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*2.72 m – (8 feet 11 inches) – tallest-known human (Robert Wadlow)<ref name="Guinness"/>
*2.72 m – (8 feet 11 inches) – tallest-known human (Robert Wadlow)<ref name="Guinness"/>
*3 m – length of a [[giant Gippsland earthworm]]
*3 m – length of a [[giant Gippsland earthworm]]
*3 m – length of an [[Komodo dragon]], the largest living lizard
*3.63 m – the record wingspan for living birds (a [[wandering albatross]])
*3.63 m – the record wingspan for living birds (a [[wandering albatross]])
*3.7 m – leg span of a [[Japanese spider crab]]
*3.7 m – leg span of a [[Japanese spider crab]]

Latest revision as of 15:28, 11 December 2024

Objects of sizes in different order of magnitude (at inconsistent intervals)
Graphical overview of sizes

The following are examples of orders of magnitude for different lengths.

Overview

[edit]
Scale Range (m) Unit Example items
≥ <
Subatomic – 0 – Gravitational singularity
10−36 10−33 ℓP Fixed value (not a range). Quantum foam, string
10−18 10−15 am Proton, neutron, pion
Atomic to cellular 10−15 10−12 fm Atomic nucleus
10−12 10−9 pm Wavelength of gamma rays and X-rays, hydrogen atom
10−9 10−6 nm DNA helix, virus, wavelength of optical spectrum, transistors used in CPUs
Cellular to human 10−6 10−3 μm Bacterium, fog water droplet, human hair's diameter[note 1]
10−3 1 mm Mosquito, golf ball, domestic cat, violin, football
Human to astronomical 1 103 m Piano, human, automobile, sperm whale, football field, Eiffel Tower
103 106 km Mount Everest, length of Panama Canal and Trans-Siberian Railway, larger asteroid
Astronomical 106 109 Mm The Moon, Earth, one light-second
109 1012 Gm Sun, one light-minute, Earth's orbit
1012 1015 Tm Orbits of outer planets, Solar System
1015 1018 Pm A light-year, the distance to Proxima Centauri
1018 1021 Em Galactic arm
1021 1024 Zm Milky Way, distance to Andromeda Galaxy
1024 1027 Ym Huge-LQG, Hercules–Corona Borealis Great Wall, Observable universe

Detailed list

[edit]

To help compare different orders of magnitude, the following list describes various lengths between  meters and meters.

Subatomic scale

[edit]
Factor (m) Multiple Value Item
0 0 0 Singularity
10−35 1 Planck length 0.0000162 qm  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 scale.
10−24 1 yoctometer (ym) 142 ym Effective cross section radius of 1 MeV neutrinos[2]
10−21 1 zeptometer (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 Effective cross section radius of high-energy neutrinos[3]
310 zm De Broglie wavelength of protons at the Large Hadron Collider (4 TeV as of 2012)
10−18 1 attometer (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 scale

[edit]
Factor (m) Multiple Value Item
10−15 1 femtometer (fm, fermi) 1 fm Approximate limit of the gluon-mediated color force between quarks[6][7]
1.5 fm Effective cross section radius of an 11 MeV proton[8]
2.81794 fm Classical electron radius[9]
3 fm Approximate limit of the meson-mediated nuclear binding force[6][7]
750 to 822.25 fm Longest wavelength of gamma rays
10−12 1 picometer (pm) 1.75 to 15 fm Diameter range of the atomic nucleus[1][10]
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 28 pm Radius of helium atom
53 pm Bohr radius (radius of a hydrogen atom)
10−10 100 pm 100 pm 1 ångström (also covalent radius of sulfur atom[11])
154 pm Length of a typical covalent bond (C–C)
280 pm Average size of the water molecule (actual lengths may vary)
500 pm Width of protein α helix
10−9 1 nanometer (nm) 1 nm Diameter of a carbon nanotube[12]

Diameter of smallest transistor gate (as of 2016)[13]

2 nm Diameter of the DNA helix[14]
2.5 nm Smallest microprocessor transistor gate oxide thickness (as of January 2007)[citation needed]
3.4 nm Length of a DNA turn (10 bp)[15]
6–10 nm Thickness of cell membrane
10−8 10 nm 10 nm Upper range of thickness of cell wall in Gram-negative bacteria[16]
10 nm As of 2016, the 10 nanometer was the smallest semiconductor device fabrication node[17]
40 nm Extreme ultraviolet wavelength
50 nm Flying height of the head of a hard disk[18]
10−7 100 nm 121.6 nm Wavelength of the Lyman-alpha line[19]
120 nm Typical diameter of the human immunodeficiency virus (HIV)[20]
400–700 nm Approximate wavelength range of visible light[21]

Cellular to human scale

[edit]
Factor (m) Multiple Value Item
10−6 1 micrometer (μm)

(also called 1 micron)

1–4 μm Typical length of a bacterium[22]
4 μm Typical diameter of spider silk[23]
7 μm Typical size of a red blood cell[24]
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[25]
10−4 100 μm 340 μm Size of a pixel on a 17-inch monitor with a resolution of 1024×768
560 μm Thickness of the central area of a human cornea[26]
750 μm Maximum diameter of Thiomargarita namibiensis, the second largest bacterium ever discovered
10−3 1 millimeter (mm) ~5 mm Length of an average flea is 1–10 mm (usually <5 mm)[27]
2.54 mm One-tenth 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 centimeter (cm) 20 mm Approximate width of an adult human finger
54 mm × 86 mm Dimensions of a credit card, according to the ISO/IEC 7810 ID-1 standard
73–75 mm Diameter of a baseball, according to Major League Baseball guidelines[28]
10−1 1 decimeter (dm) 120 mm Diameter of a compact disc
660 mm Length of the longest pine cones, produced by the sugar pine[29]
900 mm Average length of a rapier, a fencing sword[30]

Human to astronomical scale

[edit]
Planets of the Solar System to scale
Factor (m) Multiple Value Item
1 (100) 1 meter (m) 1 m (exactly) Since 2019, defined as the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second, where the second is defined by a hyperfine transition frequency of caesium.
2.72 m Height of Robert Wadlow, tallest-known human.[31]
8.38 m Length of a London bus (AEC Routemaster)
101 1 decameter (dam) 33 m Length of the longest-known blue whale[32]
52 m Height of the Niagara Falls[33]
93.47 m Height of the Statue of Liberty
102 1 hectometer (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 kilometer (km) 2.3 km Length of the Three Gorges Dam, the largest dam in the world[34][35]
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 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
600km Thermosphere height
974.6 km Greatest diameter of the dwarf planet Ceres.[36]
106 1 megameter (Mm) 2.38 Mm Diameter of dwarf planet Pluto, formerly the smallest planet category[note 2] in the Solar System
3.48 Mm Diameter of the Moon
5.2 Mm Typical distance covered by the winner of the 24 Hours of Le Mans automobile endurance race
6.259 Mm Length of the Great Wall of China
6.371 Mm Average radius of Earth
6.378 Mm Equatorial radius of Earth
6.6 Mm Approximate length of the two longest rivers, the Nile and the Amazon
7.821 Mm Length of the Trans-Canada Highway
9.288 Mm Length of the Trans-Siberian Railway, longest in the world

Astronomical scale

[edit]
Factor (m) Multiple Value Item
107 10 Mm 12.756 Mm Equatorial diameter of Earth
20.004 Mm Length of a meridian on Earth (distance between Earth's poles along the surface)[37]
40.075 Mm Length of Earth's equator
108 100 Mm 142.984 Mm Diameter of Jupiter
299.792 Mm Distance traveled by light in vacuum in one second (a light-second, exactly 299,792,458 m by definition of the speed of light)
384.4 Mm Moon's orbital distance from Earth
109 1 gigameter (Gm) 1.39 Gm Diameter of the Sun
5.15 Gm Greatest mileage ever recorded by a car (3.2 million miles by a 1966 Volvo P-1800S)[38]
1010 10 Gm 18 Gm Approximately one light-minute
1011 100 Gm 150 Gm 1 astronomical unit (au); mean distance between Earth and Sun
1012 1 terameter (Tm) 1.3 Tm Optical diameter of Betelgeuse
1.4 Tm Orbital distance of Saturn from Sun
2 Tm Estimated optical diameter of VY Canis Majoris, one of the largest-known stars
5.9 Tm Orbital distance of Pluto from the Sun
~ 7.5 Tm Outer boundary of the Kuiper belt
1013 10 Tm Diameter of the Solar System as a whole[1]
16.09 Tm Total length of DNA molecules in all cells of an adult human body[39]
21.49 Tm Distance of the Voyager 1 spacecraft from Sun (as of Oct 2018), the farthest man-made object so far[40]
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 180 Tm Size of the debris disk around the star 51 Pegasi[41]
1015 1 petameter (Pm) ~7.5 Pm Supposed outer boundary of the Oort cloud (~ 50,000 au)
9.461 Pm Distance traveled by light in vacuum in one year; at its current speed, Voyager 1 would need 17,500 years to travel this distance
1016 10 Pm 30.857 Pm 1 parsec
39.9 Pm Distance to nearest star (Proxima Centauri)
41.3 Pm As of March 2013, distance to nearest discovered extrasolar planet (Alpha Centauri Bc)
1017 100 Pm 193 Pm As of October 2010, distance to nearest discovered extrasolar planet with potential to support life as presently defined by science (Gliese 581 d)
615 Pm Approximate radius of humanity's radio bubble, caused by high-power TV broadcasts leaking through the atmosphere into outer space
1018 1 exameter (Em) 1.9 Em Distance to nearby solar twin (HIP 56948), a star with properties virtually identical to the Sun[42]
1019 10 Em 9.46 Em Average thickness of Milky Way Galaxy[43] (1,000 to 3,000 ly by 21 cm observations[44])
1020 100 Em 113.5 Em Thickness of Milky Way Galaxy's gaseous disk[45]
1021 1 zettameter (Zm)
1.54 Zm Distance to SN 1987A, the most recent naked eye supernova
1.62 Zm Distance to the Large Magellanic Cloud (a dwarf galaxy orbiting the Milky Way)
1.66 Zm Distance to the Small Magellanic Cloud (another dwarf galaxy orbiting the Milky Way)
1.9 Zm Diameter of galactic disk of Milky Way Galaxy[46][47][48][49]
6.15 Zm Diameter of the low surface brightness disc halo of the giant spiral galaxy Malin 1
1022 10 Zm 13.25 Zm Radius of the diffuse stellar halo of IC 1101, one of the largest-known galaxies
24 Zm Distance to Andromeda Galaxy
30.857 Zm 1 megaparsec
50 Zm Diameter of Local Group of galaxies
1023 100 Zm 300–600 Zm Distance to Virgo cluster of galaxies
1024 1 yottameter (Ym) 2.19 Ym Diameter of the Local Supercluster and the largest voids and filaments
2.8 Ym End of Greatness
~5 Ym Diameter of the Horologium Supercluster[50]
9.461 Ym Diameter of the Pisces–Cetus Supercluster Complex, the supercluster complex which includes Earth
1025 10 Ym 13 Ym Length of the Sloan Great Wall, a giant wall of galaxies (galactic filament)[51]
30.857 Ym 1 gigaparsec
37.84 Ym Length of the Huge-LQG, a group of 73 quasars
1026 100 Ym 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
127 Ym Estimated light travel distance to GN-z11, the most distant object ever observed
870 Ym Approximate diameter (comoving distance) of the visible universe[1]
1027 1 Rm 1.2 Rm 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[52] It equivalently implies that there are at minimum 21 particle horizon-sized volumes in the universe.
[note 3] m m 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.[53][54]
m m Maximum size of universe after cosmological inflation, implied by one resolution of the No-Boundary Proposal[55]

1 quectometer and less

[edit]

The quectometre (SI symbol: qm) is a unit of length in the metric system equal to 10−30 metres. To help compare different orders of magnitude, this section lists lengths shorter than 10−30 m (1 qm).

