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Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma-ray astronomy.^[1] Ultraviolet light is not visible to the human eye.^[2] Most of the light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space.^[1]

Overview

Ultraviolet line spectrum measurements (spectroscopy) are used to discern the chemical composition, densities, and temperatures of the interstellar medium, and the temperature and composition of hot young stars. UV observations can also provide essential information about the evolution of galaxies. They can be used to discern the presence of a hot white dwarf or main sequence companion in orbit around a cooler star.^[3]^[4]

The ultraviolet universe looks quite different from the familiar stars and galaxies seen in visible light. Most stars are actually relatively cool objects emitting much of their electromagnetic radiation in the visible or near-infrared part of the spectrum. Ultraviolet radiation is the signature of hotter objects, typically in the early and late stages of their evolution. In the Earth's sky seen in ultraviolet light, most stars would fade in prominence. Some very young massive stars and some very old stars and galaxies, growing hotter and producing higher-energy radiation near their birth or death, would be visible. Clouds of gas and dust would block the vision in many directions along the Milky Way.

Space-based solar observatories such as SDO and SOHO use ultraviolet telescopes (called AIA and EIT, respectively) to view activity on the Sun and its corona. Weather satellites such as the GOES-R series also carry telescopes for observing the Sun in ultraviolet.

The Hubble Space Telescope and FUSE have been the most recent major space telescopes to view the near and far UV spectrum of the sky, though other UV instruments have flown on smaller observatories such as GALEX, as well as sounding rockets and the Space Shuttle.

Pioneers in ultraviolet astronomy include George Robert Carruthers, Robert Wilson, and Charles Stuart Bowyer.

Ultraviolet space telescopes

- Far Ultraviolet Camera/Spectrograph on Apollo 16 (April 1972)
+ ESRO - TD-1A (135-286 nm; 1972–1974)
- Orbiting Astronomical Observatory (#2:1968-73. #3:1972-1981)
- Orion 1 and Orion 2 Space Observatories (#1: 200-380 nm, 1971; #2: 200-300 nm, 1973)
+ - Astronomical Netherlands Satellite (150-330 nm, 1974–1976)
+ - International Ultraviolet Explorer (115-320 nm, 1978–1996)
- Astron-1 (150-350 nm, 1983–1989)
- Glazar 1 and 2 on Mir (in Kvant-1, 1987–2001)
- FAUST (140-180 nm, in ATLAS-1 Spacelab aboard STS-45 mission, March 1992)^[5]
- EUVE (7-76 nm, 1992–2001)
- FUSE (90.5-119.5 nm, 1999–2007)
+ - Extreme ultraviolet Imaging Telescope (on SOHO imaging Sun at 17.1, 19.5, 28.4, and 30.4 nm)
+ - Hubble Space Telescope (various 115-800 nm,1990-1997-) (STIS 115–1030 nm, 1997–) (WFC3 200-1700 nm, 2009–)
- Swift Gamma-Ray Burst Mission (170–650 nm, 2004- )
- Hopkins Ultraviolet Telescope (flew in 1990 and 1995)
- ROSAT XUV^[6] (17-210eV) (30-6 nm, 1990–1999)
- Far Ultraviolet Spectroscopic Explorer (90.5-119.5 nm, 1999–2007)
- Galaxy Evolution Explorer (135–280 nm, 2003–2012)
- Hisaki (130-530 nm, 2013 - 2023)
- Lunar-based ultraviolet telescope (LUT) (on Chang'e 3 lunar lander, 245-340 nm, 2013 -)
- Astrosat (130-530 nm, 2015 -)
- Colorado Ultraviolet Transit Experiment - (255-330 nm spectrograph, 2021- )
- PROBA-3 (CUTE) - (530-588 nm coronagraph, 2024- )
- Public Telescope (PST)^[7] (100-180 nm, Proposed 2015, EU funded study )
- Viewpoint-1 SpaceFab.US (200-950 nm, Launch planned 2022)^[8]

Ultraviolet instruments on planetary spacecraft

- UVIS (Cassini) - 1997 (at Saturn from 2004 to 2017)
- MASCS (MESSENGER) - 2004 (at Mercury from 2011 to 2015)
- Alice (New Horizons) - 2006 (Pluto flyby in 2015)
- UVS (Juno) - 2011 (at Jupiter since 2016)
- IUVS (MAVEN) - 2013 (at Mars since 2014)

