, G.; van den Bosch, R. C. E.; Verolme, E. K.; de Zeeuw, P. T. (11 January 2006). "The dynamical distance and intrinsic structure of the globular cluster ω Centauri". Astronomy and Astrophysics. 445 (2): 513–543. arXiv:astro-ph/0509228. Bibcode:2006A&A...445..513V. doi:10.1051/0004-6361:20053061.
best-fit dynamical distance D=4.8±0.3 kpc ... consistent with the canonical value 5.0±0.2 kpc obtained by photometric methods
- ^ a b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ^ Harper, Graham M.; Brown, Alexander; Guinan, Edward F. (April 2008). "A New VLA-Hipparcos Distance to Betelgeuse and its Implications" (PDF). The Astronomical Journal. 135 (4): 1430–40. Bibcode:2008AJ....135.1430H. doi:10.1088/0004-6256/135/4/1430.
- ^ Harris, Hugh C.; Dahn, Conard C.; Canzian, Blaise; Guetter, Harry H.; et al. (February 2007). "Trigonometric Parallaxes of Central Stars of Planetary Nebulae". The Astronomical Journal. 133 (2): 631–638. arXiv:astro-ph/0611543. Bibcode:2007AJ....133..631H. doi:10.1086/510348.
- ^
Reid, M. J.; et al. (2009). "Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions". Astrophysical Journal. 700: 137–148. arXiv:0902.3913. Bibcode:2009ApJ...700..137R. doi:10.1088/0004-637X/700/1/137.
{{cite journal}}
: CS1 maint: extra punctuation (link) - ^ a b "SI Brochure: The International System of Units (SI)". International Committee for Weights and Measures. Organisation Intergouvernementale de la Convention du Mètre. Retrieved 11 October 2014.
- ^ Local Group
External links
- How Big Are Things? displays orders of magnitude in successively larger rooms
- Powers of Ten Travel across the Universe. Altering perspective by changing scale by just a few powers of ten (interactive) [dead link ]
- Cosmos – an Illustrated Dimensional Journey from microcosmos to macrocosmos – from Digital Nature Agency
- Scale of the universe- interactive guide to length magnitudes