  • 1.6 × 10−5 quectometers (1.6 × 10−35 meters) – the Planck length (Measures of distance shorter than this do not make physical sense, according to current theories of physics.)
  • 1 qm – 1 quectometer, the smallest named subdivision of the meter in the SI base unit of length, one nonillionth of a meter.[56]

1 rontometer

[edit]

The rontometre (SI symbol: rm) is a unit of length in the metric system equal to 10−27 metres.

  • 1 rm – 1 rontometer, a subdivision of the meter in the SI base unit of length, one octillionth of a meter.[56]

10 rontometers

[edit]

1 yoctometer

[edit]

The yoctometre (SI symbol: ym) is a unit of length in the metric system equal to 10−24 metres.

1 zeptometer

[edit]

The zeptometre (SI symbol: zm) is a unit of length in the metric system equal to 10−21 metres. To help compare different orders of magnitude, this section lists lengths between 10−21 m and 10−20 m (1 zm and 10 zm).

10 zeptometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−20 m and 10−19 m (10 zm and 100 zm).

100 zeptometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−19 m and 10−18 m (100 zm and 1 am).

1 attometer

[edit]

The attometre (SI symbol: am) is a unit of length in the metric system equal to 10−18 metres. To help compare different orders of magnitude, this section lists lengths between 10−18 m and 10−17 m (1 am and 10 am).

10 attometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−17 m and 10−16 m (10 am and 100 am).

100 attometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−16 m and 10−15 m (100 am and 1 fm).

  • 831 am – approximate proton radius[60][61]

1 femtometer (or 1 fermi)

[edit]

The femtometre (SI symbol: fm) is a unit of length in the metric system equal to 10−15 metres. In particle physics, this unit is sometimes called a fermi, also with abbreviation "fm". To help compare different orders of magnitude, this section lists lengths between 10−15 meters and 10−14 meters (1 femtometer and 10 fm).

10 femtometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−14 m and 10−13 m (10 fm and 100 fm).

100 femtometers

[edit]

To help compare different orders of magnitude, this section lists lengths between 10−13 m and 10−12 m (100 fm and 1 pm).

  • 570 fm – typical distance from the atomic nucleus of the two innermost electrons (electrons in the 1s shell) in the uranium atom, the heaviest naturally-occurring atom

1 picometer

[edit]

The picometre (SI symbol: pm) is a unit of length in the metric system equal to 10−12 metres (⁠1/1000000000000⁠ m = 0.000000000001 m). To help compare different orders of magnitude this section lists lengths between 10−12 and 10−11 m (1 pm and 10 pm).

10 picometers

[edit]

To help compare different orders of magnitude this section lists lengths between 10−11 and 10−10 m (10 pm and 100 pm).

100 picometers

[edit]

To help compare different orders of magnitude this section lists lengths between 10−10 and 10−9 m (100 pm and 1 nm; 1 Å and 10 Å).

1 nanometer

[edit]

The nanometre (SI symbol: nm) is a unit of length in the metric system equal to 10−9 metres (⁠1/1000000000⁠ m = 0.000000001 m). To help compare different orders of magnitude, this section lists lengths between 10−9 and 10−8 m (1 nm and 10 nm).

10 nanometers

[edit]
Comparison of sizes of semiconductor manufacturing process nodes with some microscopic objects and visible light wavelengths. At this scale, the width of a human hair is about 10 times that of the image.[71]

To help compare different orders of magnitude this section lists lengths between 10−8 and 10−7 m (10 nm and 100 nm).

100 nanometers

[edit]
Comparison of sizes of semiconductor manufacturing process nodes with some microscopic objects and visible light wavelengths. At this scale, the width of a human hair is about 10 times that of the image.[79]

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[80]
  • 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[81]
  • 120 nm – diameter of a human immunodeficiency virus (HIV)[82]
  • 120 nm – approximate diameter of SARS-CoV-2[83]
  • 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 nm – greatest particle size that can fit through a HEPA (high efficiency particulate air) filter (N100 removes up to 99.97% at 300 nm, N95 removes up to 95% at 300 nm)[84]
  • 300–400 nm – near ultraviolet wavelength
  • 400–420 nm – wavelength of violet light (see Color and Visible spectrum)
  • 420–440 nm – wavelength of indigo light
  • 440–500 nm – wavelength of blue light
  • 500–520 nm – wavelength of cyan light
  • 520–565 nm – wavelength of green light
  • 565–590 nm – wavelength of yellow light
  • 590–625 nm – wavelength of orange light
  • 625–700 nm – wavelength of red light
  • 700–1.4 μm – wavelength of near-infrared radiation

1 micrometer (or 1 micron)

[edit]
The silk for a spider's web is 5–7 μm (0.00020–0.00028 in) wide.

The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10−6 metres (⁠1/1000000⁠ m = 0.000001 m). 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 micrometers, or μm).

10 micrometers

[edit]
Fog particles are around 10–50 μm (0.00039–0.00197 in) long.

To help compare different orders of magnitude, this section lists lengths between 10−5 m and 10−4 m (10 μm and 100 μm).

100 micrometers

[edit]
A paramecium is around 300 μm (0.012 in) long.

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 myriometer (abbr. mom, equivalent to 100 micrometers; frequently confused with the myriameter, 10 kilometers)[98] is deprecated; the decimal metric prefix myrio-[99] is obsolete[100][101][102] and was not included among the prefixes when the International System of Units was introduced in 1960.

1 millimeter

[edit]
An average red ant is about 5 mm (0.20 in) long.
"1mm" redirects here. For the Perfume song, see Level3 (Perfume album). For the measure, see millimetre.

The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10−3 metres (⁠1/1000⁠ m = 0.001 m). 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 – 1/1,000 of a meter
  • 1.0 mm – 0.03937 inches or 5/127 (exactly)
  • 1.0 mm – side of a square of area 1 mm²
  • 1.0 mm – diameter of a pinhead
  • 1.5 mm – average length of a flea[27]
  • 2.54 mm – distance between pins on old dual in-line package (DIP) 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[109]
  • 7.1 mm – length of a sunflower seed
  • 7.62×51mm NATO – common military ammunition size[110]
  • 8 mm – width of old-format home movie film
  • 8 mm – length of a Paedocypris progenetica, the smallest-known fish[111]

1 centimeter

[edit]
An average human fingernail is 1 cm (0.39 in) wide
"10 mm" redirects here. For firearms cartridges, see 10 mm calibre.

The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres (⁠1/100⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10−2 m and 10−1 m (1 cm and 1 dm).

  • 1 cm – 10 millimeters
  • 1 cm – 0.39 inches
  • 1 cm – edge of a square of area 1 cm2
  • 1 cm – edge of a 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 die
  • 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[112]
  • 2 cm – approximate width of an adult human finger
  • 2.54 cm – 1 inch
  • 3.08568 cm – 1 attoparsec
  • 3.4 cm – length of a quail egg[113]
  • 3.5 cm – width of film commonly used in motion pictures and still photography
  • 3.78 cm – amount of distance the Moon moves away from Earth each year[114]
  • 4.3 cm – minimum diameter of a golf ball[115]
  • 5 cm – usual diameter of a chicken egg
  • 5 cm – height of a hummingbird, the smallest-known bird
  • 5.08 cm – 2 inches,
  • 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[28]
  • 8.6 cm × 5.4 cm – dimensions of a standard credit card (also called CR80)[116][117]
  • 9 cm – length of a speckled padloper, the smallest-known turtle

1 decimeter

[edit]
"10cm" redirects here. For the band, see 10cm (band).
An adult human foot is about 28 cm (11 in) long.

The decimetre (SI symbol: dm) is a unit of length in the metric system equal to 10−1 metres (⁠1/10⁠ m = 0.1 m). To help compare different orders of magnitude, this section lists lengths between 10 centimeters and 100 centimeters (10−1 meter and 1 meter).

Conversions

[edit]

10 centimeters (abbreviated to 10 cm) is equal to:

Wavelengths

[edit]

Human-defined scales and structures

[edit]
  • 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[30]
  • 91.44 cm = 9.144 dm – one yard (measure)

Nature

[edit]
  • 10 cm = 1 dm – diameter of the human cervix upon entering the second stage of labour
  • 11 cm = 1.1 dm – length of an average potato in the US
  • 13 cm = 1.3 dm – body length of a Goliath birdeater
  • 15 cm = 1.5 dm – approximate size of largest beetle species
  • 19 cm = 1.9 dm – length of a banana
  • 26.3 cm = 2.6 dm – length of average male human foot
  • 29.98 cm = 2.998 dm – distance light in vacuum travels in one nanosecond
  • 30 cm = 3.0 dm – maximum leg length of a Goliath birdeater
  • 31 cm = 3.1 dm – wingspan of largest butterfly species Ornithoptera alexandrae
  • 32 cm – length of the Goliath frog, the world's largest frog
  • 46 cm = 4.6 dm – length of an average domestic cat
  • 50 to 65 cm = 5–6.5 dm – a coati's tail
  • 66 cm = 6.6 dm – length of the longest pine cones (produced by the sugar pine[118])

Astronomical

[edit]
  • 84 cm = 8.4 dm – approximate diameter of 2008 TS26, a meteoroid

1 meter

[edit]
"1m" redirects here. For other uses, see 1M.
Leonardo da Vinci drew the Vitruvian Man within a square of side 1.83 m (6 ft 0 in) and a circle about 1.2 m (3 ft 11 in) in radius.