References

^ ^a ^b A. N. Cox, ed. (2000). Allen's Astrophysical Quantities. New York: Springer-Verlag. ISBN 0-387-98746-0.
^ "Ultraviolet Light". Archived from the original on 2017-02-13. Retrieved 2017-02-12.
^ Reimers, D. (July 1984). "Discovery of a white dwarf companion of the "hybrid" K giant HD 81817". Astronomy and Astrophysics. 136: L5–L6. Bibcode:1984A&A...136L...5R.
^ Ortiz, Roberto; Guerrero, Martín A. (September 2016). "Ultraviolet emission from main-sequence companions of AGB stars". Monthly Notices of the Royal Astronomical Society. 461 (3): 3036–3046. arXiv:1606.09086. Bibcode:2016MNRAS.461.3036O. doi:10.1093/mnras/stw1547.
^ Lampton, M., Sasseen, T. P., Wu, X., & Bowyer, S. (1993). "A study of the impact of the space shuttle environment on faint far-UV geophysical and astronomical phenomena". Geophysical Research Letters. 20 (6): 539–542. Bibcode:1993GeoRL..20..539L. doi:10.1029/93GL00093.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ R. Staubert, H. Brunner,1 H.-C. Kreysing - The German ROSAT XUV Data Center and a ROSAT XUV Pointed Phase Source Catalogue (1996)
^ Ein privates Weltraumteleskope für Amateure und Profis Spektrum DE. June 2015
^ "Space Telescopes".

External links

Media related to Ultraviolet astronomy at Wikimedia Commons

[cox2000-1] A. N. Cox, ed. (2000). Allen's Astrophysical Quantities. New York: Springer-Verlag. ISBN 0-387-98746-0.

[2] "Ultraviolet Light". Archived from the original on 2017-02-13. Retrieved 2017-02-12.

[Reimers1984-3] Reimers, D. (July 1984). "Discovery of a white dwarf companion of the "hybrid" K giant HD 81817". Astronomy and Astrophysics. 136: L5–L6. Bibcode:1984A&A...136L...5R.

[Ortiz2016-4] Ortiz, Roberto; Guerrero, Martín A. (September 2016). "Ultraviolet emission from main-sequence companions of AGB stars". Monthly Notices of the Royal Astronomical Society. 461 (3): 3036–3046. arXiv:1606.09086. Bibcode:2016MNRAS.461.3036O. doi:10.1093/mnras/stw1547.

[5] Lampton, M., Sasseen, T. P., Wu, X., & Bowyer, S. (1993). "A study of the impact of the space shuttle environment on faint far-UV geophysical and astronomical phenomena". Geophysical Research Letters. 20 (6): 539–542. Bibcode:1993GeoRL..20..539L. doi:10.1029/93GL00093.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[6] R. Staubert, H. Brunner,1 H.-C. Kreysing - The German ROSAT XUV Data Center and a ROSAT XUV Pointed Phase Source Catalogue (1996)

[7] Ein privates Weltraumteleskope für Amateure und Profis Spektrum DE. June 2015

[8] "Space Telescopes".

