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#redirect [[Glossary of astronomy#galactocentric distance]] ...

* [[List of unsolved problems in astronomy|Unsolved problems in astronomy]] ...

...[[galaxy]] is emitted.<ref>{{cite web|title=Half-light Radius |url=http://astronomy.swin.edu.au/cms/astro/cosmos/h/Half-light+Radius |publisher=Swinburne Unive ...g/articles/aa/pdf/2002/08/aa1928.pdf | date = 15 February 2002 | journal = Astronomy & Astrophysics| volume = 383 | issue = 2 | pages = 384–389 |doi= 10.1051/00 ...

==Astronomy== ...//web.archive.org/web/20131202231237/http://members.ziggo.nl/jhm.vangastel/Astronomy/Formules.pdf |url-status=dead }}</ref> ...

...period of a billion years (especially in [[geology]], [[cosmology]] and [[astronomy]]), its more common usage is for any long, indefinite period. Aeon can als ==Astronomy and cosmology== ...

...[Ultraviolet photography]], a visual technology that has applications in [[astronomy]]]] ...

...ay_Burst.jpg|thumb|Illustration of a short gamma-ray burst, a [[transient (astronomy)|transient astronomical event]] caused by a collapsing star.<ref name="Nior *Various [[time-domain astronomy|transient astronomical events]], which present limited (and often unpredict ...

In astronomy and [[particle physics]], where the availability of particular kinds of tel ...

...t describes distances on a [[logarithmic scale]] based on the [[Magnitude (astronomy)|astronomical magnitude system]]. .....48..659A | doi=10.1016/j.newar.2004.03.001 | type=abstract | journal=New Astronomy Reviews | arxiv = astro-ph/0310673 }}</ref> the [[Andromeda Galaxy]]'s dist ...

...it may also involve filtering a faint signal from [[noise]], as in [[radio astronomy]], or reconstructing a hidden signal, as in [[steganography]]. ...

...rely on [[space infrastructure]]. Of the sciences, [[Outline of astronomy|astronomy]] and [[Outline of earth science|Earth science]] benefit from space technol ...8 |url-status=dead |df=mdy-all }}</ref> The probe passed the [[Heliopause (astronomy)|heliopause]] at 121 [[Astronomical unit|AU]] to enter [[Interstellar mediu ...

...tory]] on the Canary island of [[La Palma]].<ref name=wht/> [[First light (astronomy)|First light]] was on 6 July 2007.<ref name=firstlight /> Its name is a pla ...ral hydrogen at [[Hydrogen line|21 centimeters wavelength]] revolutionized astronomy in the second half of the 20th century, as a powerful tool to explore the s ...

In [[astronomy]], '''angular diameter distance''' is a distance defined in terms of an obj {{Portal|Astronomy|Physics}} ...

..., [[magnetic mirror]]s, [[biconic cusp]]s and [[polywell]]s. See [[Aurora (astronomy)|Aurora]] and [[Ring current]] ...

==Astronomy== ...

[[Category:Observational astronomy]] ...

...plied to the array of classical -ologies and -omies: anatomy, archaeology, astronomy, embryology, morphology, paleontology, taxonomy, botany, cartography, strat ...ude about descriptive science, and it is known that he was dismissive of [[astronomy]], which at the beginning of the 20th century was still gathering largely d ...

*Arthur Berry, ''A Short History of Astronomy'' (John Murray, 1898 – republished by Dover, 1961), 258–265. ...

...e [[Sun]] has an intrinsic luminosity of {{val|3.83|e=26|u=[[watt]]s}}. In astronomy, this amount is equal to one [[solar luminosity]], represented by the symbo ...}}</ref><ref>{{cite book |last1=Morison |first1=Ian |title=Introduction to Astronomy and Cosmology |date=2013 |publisher=Wiley |isbn=978-1-118-68152-7|url=https ...

...timetre per second (erg⋅cm⁻²⋅s⁻¹) is often used in [[astronomy]]. Irradiance is often called [[Intensity (physics)|intensity]], but this t In astronomy, stars are routinely treated as point sources even though they are much lar ...