To help compare different orders of magnitude, this section lists lengths between one meter and ten meters. Light, in vacuum, travels 1 meter in 1⁄299,792,458, or 3.3356409519815E-9 of a second.

Conversions

[edit]

1 meter is:

Human-defined scales and structures

[edit]
  • 1 m – approximate height of the top part of a doorknob on a door
  • 1 m – diameter of a very large beach ball
  • 1.29 m – length of the Cross Island Chapel, the smallest church in the world
  • 1.4 m – length of a Peel P50, the world's smallest car
  • 1.435 m – standard gauge of railway track used by about 60% of railways in the world = 4 ft 81⁄2 in
  • 2.5 m – distance from the floor to the ceiling in an average residential house[119]
  • 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 m – length of the Tsar Bomba, the largest bomb ever detonated
  • 8.38 m – the length of a London Bus (AEC Routemaster)

Sports

[edit]
  • 2.44 m – height of an association football goal[120]
  • 2.45 m – highest high jump by a human (Javier Sotomayor)[121]
  • 3.05 m – (10 feet) height of the basket in basketball
  • 8.95 m – longest long jump by a human (Mike Powell)[122]

Nature

[edit]

Astronomical

[edit]
  • 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 7 October 2008[125]

1 decameter

[edit]
A blue whale has been measured as 33 m (108 ft) long; this drawing compares its length to that of a human diver and a dolphin.

The decametre (SI symbol: dam) is a unit of length in the metric system equal to 10 meters (101 m). To help compare different orders of magnitude, this section lists lengths between 10 and 100 meters.

Conversions

[edit]

10 meters (very rarely termed a decameter which is abbreviated as dam) is equal to:

Human-defined scales and structures

[edit]

Sports

[edit]
  • 11 meters – approximate width of a doubles tennis court
  • 15 meters – width of a standard FIBA basketball court
  • 15.24 meters – width of an NBA basketball court (50 feet)
  • 18.44 meters – distance between the front of the pitcher's rubber and the rear point of home plate on a baseball field (60 feet, 6 inches)[126]
  • 20 meters – length of cricket pitch (22 yards)[127]
  • 27.43 meters – distance between bases on a baseball field (90 feet)
  • 28 meters – length of a standard FIBA basketball court
  • 28.65 meters – length of an NBA basketball court (94 feet)
  • 49 meters – width of an American football field (531⁄3 yards)
  • 59.436 meters – width of a Canadian football field (65 yards)
  • 70 meters – typical width of an association football field
  • 91 meters – length of an American football field (100 yards, measured between the goal lines)

Nature

[edit]
  • 10 meters – average length of human digestive tract[citation needed]
  • 12 meters – height of a saguaro cactus
  • 12 meters – length of a whale shark, largest living fish
  • 12 meters – wingspan of a Quetzalcoatlus, a pterosaur
  • 12.8 meters – length of a Titanoboa, the largest snake to have ever lived
  • 13 meters – length of a giant squid and colossal squid, the largest living invertebrates
  • 15 meters – 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
  • 16 meters – length of a sperm whale, the largest toothed whale
  • 18 meters – height of a Sauroposeidon, the tallest-known dinosaur
  • 20 meters – length of a Leedsichthys, the largest-known fish to have lived
  • 21 meters – height of High Force waterfall in England
  • 30.5 meters – length of the lion's mane jellyfish, the largest jellyfish in the world
  • 33 meters – length of a blue whale,[128] the largest animal on earth, living or extinct, in terms of mass
  • 39 meters – length of a Supersaurus, the longest-known dinosaur and longest vertebrate[129]
  • 52 meters – height of Niagara Falls[33]
  • 55 meters – length of a bootlace worm, the longest-known animal[130]
  • 66 meters – highest possible sea level rise due to a complete melting of all ice on Earth
  • 83 meters – height of a western hemlock
  • 84 meters – height of General Sherman, the largest tree in the world

Astronomical

[edit]
  • 30 meters – diameter of 1998 KY26, a rapidly spinning meteoroid
  • 30.8568 meters – 1 femtoparsec
  • 32 meters – approximate diameter of 2008 HJ, a small meteoroid

1 hectometer

[edit]
The Great Pyramid of Giza is 138.8 m (455 ft) high.
British driver location sign and location marker post on the M27 in Hampshire. The location marker posts are installed at 100-meter intervals.[131]

The hectometre (SI symbol: hm) is a unit of length in the metric system equal to 100 meters (102 m). To compare different orders of magnitude this section lists lengths between 100 meters and 1,000 meters (1 kilometer).

Conversions

[edit]

100 meters (sometimes termed a hectometer) 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

[edit]
  • 100 meters – wavelength of the highest medium wave radio frequency, 3 MHz
  • 100 meters – spacing of location marker posts on British motorways
  • 110 meters – height of the Saturn V
  • 122 meters – height of the Starship, the tallest rocket currently under development by SpaceX
  • 138.8 meters – height of the Great Pyramid of Giza (Pyramid of Cheops)
  • 139 meters – height of the world's tallest roller coaster, Kingda Ka[132]
  • 157 meters – height of the Cologne Cathedral
  • 162 meters – height of the Ulm Minster, the tallest church building in the world
  • 165 meters – height of the Dushanbe Flagpole, the tallest flagpole from May 2011 to September 2014
  • 169 meters – height of the Washington Monument
  • 171 meters – height of the Jeddah Flagpole, the tallest flagpole from September 2014 to December 2021
  • 182 meters – height of the Statue of Unity, the world's tallest statue
  • 187 meters – shortest wavelength of the broadcast radio AM band, 1600 kHz
  • 192 meters – height of the Gateway Arch
  • 202 meters – height of the Cairo Flagpole, the tallest flagpole as of December 2021
  • 202 meters – length of the Széchenyi Chain Bridge connecting Buda and Pest
  • 220 meters – height of the Hoover Dam
  • 245 meters – length of the LZ 129 Hindenburg
  • 270 meters – length of the Titanic
  • 318 meters – height of The New York Times Building
  • 318.9 meters – height of the Chrysler Building
  • 328 meters – height of Auckland's Sky Tower, the tallest free-standing structure in the Southern Hemisphere (1996–2022)
  • 330 meters – height of the Eiffel Tower (including antenna)[133]
  • 336 meters – height of the world's tallest bridge as of October 2023, the Millau Viaduct
  • 364.75 meters – length of the Icon of the Seas
  • 390 meters – height of the Empire State Building
  • 400–800 meters – approximate heights of the world's tallest skyscrapers from 1931 to 2010
  • 458 meters – length of the Knock Nevis, the world's largest supertanker
  • 553.33 meters – height of the CN Tower[134], the tallest structure in North America
  • 555 meters – longest wavelength of the broadcast radio AM band, 540 kHz
  • 630 meters – height of the KVLY-TV mast, one of the tallest structures in the world
  • 646 meters – height of the Warsaw radio mast, the world's tallest structure until its collapse in 1991
  • 679 meters – height of Merdeka 118, the second tallest structure in Kuala Lumpur, Malaysia
  • 828 meters – height of Burj Khalifa, world's tallest structure since 17 January 2009[135]
  • 1,000 meters – wavelength of the lowest mediumwave radio frequency, 300 kHz

Sports

[edit]
  • 100 meters – the distance a very fast human can run in about 10 seconds
  • 100.584 meters – length of a Canadian football field between the goal lines (110 yards)
  • 91.5 meters – 137 meters – length of a soccer field[120]
  • 105 meters – length of football pitch (UEFA stadium categories 3 and 4)
  • 105 meters – length of a typical football field
  • 109.73 meters – total length of an American football field (120 yards, including the end zones)
  • 110–150 meters – the width of an Australian football field
  • 135–185 meters – the length of an Australian football field
  • 137.16 meters – total length of a Canadian football field, including the end zones (150 yards)

Nature

[edit]
  • 115.5 meters – height of the world's tallest tree in 2007, the Hyperion sequoia[136]
  • 310 meters – maximum depth of Lake Geneva
  • 340 meters – distance sound travels in air at sea level in one second; see Speed of sound
  • 947 meters – height of the Tugela Falls, the highest waterfall in Africa
  • 979 meters – height of the Angel Falls, the world's highest free-falling waterfall (Venezuela)

Astronomical

[edit]

1 kilometer

[edit]
Mount Fuji is 3.776 kilometres (2.346 mi) high.

The kilometre (SI symbol: km) is a unit of length in the metric system equal to 1000 meters (103 m). To help compare different orders of magnitude, this section lists lengths between 1 kilometer and 10 kilometers (103 and 104 meters).

Conversions

[edit]

1 kilometer (unit symbol km) is equal to:

Human-defined scales and structures

[edit]

Nature

[edit]
  • 1.5 km – distance sound travels in water in one second

Geographical

[edit]
See also: List of highest mountains on Earth

Astronomical

[edit]

10 kilometers (1 myriameter)

[edit]
The Strait of Gibraltar is 13 km (8.1 mi) wide.

To help compare different orders of magnitude, this section lists lengths between 10 and 100 kilometers (104 to 105 meters). The myriameter[148] (sometimes also spelled myriometer; 10,000 meters) is a deprecated unit name; the decimal metric prefix myria-[99] (sometimes also written as myrio-[149][150][151]) is obsolete[100][101][102] and was not included among the prefixes when the International System of Units was introduced in 1960.

Conversions

[edit]

10 kilometers is equal to:

Distance marker on the Rhine: 36 (XXXVI) myriameters from Basel. The stated distance is 360 km (220 mi); the comma is the decimal separator in Germany.

Sports

[edit]

Human-defined scales and structures

[edit]

Geographical

[edit]

Astronomical

[edit]

100 kilometers

[edit]
The Suez Canal is 163 km (101 mi) long.

A length of 100 kilometers (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 kilometers (105 and 106 meters).

Conversions

[edit]

A distance of 100 kilometers is equal to about 62 miles (or 62.13711922 miles).

Human-defined scales and structures

[edit]

Geographical

[edit]

Astronomical

[edit]

1 megameter

[edit]
Small planets, the Moon and dwarf planets in the Solar System have diameters from one to ten million meters. Top row: Mars (left), Mercury (right); bottom row: Moon (left), Pluto (center), and Haumea (right), to scale.

The megametre (SI symbol: Mm) is a unit of length in the metric system equal to 1000000 meters (106 m). To help compare different orders of magnitude, this section lists lengths starting at 106 m (1 Mm or 1,000 km).