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@@ Line 1: / Line 1: @@
+{{short description|Observation of electromagnetic radiation at ultraviolet wavelengths}}
-{{Unreferenced|date=June 2007}}
+[[Image:M81 wide Galex.jpg|thumb|A [[GALEX]] image of the [[spiral galaxy]] [[Messier 81]] in [[ultraviolet]] light.  Credit:GALEX/[[NASA]]/[[JPL]]-[[Caltech]].]]
+'''Ultraviolet astronomy''' is the observation of [[electromagnetic radiation]] at [[ultraviolet]] wavelengths between approximately 10 and 320 [[nanometre]]s; shorter wavelengths&mdash;higher energy photons&mdash;are studied by [[X-ray astronomy]] and [[gamma-ray astronomy]].<ref name="cox2000">{{cite book
-'''UV astronomy''' is the branch of [[astronomy]] and [[astrophysics]] which deals with objects visible in [[ultraviolet]] (UV) radiation.
+  | editor=A. N. Cox
+  | title=Allen's Astrophysical Quantities
+  | date=2000
+  | publisher=Springer-Verlag
+  | location=New York
+  | isbn=0-387-98746-0}}</ref> Ultraviolet light is not visible to the [[human eye]].<ref>{{cite web|url=https://science.ksc.nasa.gov/mirrors/msfc/description/ultraviolet.html|title=Ultraviolet Light|archive-url=https://web.archive.org/web/20170213163854/https://science.ksc.nasa.gov/mirrors/msfc/description/ultraviolet.html|archive-date=2017-02-13|access-date=2017-02-12}}</ref> Most of the light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space.<ref name="cox2000"/>
+==Overview==
-UV radiation ranges approximatively from 10nm (10^-8) (extreme UV) to 380nm (near UV).
+{{Globalize|2=US|date=September 2024}}
+Ultraviolet [[Spectral line|line spectrum]] measurements ([[Astronomical spectroscopy|spectroscopy]]) are used to discern the chemical composition, densities, and temperatures of the [[interstellar medium]], and the temperature and composition of hot young stars. UV observations can also provide essential information about the [[Galaxy formation and evolution|evolution of galaxies]]. They can be used to discern the presence of a hot [[white dwarf]] or [[main sequence]] companion in orbit around a cooler star.<ref name=Reimers1984/><ref name=Ortiz2016/>
+The ultraviolet [[universe]] looks quite different from the familiar [[star]]s and [[galaxy|galaxies]] seen in [[visible light]].
-Ultraviolet line spectrum measurements are used to discern the chemical composition, densities, and temperatures of [[interstellar medium]], and the temperature and composition of hot young stars.
+Most stars are actually relatively cool objects emitting much of their electromagnetic radiation in the visible or near-[[infrared]] part of the spectrum. Ultraviolet radiation is the signature of hotter objects, typically in the early and late stages of their [[stellar evolution|evolution]]. In the Earth's sky seen in ultraviolet light, most stars would fade in prominence. Some very young massive stars and some very old stars and galaxies, growing hotter and producing higher-energy radiation near their birth or death, would be visible. Clouds of gas and dust would block the vision in many directions along the [[Milky Way]].
-UV observations can also provide essential information about the [[Galaxy formation and evolution|evolution of galaxies]].
+Space-based solar observatories such as [[Solar Dynamics Observatory|SDO]] and [[Solar and Heliospheric Observatory|SOHO]] use ultraviolet telescopes (called [[Solar Dynamics Observatory#Atmospheric Imaging Assembly (AIA)|AIA]] and [[Extreme ultraviolet Imaging Telescope|EIT]], respectively) to view activity on the Sun and its [[solar corona|corona]]. Weather satellites such as the [[Geostationary Operational Environmental Satellite|GOES-R]] series also carry [[GOES-16#Sun-facing|telescopes]] for observing the Sun in ultraviolet.
-The ultraviolet [[Universe]] looks quite different from the familiar [[star]]s and [[galaxy|galaxies]] seen in [[visible light]].