Conversions

[edit]

1 megameter is equal to:

  • 1000 km
  • 1 E+6 m (one million meters)
  • approximately 621.37 miles
  • 1 E+12 μm (one trillion micrometers)
  • Side of square with area 1,000,000 km2

Human-defined scales and structures

[edit]

Sports

[edit]

Geographical

[edit]

Astronomical

[edit]

10 megameters

[edit]
Planets from Venus up to Uranus have diameters from ten to one hundred million meters. Top row: Uranus (left), Neptune (right); middle row: Earth (left), Sirius B (center), and Venus (right), to scale.

To help compare different orders of magnitude, this section lists lengths starting at 107 meters (10 megameters or 10,000 kilometers).

Conversions

[edit]

10 megameters (10 Mm) is

Human-defined scales and structures

[edit]

Geographical

[edit]

Astronomical

[edit]
  • 12.000 Mm – diameter of Sirius B, a white dwarf[167]
  • 12.104 Mm – diameter of Venus
  • 12.742 Mm – diameter of Earth
  • 12.900 Mm – minimum distance of the meteoroid 2004 FU162 from the centre 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
  • 30.8568 Mm – 1 nanoparsec
  • 34.770 Mm – minimum distance of the asteroid 99942 Apophis on 13 April 2029 from the centre 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 megameters

[edit]
The Earth-Moon orbit, Saturn, OGLE-TR-122b, Jupiter, and other objects, to scale. Click on image for detailed view and links to other length scales.
Scale model at megameters of the main Solar System bodies

To help compare different orders of magnitude, this section lists lengths starting at 108 meters (100 megameters or 100,000 kilometers or 62,150 miles).

1 gigameter

[edit]
13 things in the gigameter group
Upper part: Gamma Orionis, Algol B, the Sun (centre), and other objects to scale

; lower part: their darker mirror images (artist's interpretation).

The gigametre (SI symbol: Gm) is a unit of length in the metric system equal to 1000000000 meters (109 m). To help compare different distances this section lists lengths starting at 109 meters (1 gigameter (Gm) or 1 billion meters).

10 gigameters

[edit]
Rigel and Aldebaran (top left and right) compared to smaller stars, the Sun (very small dot in lower middle, with orbit of Mercury as yellow ellipse) and transparent sphere with radius of one light-minute

To help compare different distances this section lists lengths starting at 1010 meters (10 gigameters (Gm) or 10 million kilometers, or 0.07 astronomical units).

100 gigameters

[edit]
From largest to smallest: Jupiter's orbit, red supergiant star Betelgeuse, Mars' orbit, Earth's orbit, star R Doradus, and orbits of Venus, Mercury. Inside R Doradus's depiction are the blue supergiant star Rigel and red giant star Aldebaran. The faint yellow glow around the Sun represents one light-minute. Click image to see more details and links to their scales.

To help compare distances at different orders of magnitude this section lists lengths starting at 1011 meters (100 gigameter or 100 million kilometers or 0.7 astronomical units).

1 terameter

[edit]
Eight things in the terameter group
Comparison of size of the Kuiper belt (large faint torus) with the star VY Canis Majoris (within Saturn's orbit), Betelgeuse (inside Jupiter's orbit) and R Doradus (small central red sphere) together with the orbits of Neptune and Uranus, to scale. The yellow ellipses represent the orbits of each planet and the dwarf planet Pluto.

The terametre (SI symbol: Tm) is a unit of length in the metric system equal to 1000000000000 meters (1012 m). 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 Tm – 6.7 au – diameter of the red supergiant Betelgeuse based on multiple angular diameter estimates[186]
  • 1.032 Tm – 6.9 au – diameter of the blue hypergiant Eta Carinae (at optical depth 2/3)[187]
  • 1.079 Tm – 7.2 au – one light-hour
  • 1.114 Tm – 7.5 au – diameter of WOH G64, a star in the Large Magellanic Cloud, which recently transformed from a red hypergiant to a yellow hypergiant[188]
  • 1.4 Tm – 9.5 au – average distance between Saturn and the Sun
  • 1.47 Tm – 9.9 au – diameter of HR 5171 A, a yellow hypergiant star.[189]
  • 1.5 Tm – 10 au – estimated diameter of VV Cephei A, a red hypergiant with a blue dwarf companion.[190]
  • 1.75 Tm – 11.7 au – estimated diameter of Mu Cephei, a red supergiant (possibly hypergiant) among the largest-known stars.[191]
  • 2 Tm – 13.2 au – estimated diameter of VY Canis Majoris, a red hypergiant that is among the largest-known stars[192][193]
  • 2.142 Tm – 14.3 au – estimated diameter of WOH G64, prior to its transformation into a yellow hypergiant.
  • 2.9 Tm – 19.4 au – average distance between Uranus and the Sun
  • 4.4 Tm – 29.4 au – perihelion distance of Pluto
  • 4.5 Tm – 30.1 au – average 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
  • 6.0 Tm – 40.5 au – distance from Earth at which the Pale Blue Dot photograph was taken.
  • 7.3 Tm – 48.8 au – aphelion distance of Pluto
  • 7.5 Tm – 50.1 au – outer boundary of the Kuiper Belt

10 terameters

[edit]
Sedna's orbit (left) is longer than 100 Tm, but other lengths are between 10 and 100 Tm: Comet Hale-Bopp's orbit (lower, faint orange); one light-day (yellow spherical shell with yellow Vernal point arrow as radius); the heliosphere's termination shock (blue shell); and other arrows show positions of Voyager 1 (red) and Pioneer 10 (green). Click on image for larger view and links to other scales.

To help compare different distances this section lists lengths starting at 1013 m (10 Tm or 10 billion km or 67 astronomical units).

  • 10 Tm – 67 AU – diameter of a hypothetical quasi-star
  • 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 – 111.2 AU – distance to Voyager 2 as of May 2016
  • 18 Tm – 123.5 AU – distance between the Sun to the farthest dwarf planet in the Solar System, the Farout 2018 VG18
  • 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 – 141 AU – distance to Voyager 1 as of November 2017
  • 24.8 Tm – 166 AU – distance to Voyager 1 as of November 2024
  • 25.9 Tm – 173 AU – one light-day
  • 30.8568 Tm – 206.3 AU – 1 milliparsec
  • 55.7 Tm – 371 AU – aphelion distance of the comet Hale-Bopp

100 terameters

[edit]
The largest yellow sphere indicates one light month distance from the Sun. Click the image for larger view, more details and links to other scales.

To help compare different distances this section lists lengths starting at 1014 m (100 Tm or 100 billion km or 670 astronomical units).

1 petameter

[edit]
Largest circle with yellow arrow indicates one light-year from Sun; Cat's Eye Nebula on left and Barnard 68 in middle are depicted in front of Comet 1910 A1's orbit. Click image for larger view, details and links to other scales.

The petametre (SI symbol: Pm) is a unit of length in the metric system equal to 1015 meters. To help compare different distances this section lists lengths starting at 1015 m (1 Pm or 1 trillion km or 6685 astronomical units (AU) or 0.11 light-years).

10 petameters

[edit]
Objects with size order of magnitude 1e16m: Ten light-years (94.6 Pm) radius circle with yellow Vernal Point arrow; Bubble Nebula (NGC 7635), left; Dumbbell Nebula (NGC 6853), right; one light-year shell lower right with the smaller Cat's Eye Nebula (NGC_6543) and Barnard 68 adjacent.
1e16m lengths: Ten light-years (94.6 Pm) yellow shell; Sirius below right; BL Ceti below left; Proxima and Alpha Centauri upper right; light-year shell with Comet 1910 A1's orbit inside top right

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
  • 94.6 Pm – 1 light-decade

100 petameters

[edit]
Lengths with order of magnitude 1e17m: yellow Vernal Point arrow traces hundred light-year radius circle with smaller ten light-year circle at right; globular cluster Messier 5 in background; 12 light-year radius Orion Nebula middle right; 50-light-year-wide view of the Carina Nebula bottom left; Pleiades cluster and Bubble nebula with similar diameters each around 10 light-years bottom right; grey arrows show distances from Sun to stars Aldebaran (65 light-years) and Vega (25 light-years)

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[198][199]
  • 240 Pm – 25 light-years – Distance to Vega
  • 260 Pm – 27 light-years – Distance to Chara, a star approximately as bright as the Sun. Its faintness gives an idea how the Sun would appear when viewed from this distance.
  • 308.568 Tm – 32.6 light-years – 1 dekaparsec
  • 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
  • 946 Pm – 1 light-century

1 exameter

[edit]
Lengths with order of magnitude 1e18m: thousand light-year radius circle with yellow arrow and 100 light-year circle at right with globular cluster Messier 5 within and Carina Nebula in front; globular cluster Omega Centauri to left of both; part of the 1,400-light-year-wide Tarantula Nebula fills the background

The exametre (SI symbol: Em) is a unit of length in the metric system equal to 1018 meters. To help compare different distances this section lists lengths between 1018 m (1 Em or 105.7 light-years) and 1019 m (10 Em or 1,057 light-years).

10 exameters

[edit]

To help compare different orders of magnitude, this section lists distances starting at 10 Em (1019 m or 1,100 light-years).

100 exameters

[edit]

To help compare different orders of magnitude, this section lists distances starting at 100 Em (1020 m or 11,000 light-years).

1 zettameter

[edit]

The zettametre (SI symbol: Zm) is a unit of length in the metric system equal to 1021 meters.[56] To help compare different orders of magnitude, this section lists distances starting at 1 Zm (1021 m or 110,000 light-years).

10 zettameters

[edit]

To help compare different orders of magnitude, this section lists distances starting at 10 Zm (1022 m or 1.1 million light-years).

100 zettameters

[edit]

To help compare different orders of magnitude, this section lists distances starting at 100 Zm (1023 m or 11 million light-years).

1 yottameter

[edit]

The yottametre (SI symbol: Ym) is a unit of length in the metric system equal to 1024 meters.[56]

To help compare different orders of magnitude, this section lists distances starting at 1 Ym (1024 m or 105.702 million light-years).

10 yottameters

[edit]
The universe within one billion light-years of Earth

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.

100 yottameters

[edit]

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.

1 ronnameter

[edit]

The ronnametre (SI symbol: Rm) is a unit of length in the metric system equal to 1027 meters.[56]

To help compare different orders of magnitude, this section lists distances starting at 1 Rm (1027 m or 105.7 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.