-Most stars are actually relatively cool objects emitting much of their electromagnetic radiation in the visible part of the spectrum. Ultraviolet radiation is the signature of hotter objects, typically in the early and late stages of their [[stellar evolution|evolution]].
-If we  could see the sky in ultraviolet light, most stars would fade in prominence. We would see some very young massive stars and some very old stars and galaxies, growing hotter and producing higher-energy radiation near their birth or death. Clouds of gas and dust would block our vision in many directions along the [[Milky Way]].
+The [[Hubble Space Telescope]] and [[Far Ultraviolet Spectroscopic Explorer|FUSE]] have been the most recent major [[space telescope]]s to view the near and far UV [[Electromagnetic spectrum|spectrum]] of the sky, though other UV instruments have flown on smaller observatories such as [[GALEX]], as well as [[sounding rockets]] and the [[Space Shuttle]].
-Scientists classify UV astronomy as part of [[optical astronomy]] as optical components (mirrors, lenses and solid state digital detectors) are usually used.
+Pioneers in ultraviolet astronomy include [[George Robert Carruthers]], [[Robert Wilson (astronomer)|Robert Wilson]], and [[Charles Stuart Bowyer]].
-The [[Hubble Space Telescope]] and [[Far Ultraviolet Spectroscopic Explorer|FUSE]] have been the major [[space telescope]]s to view the near and far UV [[Electromagnetic spectrum|spectrum]] of the sky, though other UV instruments have flown on [[sounding rockets]] and the [[Space Shuttle]].
+[[File:PIA20061 - Andromeda in High-Energy X-rays, Figure 1.jpg|thumb|center|500px|[[Andromeda Galaxy]] - in [[X-Ray astronomy|high-energy X-ray]] and ultraviolet light (released 5 January 2016).]]
+==Ultraviolet space telescopes==
-===UV Space Telescopes===
+[[File:M101 UIT.gif|thumb|Astro 2 UIT captures [[Pinwheel Galaxy|M101]] with ultraviolet shown in purple]]
-*[[Orbiting Astronomical Observatory]]
+*{{flagicon|United States}} - [[Far Ultraviolet Camera/Spectrograph]] on [[Apollo 16]] (April 1972)
-*[[International Ultraviolet Explorer]]
+*{{flagicon|United States}} + [[ESRO]] - [[TD-1A]] (135-286&nbsp;nm; 1972–1974)
-*[[Astron (spacecraft)|Astron-1]]
+*{{flagicon|United States}} - [[Orbiting Astronomical Observatory]] (#2:1968-73. #3:1972-1981)
-*[[Hubble Space Telescope]]
+*{{flagicon|Soviet Union}} - [[Orion 1 and Orion 2 Space Observatories]] (#1: 200-380&nbsp;nm, 1971; #2: 200-300&nbsp;nm, 1973)
-*[[Far Ultraviolet Spectroscopic Explorer|FUSE]]
+*{{flagicon|United States}} + {{flagicon|Netherlands}} - [[Astronomical Netherlands Satellite]] (150-330&nbsp;nm, 1974–1976)
-*[[GALEX]]
+*{{flagicon|United States}} + {{flagicon|European Union}} - [[International Ultraviolet Explorer]] (115-320&nbsp;nm, 1978–1996)
-*[[Swift Gamma-Ray Burst Mission]]
+*{{flagicon|Soviet Union}} - [[Astron (spacecraft)|Astron-1]] (150-350&nbsp;nm, 1983–1989)
-*[[Extreme ultraviolet Imaging Telescope]]
+*{{flagicon|Soviet Union}} - Glazar 1 and 2 on [[Mir]] (in [[Kvant-1]], 1987–2001)
+*{{flagicon|United States}} - [[FAUST (telescope)|FAUST]] (140-180 nm, in ATLAS-1 [[Spacelab]] aboard [[STS-45]] mission, March 1992)<ref>{{cite journal |author=Lampton, M., Sasseen, T. P., Wu, X., & Bowyer, S.|date=1993 |title=A study of the impact of the space shuttle environment on faint far-UV geophysical and astronomical phenomena |url= |journal=Geophysical Research Letters |volume= 20|issue=6 |pages=539–542|bibcode=1993GeoRL..20..539L |doi= 10.1029/93GL00093}}</ref>
+*{{flagicon|United States}} - [[Extreme Ultraviolet Explorer|EUVE]] (7-76&nbsp;nm, 1992–2001)
+*{{flagicon|United States}} - [[Far Ultraviolet Spectroscopic Explorer|FUSE]] (90.5-119.5&nbsp;nm, 1999–2007)
+*{{flagicon|United States}} + {{flagicon|European Union}} - [[Extreme ultraviolet Imaging Telescope]] (on [[Solar and Heliospheric Observatory|SOHO]] imaging Sun at 17.1, 19.5, 28.4, and 30.4&nbsp;nm)
+*{{flagicon|United States}} + {{flagicon|European Union}} - [[Hubble Space Telescope]] (various 115-800&nbsp;nm,1990-1997-) ([[Space Telescope Imaging Spectrograph|STIS]] 115–1030&nbsp;nm, 1997–) ([[Wide Field Camera 3|WFC3]] 200-1700&nbsp;nm, 2009–)
+*{{flagicon|United States}} - [[Swift Gamma-Ray Burst Mission]] (170–650&nbsp;nm, 2004- )
+*{{flagicon|United States}} - [[Hopkins Ultraviolet Telescope]] (flew in 1990 and 1995)
+*{{flagicon|Germany}} - [[ROSAT]] XUV<ref>[http://iraf.noao.edu/iraf/ftp/iraf/conf/web/adass_proc/adass_95/staubertr/staubertr.html R. Staubert, H. Brunner,1 H.-C. Kreysing - The German ROSAT XUV Data Center and a ROSAT XUV Pointed Phase Source Catalogue (1996)]</ref> (17-210eV) (30-6&nbsp;nm, 1990–1999)
+*{{flagicon|United States}} - [[Far Ultraviolet Spectroscopic Explorer]] (90.5-119.5 nm, 1999–2007)
+*{{flagicon|United States}} - [[GALEX|Galaxy Evolution Explorer]] (135–280&nbsp;nm, 2003–2012)
+*{{flagicon|Japan}} - [[Hisaki (satellite)|Hisaki]]  (130-530&nbsp;nm, 2013 - 2023)
+*{{flagicon|China}} - [[Chang'e 3#Lunar-based ultraviolet telescope (LUT)|Lunar-based ultraviolet telescope (LUT)]]  (on [[Chang'e 3]] lunar lander, 245-340 &nbsp;nm, 2013 -)
+*{{flagicon|India}} - [[Astrosat]]  (130-530&nbsp;nm, 2015 -)
+*{{flagicon|United States}} - [[Colorado Ultraviolet Transit Experiment]] - (255-330 nm spectrograph, 2021- )
+*{{flagicon|European Union}} - [[PROBA-3]] (CUTE) - (530-588 nm coronagraph, 2024- )
+*{{flagicon|Germany}} - Public Telescope (PST)<ref>[http://www.spektrum.de/news/ein-privates-weltraumteleskope-fuer-amateure-und-profis/1352064 Ein privates Weltraumteleskope für Amateure und Profis] Spektrum DE. June 2015</ref> (100-180&nbsp;nm, Proposed 2015, EU funded study )
+*{{flagicon|United States}} - Viewpoint-1 SpaceFab.US (200-950&nbsp;nm, Launch planned 2022)<ref>{{Cite web|url=http://www.spacefab.us/space-telescopes.html|title = Space Telescopes}}</ref>
+See also [[List of space telescopes#Ultraviolet|List of ultraviolet space telescopes]]
-[[Category:Astronomical imaging]]
-[[Category:Observational astronomy]]
+==Ultraviolet instruments on planetary spacecraft==
-[[de:Ultraviolettastronomie]]
+*{{flagicon|United States}} - UVIS (''[[Cassini–Huygens|Cassini]]'') - 1997 (at Saturn from 2004 to 2017)
-[[es:Astronomía ultravioleta]]
+*{{flagicon|United States}} - MASCS (''[[MESSENGER]]'') - 2004 (at Mercury from 2011 to 2015)
-[[ja:紫外線天文学]]
+*{{flagicon|United States}} - Alice (''[[New Horizons]]'') - 2006 (Pluto flyby in 2015)
-[[sk:Ultrafialová astronómia]]
+*{{flagicon|United States}} - [[UVS (Juno)|UVS (''Juno'')]] - 2011 (at Jupiter since 2016)
-[[fi:Ultraviolettitähtitiede]]
+*{{flagicon|United States}} - IUVS ([[MAVEN]]) - 2013 (at Mars since 2014)
+==See also==
+*{{annotated link|Markarian galaxies}}
+*{{annotated link|Pea galaxy}}
+{{Clear}}
+==References==
+{{Reflist|refs=
+<ref name=Reimers1984>{{cite journal
+| title=Discovery of a white dwarf companion of the "hybrid" K giant HD 81817
+| last=Reimers | first=D.
+| journal=Astronomy and Astrophysics
+| volume=136 | pages=L5–L6 | date=July 1984
+| bibcode=1984A&A...136L...5R }}</ref>
+<ref name=Ortiz2016>{{cite journal
+| title=Ultraviolet emission from main-sequence companions of AGB stars
+| last1=Ortiz | first1=Roberto | last2=Guerrero | first2=Martín A.
+| journal=Monthly Notices of the Royal Astronomical Society
+| volume=461 | issue=3 | pages=3036–3046 | date=September 2016
+| arxiv=1606.09086 | bibcode=2016MNRAS.461.3036O
+| doi=10.1093/mnras/stw1547 | doi-access=free }}</ref>
+}}
+==External links==
+*{{Commonscatinline|Ultraviolet astronomy}}
+{{Astronomy navbox|state=uncollapsed}}
+{{Authority control}}
+[[Category:Ultraviolet astronomy| ]]
+[[Category:Astronomical imaging]]
+[[Category:Astronomical sub-disciplines]]
+[[Category:Ultraviolet radiation|Astronomy]]