  • >1 Rm – >105.7 billion light-years – 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.
  • 2.764 Rm - 292.2 billion light-years – circumference of the observable universe, as it is in the shape of a sphere.
  • ≈101010122light-years – the possible size of the universe after cosmological inflation.
  • ≈∞ light-years – theoretical size of the Multiverse if it exists.

See also

[edit]

Notes

[edit]
  1. ^ The diameter of human hair ranges from 17 to 181 μm Ley, Brian (1999). Elert, Glenn (ed.). "Diameter of a human hair". The Physics Factbook. Retrieved 8 December 2018.
  2. ^ 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
  3. ^ 10115 is 1 followed by 115 zeroes, or a googol multiplied by a quadrillion. 1010115 is 1 followed by a quadrillion googol zeroes. 101010122 is 1 followed by 1010122 (a googolplex10 sextillion) zeroes.
  4. ^ But not cloud or high-level fog droplets; droplet size increases with altitude. For a contradictory study indicating larger drop sizes even in ground fog, see Eldridge, Ralph G. (October 1961). "A Few Fog Drop-Size Distributions". Journal of Meteorology. 18 (5): 671–6. Bibcode:1961JAtS...18..671E. doi:10.1175/1520-0469(1961)018<0671:AFFDSD>2.0.CO;2.

References

[edit]
  1. ^ a b c d e Burgess, Cliff; Quevedo, Fernando (November 2007). "The Great Cosmic Roller-Coaster Ride". Scientific American. 297 (5): 55. Bibcode:2007SciAm.297e..52B. doi:10.1038/scientificamerican1107-52 (inactive 2 November 2024). PMID 17990824. Retrieved 1 May 2017.{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
  2. ^ Nave, Carl R. "Cowan and Reines Neutrino Experiment". HyperPhysics. Retrieved 4 December 2008. (6.3 × 10−44 cm2, which gives an effective radius of about 1.42 × 10−22 m)
  3. ^ a b c Nave, Carl R. "Neutron Absorption Cross-sections". HyperPhysics. Retrieved 4 December 2008. (area for 20 GeV about 10 × 10−42 m2 gives effective radius of about 2 × 10−21 m; for 250 GeV about 150 × 10−42 m2 gives effective radius of about 7 × 10−21 m)
  4. ^ Abbott, B. P.; et al. (2016). "Observation of Gravitational Waves from a Binary Black Hole Merger". Physical Review Letters. 116 (6): 061102. arXiv:1602.03837. Bibcode:2016PhRvL.116f1102A. doi:10.1103/PhysRevLett.116.061102. PMID 26918975. S2CID 124959784. 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.
  5. ^ Pohl, R.; et al. (July 2010). "The size of the proton". Nature. 466 (7303): 213–6. Bibcode:2010Natur.466..213P. doi:10.1038/nature09250. PMID 20613837. S2CID 4424731.
  6. ^ a b c d Strassler, Matt (30 May 2013). "The strength of the known forces". profmattstrassler.com.
  7. ^ a b c d Kolena. "The four forces: The strong interaction". Astrophysics Dept website. Duke University.
  8. ^ a b c Nave, Carl R. "Scattering cross section". Retrieved 10 February 2009. (diameter of the scattering cross section of an 11 MeV proton with a target proton)
  9. ^ "CODATA Value: classical electron radius". The NIST Reference on Constants, Units, and Uncertainty. NIST.
  10. ^ H. E. Smith. "The Scale of the Universe". UCSD. Retrieved 10 February 2009. ~10−13cm
  11. ^ Winter, Mark (2008). "WebElements Periodic Table of the Elements / Sulfur / Radii". Retrieved 6 December 2008.
  12. ^ Flahaut E, Bacsa R, Peigney A, Laurent C (June 2003). "Gram-scale CCVD synthesis of double-walled carbon nanotubes" (PDF). Chemical Communications. 12 (12): 1442–3. doi:10.1039/b301514a. PMID 12841282. S2CID 30627446.
  13. ^ "The world's smallest transistor is 1nm long, physics be damned". 6 October 2016.
  14. ^ Stewart, Robert. "Dr". Radiobiology Software. Archived from the original on 30 June 2010. Retrieved 20 May 2015.
  15. ^ Langevin, Dominique (2008). "Chapter 10: DNA-Surfactant/Lipid Complexes at Liquid Interfaces". In Dias, Rita S; Lindman, Bjorn (eds.). DNA Interactions with Polymers and Surfactants. Hoboken, NJ: John Wiley & Sons, Inc. p. 265. doi:10.1002/9780470286364.ch10. ISBN 978-0-470-25818-7. DNA has 20 elementary charges per helical turn over the corresponding length of 3.4nm
  16. ^ Mai-Prochnow, Anne (9 December 2016). "Gram positive and Gram negative bacteria differ in their sensitivity to cold plasma". Scientific Reports. 6. Nature: 38610. Bibcode:2016NatSR...638610M. doi:10.1038/srep38610. PMC 5146927. PMID 27934958.
  17. ^ F., Adnan (17 October 2016). "Samsung announces industry-first mass production of System-on-Chip with 10nm FinFET technology". SamMobile.
  18. ^ "Hard drive basics – Capacities, RPM speeds, interfaces, and mechanics". helpwithpcs.com. Retrieved 13 July 2016.
  19. ^ Cohn, J. University of California, Berkeley Lyman alpha systems and cosmology. Retrieved 21 February 2009.
  20. ^ Seth, S.D.; Seth, Vimlesh (2009). Textbook of Pharmacology (3rd ed.). Elsevier. p. X111. ISBN 978-81-312-1158-8.
  21. ^ Nave, Carl R (2016). "Color". HyperPhysics. Georgia State University.
  22. ^ "Size of bacteria". What are bacteria?. Retrieved 19 July 2016.
  23. ^ Ko, Frank K.; Kawabata, Sueo; Inoue, Mari; Niwa, Masako; Fossey, Stephen; Song, John W. "Engineering properties of spider silk" (PDF). web.mit.edu.
  24. ^ Doohan, Jim. "Blood cells". biosbcc.net. Archived from the original on 23 July 2016. Retrieved 19 July 2016.
  25. ^ a b c d According to The Physics Factbook, the diameter of human hair ranges from 17 to 181 μmLey, Brian (1999). "Width of a Human Hair". The Physics Factbook.
  26. ^ a b Liu Z, Huang AJ, Pflugfelder SC (July 1999). "Evaluation of corneal thickness and topography in normal eyes using the Orbscan corneal topography system". The British Journal of Ophthalmology. 83 (7): 774–8. doi:10.1136/bjo.83.7.774. PMC 1723104. PMID 10381661.
  27. ^ a b Order Siphonaptera – Fleas – BugGuide.Net Accessed 29 April 2014
  28. ^ a b "Official Rules". MLB. Retrieved 30 September 2011.
  29. ^ Bohun B. Kinloch Jr; William H. Scheuner. "Pinus lambertiana". Archived from the original on 8 June 2011. Retrieved 19 January 2017.
  30. ^ a b "What is a rapier – Renaissance swords Rapiers". 2-Clicks Swords.
  31. ^ a b "Robert Wadlow: Tallest man ever". Guinness World Records.
  32. ^ "Animal Records". Smithsonian National Zoological Park. Archived from the original on 23 August 2004.
  33. ^ a b "Niagara Falls Geology Facts & Figures". Niagara Parks Commission. Archived from the original on 19 July 2011. Retrieved 29 June 2011.
  34. ^ a b "Three Gorges Dam". encyclopedia.com. Cengage Learning.
  35. ^ "Exploring Chinese History :: Special Reports :: The Three Gorges Dam Project". www.ibiblio.org.
  36. ^ a b Thomas PC, Parker JW, McFadden LA, Russell CT, Stern SA, Sykes MV, Young EF (September 2005). "Differentiation of the asteroid Ceres as revealed by its shape". Nature. 437 (7056): 224–6. Bibcode:2005Natur.437..224T. doi:10.1038/nature03938. PMID 16148926. S2CID 17758979.
  37. ^ Weintrit, Adam (2013). "So, What is Actually the Distance from the Equator to the Pole? – Overview of the Meridian Distance Approximations". TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation. 7 (2): 259–272. doi:10.12716/1001.07.02.14. ISSN 2083-6473.
  38. ^ "Volvo owner Irv Gordon, who drove 3.2M miles in his P1800, has died". autoblog.com. 16 November 2018. Retrieved 23 January 2021.
  39. ^ Starr, Barry (2 February 2009). "A Long and Winding DNA". KQED. Retrieved 3 July 2024.
  40. ^ "Spacecraft escaping the Solar System". Heavens Above. Archived from the original on 7 October 2018. Retrieved 19 October 2018.
  41. ^ "Twin Keck telescopes probe dual dust disks". (e) Science News. 24 September 2009.
  42. ^ Shiga, David. "Sun's 'twin' an ideal hunting ground for alien life". New Scientist. Retrieved 3 October 2007.
  43. ^ Christian, Eric; Samar, Safi-Harb. "How large is the Milky Way?". Archived from the original on 2 February 1999. Retrieved 14 November 2008.
  44. ^ Duncan, Martin (2008). "16" (PDF). Physics 216 – Introduction to Astrophysics. Archived from the original (PDF) on 17 December 2008. Retrieved 14 November 2008.
  45. ^ "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.
  46. ^ M. López-Corredoira, C. Allende Prieto, F. Garzón, H. Wang, C. Liu and L. Deng (2018). "Disk stars in the Milky Way detected beyond 25 kpc from its center". Astronomy & Astrophysics. 612: L8. arXiv:1804.03064. Bibcode:2018A&A...612L...8L. doi:10.1051/0004-6361/201832880. S2CID 59933365.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  47. ^ Freeman, David (25 May 2018). "The Milky Way galaxy may be much bigger than we thought" (Press release). CNBC.
  48. ^ Martialay, Mary L. (11 March 2015). "The Corrugated Galaxy—Milky Way May Be Much Larger Than Previously Estimated" (Press release). Rensselaer Polytechnic Institute. Archived from the original on 13 March 2015.
  49. ^ Hall, Shannon (4 May 2015). "Size of the Milky Way Upgraded, Solving Galaxy Puzzle". Space.com. Archived from the original on 7 June 2015. Retrieved 9 June 2015.
  50. ^ "The Horologium Supercluster". Atlas of the Universe.
  51. ^ Gott, J. Richard; Jurić, Mario; Schlegel, David; Hoyle, Fiona; Vogeley, Michael; Tegmark, Max; Bahcall, Neta; Brinkmann, Jon (2005). "A Map of the Universe". The Astrophysical Journal. 624 (2): 463. arXiv:astro-ph/0310571. Bibcode:2005ApJ...624..463G. doi:10.1086/428890. S2CID 9654355.
  52. ^ Scott, Douglas; Zibin, J.P. (2006). "How Many Universes Do There Need To Be?". International Journal of Modern Physics D. 15 (12): 2229–2233. arXiv:astro-ph/0605709. Bibcode:2006IJMPD..15.2229S. doi:10.1142/S0218271806009662. S2CID 119437678.
  53. ^ Tegmark, M. (2003). "Parallel universes. Not just a staple of science fiction, other universes are a direct implication of cosmological observations". Scientific American. 288 (5): 40–51. arXiv:astro-ph/0302131. Bibcode:2003SciAm.288e..40T. doi:10.1038/scientificamerican0503-40. PMID 12701329.
  54. ^ Tegmark M (May 2003). "Parallel universes. Not just a staple of science fiction, other universes are a direct implication of cosmological observations". Scientific American. 288 (5): 40–51. arXiv:astro-ph/0302131. Bibcode:2003SciAm.288e..40T. doi:10.1038/scientificamerican0503-40. PMID 12701329.
  55. ^ Page, Don N.; Allende Prieto, C.; Garzon, F.; Wang, H.; Liu, C.; Deng, L. (18 October 2006). "Susskind's challenge to the Hartle Hawking no-boundary proposal and possible resolutions". Journal of Cosmology and Astro-Particle Physics. 2007 (1): 004. arXiv:hep-th/0610199. Bibcode:2007JCAP...01..004P. doi:10.1088/1475-7516/2007/01/004. S2CID 17403084.
  56. ^ a b c d e "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.
  57. ^ Nave, Carl R. "Cowan and Reines Neutrino Experiment". Retrieved 4 December 2008. (6.3×10−44 cm2, which gives an effective radius of about 2×10−23 m)
  58. ^ Christman, J. (2001). "The Weak Interaction" (PDF). Physnet. Michigan State University. Archived from the original (PDF) on 20 July 2011.
  59. ^ Raya, Khépani; Bedolla, Marco A.; Cobos-Martínez, J. J.; Bashir, Adnan (31 October 2017). "Heavy quarkonia in a contact interaction and an algebraic model: mass spectrum, decay constants, charge radii and elastic and transition form factors". Few-Body Systems. 59 (6): 16. arXiv:1711.00383. Bibcode:2018FBS....59..133R. doi:10.1007/s00601-018-1455-y. S2CID 254061694.
  60. ^ Castelvecchi, Davide (11 November 2019). "How Big Is the Proton? Particle-Size Puzzle Leaps Closer to Resolution". Scientific American. Retrieved 3 July 2024.
  61. ^ Pohl, Randolf; Antognini, Aldo; Nez, François; Amaro, Fernando D.; Biraben, François; Cardoso, João M. R.; Covita, Daniel S.; Dax, Andreas; Dhawan, Satish; Fernandes, Luis M. P.; Giesen, Adolf; Graf, Thomas; Hänsch, Theodor W.; Indelicato, Paul; Julien, Lucile; Kao, Cheng-Yang; Knowles, Paul; Le Bigot, Eric-Olivier; Liu, Yi-Wei; Lopes, José A. M.; Ludhova, Livia; Cristina M. B. Monteiro; Mulhauser, Françoise; Nebel, Tobias; Rabinowitz, Paul; 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. S2CID 4424731.
  62. ^ "proton rms charge radius". The NIST Reference on Constants, Units, and Uncertainty.
  63. ^ NIST. CODATA Value: classical electron radius. Retrieved 2009-02-10
  64. ^ ISO 1683:2015
  65. ^ Winter, Mark (2008). "WebElements Periodic Table of the Elements / Hydrogen / radii". Archived from the original on 18 December 2008. Retrieved 6 December 2008.
  66. ^ Winter, Mark (2008). "WebElements Periodic Table of the Elements / Helium / radii". Archived from the original on 19 December 2008. Retrieved 6 December 2008.
  67. ^ Winter, Mark (2008). "WebElements Periodic Table of the Elements / Sulfur / Radii". Archived from the original on 11 December 2008. Retrieved 6 December 2008.
  68. ^ Winter, Mark (2008). "WebElements Periodic Table of the Elements / Periodicity / Van der Waals radius / periodicity". Archived from the original on 19 December 2008. Retrieved 6 December 2008.
  69. ^ "Resolution of an Electron Microscope". Archived from the original on 16 March 2009. Retrieved 25 April 2009.
  70. ^ "Buckminsterfullerene: Molecule of the Month". www.chm.bris.ac.uk. Retrieved 21 April 2019.
  71. ^ Smith, Graham T. (2002). Industrial metrology. Springer. pp. 253. ISBN 978-1-85233-507-6.
  72. ^ Introduction to the Electromagnetic Spectrum and Spectroscopy
  73. ^ 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)
  74. ^ Stryer, Lubert (1988). Biochemistry. San Francisco: W.H. Freeman. ISBN 978-0-7167-1843-7.
  75. ^ "Through the Microscope". www.microbiologytext.com. Archived from the original on 12 June 2016. Retrieved 21 May 2017.
  76. ^ Kojima S, Blair D (2004). The Bacterial Flagellar Motor: Structure and Function of a Complex Molecular Machine. International Review of Cytology. Vol. 233. pp. 93–134. doi:10.1016/S0074-7696(04)33003-2. ISBN 978-0-12-364637-8. PMID 15037363. {{cite book}}: |journal= ignored (help)
  77. ^ "Moore's Law Marches on at Intel". Physorg.com. Retrieved 1 September 2018.
  78. ^ "Hard drive basics – Capacities, RPM speeds, interfaces and mechanics". www.helpwithpcs.com.
  79. ^ Smith, Graham T. (2002). Industrial metrology. Springer. p. 253. ISBN 978-1-85233-507-6.
  80. ^ Eninger, Robert M.; Hogan, Christopher J.; Biswas, Pratim; Adhikari, Atin; Reponen, Tiina; Grinshpun, Sergey A. (2009). "Electrospray versus Nebulization for Aerosolization and Filter Testing with Bacteriophage Particles". Aerosol Science and Technology. 43 (4): 298–304. Bibcode:2009AerST..43..298E. doi:10.1080/02786820802626355. S2CID 93465533.
  81. ^ "Air Pollution [Control] Technology Fact Sheet" (PDF). United States Environmental Protection Agency. Retrieved 3 July 2024.
  82. ^ Seth (18 November 2009). Textbook Of Pharmacology. Elsevier India. ISBN 9788131211588 – via Google Books.
  83. ^ "New Coronavirus (SARS-CoV-2) and the Safety Margins of Plasma Protein Therapies – Plasma Protein Therapeutics Association (PPTA)". Archived from the original on 2 June 2020. Retrieved 30 May 2020.
  84. ^ "NIOSH Guide to the Selection and Use of Particulate Respirators". Centers for Disease Control and Prevention. 1996. Retrieved 3 July 2024.
  85. ^ Spencer RC (March 2003). "Bacillus anthracis". Journal of Clinical Pathology. 56 (3): 182–7. doi:10.1136/jcp.56.3.182. PMC 1769905. PMID 12610093.
  86. ^ Walker K, Skelton H, Smith K (November 2002). "Cutaneous lesions showing giant yeast forms of Blastomyces dermatitidis". Journal of Cutaneous Pathology. 29 (10): 616–8. doi:10.1034/j.1600-0560.2002.291009.x. PMID 12453301. S2CID 39904013.
  87. ^ 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. S2CID 3942426. Archived from the original (PDF) on 6 November 2013. Retrieved 20 May 2012.
  88. ^ "NAC Audio Cassette Glossary – Cassetro". nactape.com. Retrieved 16 March 2018.
  89. ^ "Genes are real things :: DNA from the Beginning". www.dnaftb.org.
  90. ^ Ramel, Gordon. "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 0.00032 inch (0.008 mm) in Nephila)
  91. ^ Wise, R.R.; Hoober, J.K. (2007). The Structure and Function of Plastids. Springer. p. 14. ISBN 978-1-4020-6570-5.
  92. ^ Zak, J. Allen (April 1994). Drop Size Distributions and Related Properties of Fog for Five Locations Measured From Aircraft (PDF) (Report). Hampton, VA: NASA – Langley Research Center. 4585.
  93. ^ a b IST – Innovative Sintering Technologies Ltd. "Fibreshape applications". Retrieved 4 December 2008. Histogram of cotton thickness
  94. ^ "Company Profile, page 20" (PDF). The Lego Group. 2010. Archived from the original (PDF) on 9 December 2012.
  95. ^ Lippmann, Morton (2000). Environmental Toxicants: Human Exposures and Their Health Effects. John Wiley and Sons. p. 453. ISBN 978-0-471-29298-2. Retrieved 4 December 2008. 20 μm .. 5 μm
  96. ^ Rossi, Massimiliano (27 November 2017). "Kinematics of flagellar swimming in Euglena gracilis: Helical trajectories and flagellar shapes". Proceedings of the National Academy of Sciences of the United States of America. 114 (50): 13085–13090. Bibcode:2017PNAS..11413085R. doi:10.1073/pnas.1708064114. hdl:11384/84166. PMC 5740643. PMID 29180429.
  97. ^ "Apple – iPhone 4S – See everything clearly with the Retina display". Apple Inc. Official Website. Apple Inc. Retrieved 10 March 2012.
  98. ^ Gyllenbok, Jan (2018). Encyclopedia of Historical Metrology, Weights, and Measures. Birkhäuser. ISBN 9783319575988.
  99. ^ 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.
  100. ^ a b Comité International des Poids et Mesures (1935), Procès-Verbaux des Séances (in French), vol. 17 (2 ed.), Paris, France: Gauthier-Villars, imprimeur-libraire du Bureau des Longitudes, de l'École Polytechnique, p. 76
  101. ^ a b Roberts, Richard W. (1 June 1975). Metric System of Weights and Measures – Guidelines for Use. US: Director of the National Bureau of Standards. Federal Register FR Doc.75-15798 (18 June 1975). 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).
  102. ^ a b Judson, Lewis V. (1 October 1976) [1963]. "Appendix 7" (PDF). In Barbrow, Louis E. (ed.). Weights and Measures Standards of the United States, a brief history. Derived from a prior work by Louis A. Fisher (1905). US: US Department of Commerce, National Bureau of Standards. p. 33. LCCN 76-600055. NBS Special Publication 447; NIST SP 447; 003-003-01654-3. Archived from the original (PDF) on 4 March 2016. Retrieved 12 October 2015.
  103. ^ Lindemann, Charles. "Sperm Facts". Dr. Charles Lindmann's Lab. Oakland University.
  104. ^ Popiolek, Kim. "Dr. Charles Lindemann's Lab: Sperm Facts". Oakland University.
  105. ^ Santoso, Alex (17 June 2006). "World's Biggest Sperm Belongs to a Tiny Fly". Neatorama.
  106. ^ Lyon, William F. "House Dust Mites". Ohio State University Extension. HYG-2157-97. Archived from the original on 2 November 2001.
  107. ^ Rodgers, Steven. "Designing and Operating Electrostatically Driven Microengines" (PDF). Sandia National Laboratory. Retrieved 3 July 2024.
  108. ^ "CNN – Scientists discover biggest bacteria ever – April 15, 1999". www.cnn.com. Retrieved 20 May 2017.
  109. ^ "World's Smallest Frog Found—Fly-Size Beast Is Tiniest Vertebrate". 13 January 2017. Archived from the original on 13 January 2012. Retrieved 20 May 2017.
  110. ^ 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
  111. ^ "World's smallest vertebrate has a big secret". New Scientist. Retrieved 20 May 2017.
  112. ^ Lindstrom, Hannah. "The Smallest Salamander". Mongabay.com. Retrieved 20 May 2017.
  113. ^ "Comparing quail eggs". BackYard Chickens. Retrieved 20 May 2017.
  114. ^ "Why the Moon is getting further away from Earth". BBC News. 1 February 2011. Retrieved 5 November 2021.
  115. ^ "USGA: Guide to the Rules on Clubs and Balls". USGA. Retrieved 30 September 2011.
  116. ^ "CR80 Card Specification". CardLogix Corporation. Retrieved 3 July 2024.
  117. ^ "Credit Card Dimensions". Retrieved 30 September 2011.
  118. ^ Kinloch, Bohun B. Jr. & Scheuner, William H. "Pinus lambertiana". Archived from the original on 8 June 2011. Retrieved 1 May 2017.
  119. ^ "HTwins.net – The Scale of the Universe". htwins.net. Archived from the original on 29 November 2010. Retrieved 20 May 2017.
  120. ^ a b Laws of the Game (PDF), FIFA, 1 June 2017, archived from the original (PDF) on 13 November 2017, retrieved 21 March 2018
  121. ^ IAAF International Association of Athletics Federations – IAAF.org - Statistics - Top Lists, archived from the original on 16 January 2008, retrieved 9 April 2010
  122. ^ IAAF International Association of Athletics Federations – IAAF.org - Past Results, archived from the original on 4 June 2011, retrieved 9 April 2010
  123. ^ Dagg, A. I. (1971), Mammalian Species 5 (Giraffa camelopardalis ed.), pp. 1–8
  124. ^ "Fossil of 'largest flying bird' identified". BBC News. 7 July 2014. Retrieved 19 July 2022.
  125. ^ Plait, P. (6 October 2008). "Incoming!!!". Bad Astronomy. Archived from the original on 7 October 2008. Retrieved 8 October 2008.
  126. ^ "Rule 1.04 The Playing Field" (PDF). Official Baseball Rules. Major League Baseball. 25 January 2010. pp. 1–5. Archived (PDF) from the original on 27 April 2011. Retrieved 1 April 2011. See especially Diagram No. 1, page 3.
  127. ^ "Law 7 (The pitch)". Laws of Cricket. Marylebone Cricket Club. October 2010. Archived from the original on 14 May 2011. Retrieved 1 April 2011.
  128. ^ "Animal Records". Smithsonian National Zoological Park. Archived from the original on 28 March 2009. Retrieved 29 May 2007.
  129. ^ Curtice, Brian (2021). "New Dry Mesa Dinosaur Quarry Supersaurus vivianae (Jensen 1985) axial elements provide additional insight into its phylogenetic relationships and size, suggesting an animal that exceeded 39 meters in length" (PDF).
  130. ^ "Longest Animal". Guinness World Records. Retrieved 15 June 2019.
  131. ^ "Driver Location Signs – Frequently Asked Questions". Highways Agency. Archived from the original on 10 August 2012. Retrieved 10 February 2010.
  132. ^ "Kingda Ka (Six Flags Great Adventure)". Archived from the original on 26 March 2009. Retrieved 18 April 2009.
  133. ^ "Eiffel Tower grows six metres after new antenna attached". Reuters. 15 March 2022.
  134. ^ Campbell, Marilyn (17 February 2018). "How Tall is the CN Tower?". TripSavvy. Retrieved 20 May 2017.
  135. ^ "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.
  136. ^ "Tallest tree in the world: coast redwood". Monumental Trees, an inventory of big and old trees worldwide.
  137. ^ Fujiwara A, Kawaguchi J, Yeomans DK, Abe M, Mukai T, Okada T, Saito J, Yano H, Yoshikawa M, Scheeres DJ, Barnougin-Jha O, Cheng AF, Demura H, Gaskell RW, Hirata N, Ikeda H, Kominato T, Miyamoto H, Nakamura AM, Nakamura R, Sasaki S, Uesugi K (June 2006). "The rubble-pile asteroid Itokawa as observed by Hayabusa". Science. 312 (5778): 1330–4. Bibcode:2006Sci...312.1330F. doi:10.1126/science.1125841. PMID 16741107. S2CID 206508294.
  138. ^ "long wave". Oxford Dictionaries. Archived from the original on 1 March 2019. Retrieved 12 March 2011. wavelength above one kilometre (and a frequency below 300 kHz)
  139. ^ "Bridge Design and Construction Statistics". Golden Gate Bridge. Archived from the original on 14 June 2012. Retrieved 10 June 2012.
  140. ^ "nautical mile". Merriam-Webster.com Dictionary. Merriam-Webster. Retrieved 12 March 2011.
  141. ^ Akashi Kaikyo Bridge @ Everything2.com, Everything2, 9 September 2002, retrieved 19 April 2009
  142. ^ Friedl, Jeffrey (9 December 2008), Supporting the Longest Suspension Bridge in the World, archived from the original on 3 March 2009, retrieved 19 April 2009
  143. ^ New height of world's railway born in Tibet, Xinhua News Agency, 24 August 2005, archived from the original on 3 June 2009, retrieved 19 April 2009
  144. ^ "Aucanquilcha 6176m". Andes. Retrieved 3 July 2024.
  145. ^ "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
  146. ^ "Kosciuszko National Park lookouts and scenery". Office of Environment & Heritage: NSW National Parks & Wildlife Service.
  147. ^ "Carstensz Pyramid details". Carstensz Pyramid Site. Archived from the original on 16 December 2014.
  148. ^ 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. (Website based on Alte Meß- und Währungssysteme aus dem deutschen Sprachgebiet, ISBN 3-7686-1036-5)
  149. ^ 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.
  150. ^ Brewster, David (1832). The Edinburgh Encyclopaedia. Vol. 12 (1st American ed.). Joseph and Edward Parker. Retrieved 9 October 2015.
  151. ^ Dingler, Johann Gottfried (1823). Polytechnisches Journal (in German). Vol. 11. Stuttgart, Germany: J.W. Gotta'schen Buchhandlung. Retrieved 9 October 2015.
  152. ^ Haugen, Einar, Norwegian English Dictionary, 1965, Oslo: Universitetsforlaget and Madison: University of Wisconsin Press, s.v. mil
  153. ^ "What is a farsakh or farsang?". sizes.com.
  154. ^ "IAAF Competition Rules 2008" (PDF). IAAF. p. 195. Archived (PDF) from the original on 25 March 2009. Retrieved 20 April 2009.
  155. ^ Kennedy, Gregory. "Stratolab, an Evolutionary Stratospheric Balloon Project".
  156. ^ Wise, Jeff (1 October 2009). "Turkey Building the World's Deepest Immersed Tube Tunnel". Popular Mechanics. Retrieved 1 May 2017.
  157. ^ "Facts and History about the Panama Canal". Archived from the original on 14 March 2016.
  158. ^ Highest and lowest points on Mars Archived 31 January 2016 at the Wayback Machine NASA
  159. ^ Plescia, Jeff (1 October 1997). "Height of Martian vs. Earth mountains". Questions and Answers about Mars terrain and geology. Archived from the original on 14 October 2008. Retrieved 20 April 2009.
  160. ^ "High Speed 1 Project Hoem". www.betchel.com. Betchel Corporation. Retrieved 8 February 2015.
  161. ^ "Bordeaux-Paris | the event". www.bordeauxparis.com. Archived from the original on 28 March 2017. Retrieved 30 April 2017.
  162. ^ "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
  163. ^ 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 24 May 2024. Retrieved 31 August 2009.
  164. ^ "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.
  165. ^ CIS railway timetable, route No. 002, Moscow-Vladivostok. Archived 3 December 2009.
  166. ^ CIS railway timetable, route No. 350, Kyiv-Vladivostok. Archived 3 December 2009.
  167. ^ McGourty, Christine (14 December 2005). "Hubble finds mass of white dwarf". BBC News. Retrieved 13 October 2007.
  168. ^ NASA Staff (10 May 2011). "Solar System Exploration – Earth's Moon: Facts & Figures". NASA. Archived from the original on 7 November 2011. Retrieved 6 November 2011.
  169. ^ "Sun Fact Sheet". nssdc.gsfc.nasa.gov.
  170. ^ Sun Fact Sheet
  171. ^ Akeson, Rachel; Beichman, Charles; Kervella, Pierre; Fomalont, Edward; Benedict, G. Fritz (2021). "Precision Millimeter Astrometry of the α Centauri AB System". The Astronomical Journal. 162 (1): 14. arXiv:2104.10086. Bibcode:2021AJ....162...14A. doi:10.3847/1538-3881/abfaff.
  172. ^ Liebert, James; Young, Patrick A.; Arnett, David; Holberg, J. B.; Williams, Kurtis A. (2005). "The Age and Progenitor Mass of Sirius B". The Astrophysical Journal. 630 (1): L69–L72. arXiv:astro-ph/0507523. Bibcode:2005ApJ...630L..69L. doi:10.1086/462419. S2CID 8792889.
  173. ^ Neuroscience: The Science of the Brain"IBRO Brain Campaign". Archived from the original on 2 February 2011. Retrieved 8 June 2011. p.44
  174. ^ Yoon, Jinmi; Peterson, Deane M.; Kurucz, Robert L.; Zagarello, Robert J. (2010). "A New View of Vega's Composition, Mass, and Age". The Astrophysical Journal. 708 (1): 71–79. Bibcode:2010ApJ...708...71Y. doi:10.1088/0004-637X/708/1/71. S2CID 120986935.
  175. ^ Tkachenko, A.; et al. (May 2016), "Stellar modelling of Spica, a high-mass spectroscopic binary with a β Cep variable primary component", Monthly Notices of the Royal Astronomical Society, 458 (2): 1964–1976, arXiv:1601.08069, Bibcode:2016MNRAS.458.1964T, doi:10.1093/mnras/stw255, S2CID 26945389
  176. ^ a b Baines, Ellyn K.; Armstrong, J. Thomas; Schmitt, Henrique R.; Zavala, R. T.; Benson, James A.; Hutter, Donald J.; Tycner, Christopher; Belle, Gerard T. van (2017). "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109. Bibcode:2018AJ....155...30B. doi:10.3847/1538-3881/aa9d8b.
  177. ^ a b Howes, Louise M.; Lindegren, Lennart; Feltzing, Sofia; Church, Ross P.; Bensby, Thomas (1 February 2019). "Estimating stellar ages and metallicities from parallaxes and broadband photometry: successes and shortcomings". Astronomy & Astrophysics. 622: A27. arXiv:1804.08321. Bibcode:2019A&A...622A..27H. doi:10.1051/0004-6361/201833280. ISSN 0004-6361.
  178. ^ Ramírez, I.; Allende Prieto, C. (2011). "Fundamental Parameters and Chemical Composition of Arcturus". The Astrophysical Journal. 743 (2): 135. arXiv:1109.4425. Bibcode:2011ApJ...743..135R. doi:10.1088/0004-637X/743/2/135. S2CID 119186472.
  179. ^ Richichi, A.; Roccatagliata, V.; Shultz, Matt; Williamson, Michael H.; Moya, Andres (2005). "Aldebaran's angular diameter: How well do we know it?". Astronomy & Astrophysics. 433 (1): 305–312. arXiv:astro-ph/0502181. Bibcode:2005A&A...433..305R. doi:10.1051/0004-6361:20041765. S2CID 119414301. They 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.
  180. ^ Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W.; Handler, G.; Moffat, A. F. J.; Pigulski, A.; Popowicz, A.; Wade, G. A.; Zwintz, K. (April 2019). "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE - Constellation". Astronomy & Astrophysics. 624: A35. arXiv:1902.07531. doi:10.1051/0004-6361/201834514. ISSN 0004-6361.
  181. ^ McDonald, Iain; Zijlstra, Albert A.; Watson, Robert A. (11 October 2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. doi:10.1093/mnras/stx1433. ISSN 0035-8711.
  182. ^ Chesneau, O.; Dessart, L.; Mourard, D.; Bério, Ph.; Buil, Ch.; Bonneau, D.; Borges Fernandes, M.; Clausse, J. M.; Delaa, O.; Marcotto, A.; Meilland, A.; Millour, F.; Nardetto, N.; Perraut, K.; Roussel, A.; Spang, A.; Stee, P.; Tallon-Bosc, I.; McAlister, H.; Ten Brummelaar, T.; Sturmann, J.; Sturmann, L.; Turner, N.; Farrington, C.; Goldfinger, P. J. (2010). "Time, spatial, and spectral resolution of the H α line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer". Astronomy and Astrophysics. 521: A5. arXiv:1007.2095. Bibcode:2010A&A...521A...5C. doi:10.1051/0004-6361/201014509. S2CID 10340205.
  183. ^ Woodruff, H. C.; Eberhardt, M.; Driebe, T.; Hofmann, K.-H.; Ohnaka, K.; Richichi, A.; Schertl, D.; Schoeller, M.; Scholz, M.; Weigelt, G.; Wittkowski, M.; Wood, P. R. (July 2004). "Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared". Astronomy & Astrophysics. 421 (2): 703–714. arXiv:astro-ph/0404248. Bibcode:2004A&A...421..703W. doi:10.1051/0004-6361:20035826. ISSN 0004-6361.
  184. ^ Lau, R. M.; Herter, T. L.; Morris, M. R.; Adams, J. D. (2014). "Nature Versus Nurture: Luminous Blue Variable Nebulae in and Near Massive Stellar Clusters at the Galactic Center". The Astrophysical Journal. 785 (2): 120. arXiv:1403.5298. Bibcode:2014ApJ...785..120L. doi:10.1088/0004-637X/785/2/120. S2CID 118447462.
  185. ^ Anugu, Narsireddy; Baron, Fabien; Monnier, John D.; Gies, Douglas R.; Roettenbacher, Rachael M.; Schaefer, Gail H.; Montargès, Miguel; Kraus, Stefan; Bouquin, Jean-Baptiste Le (5 August 2024). "CHARA Near-Infrared Imaging of the Yellow Hypergiant Star $\rho$ Cassiopeiae: Convection Cells and Circumstellar Envelope". arXiv:2408.02756v2 [astro-ph.SR].
  186. ^ Joyce, Meridith; Leung, Shing-Chi; Molnár, László; Ireland, Michael; Kobayashi, Chiaki; Nomoto, Ken'Ichi (2020). "Standing on the Shoulders of Giants: New Mass and Distance Estimates for Betelgeuse through Combined Evolutionary, Asteroseismic, and Hydrodynamic Simulations with MESA". The Astrophysical Journal. 902 (1): 63. arXiv:2006.09837. Bibcode:2020ApJ...902...63J. doi:10.3847/1538-4357/abb8db.
  187. ^ Gull, Theodore R.; Hillier, D. John; Hartman, Henrik; Corcoran, Michael F.; Damineli, Augusto; Espinoza-Galeas, David; Hamaguchi, Kenji; Navarete, Felipe; Nielsen, Krister; Madura, Thomas; Moffat, Anthony F. J.; Morris, Patrick; Richardson, Noel D.; Russell, Christopher M. P.; Stevens, Ian R. (July 2022). "Eta Carinae: An Evolving View of the Central Binary, Its Interacting Winds and Its Foreground Ejecta". The Astrophysical Journal. 933 (2): 175. arXiv:2205.15116. Bibcode:2022ApJ...933..175G. doi:10.3847/1538-4357/ac74c2. ISSN 0004-637X.
  188. ^ Munoz-Sanchez, G.; Kalitsounaki, M.; Wit, S. de; Antoniadis, K.; Bonanos, A. Z.; Zapartas, E.; Boutsia, K.; Christodoulou, E.; Maravelias, G. (2 December 2024), The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant, doi:10.48550/arXiv.2411.19329, retrieved 8 December 2024
  189. ^ van Genderen, A. M.; Lobel, A.; Nieuwenhuijzen, H.; Henry, G. W.; De Jager, C.; Blown, E.; Di Scala, G.; Van Ballegoij, E. J. (2019). "Pulsations, eruptions, and evolution of four yellow hypergiants". Astronomy and Astrophysics. 631: A48. arXiv:1910.02460. Bibcode:2019A&A...631A..48V. doi:10.1051/0004-6361/201834358. S2CID 203836020.
  190. ^ Bauer, W. H.; Gull, T. R.; Bennett, P. D. (2008). "Spatial Extension in the Ultraviolet Spectrum of Vv Cephei". The Astronomical Journal. 136 (3): 1312. Bibcode:2008AJ....136.1312H. doi:10.1088/0004-6256/136/3/1312. S2CID 119404901.
  191. ^ Table 4 in Emily M. Levesque; Philip Massey; K. A. G. Olsen; Bertrand Plez; Eric Josselin; Andre Maeder & Georges Meynet (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal. 628 (2): 973–985. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901. S2CID 15109583.
  192. ^ Shenoy, Dinesh; Humphreys, Roberta M.; Jones, Terry J.; Marengo, Massimo; Gehrz, Robert D.; Helton, L. Andrew; Hoffmann, William F.; Skemer, Andrew J.; Hinz, Philip M. (2016). "SEARCHING FOR COOL DUST IN THE MID-TO-FAR INFRARED: THE MASS-LOSS HISTORIES OF THE HYPERGIANTS μ Cep, VY CMa, IRC+10420, AND ρ Cas". The Astronomical Journal. 151 (3): 51. arXiv:1512.01529. Bibcode:2016AJ....151...51S. doi:10.3847/0004-6256/151/3/51.
  193. ^ 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. S2CID 54044968.
  194. ^ Parthasarathy, M. (2000). "Birth and early evolution of planetary nebulae". Bulletin of the Astronomical Society of India. 28: 217–224. Bibcode:2000BASI...28..217P.
  195. ^ 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)
  196. ^ Reed, Darren S.; Balick, Bruce; Hajian, Arsen R.; Klayton, Tracy L.; Giovanardi, Stefano; Casertano, Stefano; Panagia, Nino; Terzian, Yervant (1999). "Hubble Space Telescope Measurements of the Expansion of NGC 6543: Parallax Distance and Nebular Evolution". Astronomical Journal. 118 (5): 2430–2441. arXiv:astro-ph/9907313. Bibcode:1999AJ....118.2430R. doi:10.1086/301091. S2CID 14746840.
  197. ^ Szpir, Michael (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
  198. ^ 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. S2CID 18192326.
  199. ^ diameter=sin(65 arcminutes)*1270 light-years=24; where "65.00 × 60.0 (arcmin)" sourced from Revised NGC Data for NGC 1976
  200. ^ distance × sin( diameter_angle ), using distance of 5kpc (15.8 ± 1.1 kly) and angle 36.3', = 172 ± 12.5 ly.
  201. ^ van de Ven, G.; van den Bosch, R. C. E.; Verolme, E. K.; de Zeeuw, P. T. (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. S2CID 15538249. best-fit dynamical distance D=4.8±0.3 kpc ... consistent with the canonical value 5.0±0.2 kpc obtained by photometric methods
  202. ^ 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. S2CID 18759600. Vizier catalog entry
  203. ^ Neuhäuser, R; Torres, G; Mugrauer, M; Neuhäuser, D L; Chapman, J; Luge, D; Cosci, M (29 July 2022). "Colour evolution of Betelgeuse and Antares over two millennia, derived from historical records, as a new constraint on mass and age". Monthly Notices of the Royal Astronomical Society. 516 (1): 693–719. arXiv:2207.04702. doi:10.1093/mnras/stac1969. ISSN 0035-8711.
  204. ^ Harris, Hugh C.; Dahn, Conard C.; Canzian, Blaise; Guetter, Harry H.; et al. (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. S2CID 18261027.
  205. ^ 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 (1): 137–148. arXiv:0902.3913. Bibcode:2009ApJ...700..137R. doi:10.1088/0004-637X/700/1/137. S2CID 11347166.
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