Search results

The '''Metonic cycle''' is a period of about 19 years used in [[astronomy]] and [[calendar]] studies. In particular, it is often used in the structur ...h would last a total of <math>19\times12=228</math> lunar months. But from astronomy we know that 19 solar years are the same length as <math>235</math> lunar m ...

..., and planets.<ref>Aaboe, Asger. 2001 ''Episodes from the early history of Astronomy''. New York: Springer-Verlag, p 17–19.</ref> ...he Sun, and centres on the [[Center of mass#Barycenter in astrophysics and astronomy|barycenter]] of the solar system. This is very close to the centre of the S ...

[[Category:Astronomy]] ...

...ref name=wc>Sander A; Hamann W.R. & Todt H. 2012. The galactic WC stars. ''Astronomy & Astrophysics'' '''540''': A144. [http://www.aanda.org/index.php?option=co ...ut of 3.846×10²⁶ W. This number is the basic [[metric]] used in astronomy: it is known as 1 solar luminosity, the symbol for which is <math>L_\odot</ ...

...age=EarthPieSlice.png|caption=Cross section of Earth's Interior|standard=[[astronomy]], [[geophysics]]|quantity=[[distance]]|symbol='''''R''_🜨'''|symb "Earth radius" is sometimes used as a [[unit of measurement]] in [[astronomy]] and [[geophysics]]. The [[International Astronomical Union]] recommends ...

...astronomy-and-astrophysics_1983-07_124_2/page/54 | date = 1983 | journal = Astronomy & Astrophysics | volume = 124 | page = 54 | bibcode=1983A&A...124...50C}}</ ...al lunar ephemeris adequate for historical times | date = 1988 | journal = Astronomy & Astrophysics | volume = 190 | page = 351 | bibcode=1988A&A...190..342C}}< ...

* Graham, James R., "''Astronomy 202: Astrophysical Gas Dynamics''". Astronomy Department, UC, Berkeley. ...

[[Category:Astronomy]] ...

...lt|language=en-US}}</ref> is a unit of angle used in [[mathematics]] and [[astronomy]]. An arcsecond is 1/60th of an [[arcminute]] (minute of arc),<ref name=":0 ...

...and the object is no longer visible.<ref>Chaisson, Eric, and S. McMillan. Astronomy Today. San Francisco, CA: Pearson / Addison Wesley, 2008. Print.</ref> It i ...

[[Category:Astronomy]] ...

...developed from a need to compute angles and distances in fields such as [[astronomy]], [[mapmaking]], [[surveying]], and artillery range finding.<ref name=":0" ...hich deals with [[spherical geometry]]. This is used for calculations in [[astronomy]], [[geodesy]] and [[navigation]]. ...

....edu/astr161/lect/history/newtongrav.html|access-date=2009-01-24|publisher=Astronomy 161|language=en}}</ref><ref>{{cite book|page=[https://archive.org/details/q ...

...f Gl 581 |title=The HARPS search for southern extra-solar planets |journal=Astronomy and Astrophysics Letters |year=2005 |volume=443 |pages=L15–L18 |bibcode=200 ...planet system |url=http://obswww.unige.ch/~udry/udry_preprint.pdf |journal=Astronomy and Astrophysics Letters |volume=469 |issue=3 |pages=L43–L47 |doi=10.1051/0 ...

...ecause no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can In astronomy, the brightness of an object is given in terms of its [[absolute magnitude] ...

|field = [[Physics]]<br />[[Astronomy]] ...

[[Category:Astronomy]] ...

...rning. Most of his work was about [[number theory]], [[statistics]], and [[astronomy]]. ...

...a&id=3658| access-date=2006-08-10 | title=A Flare for Barnard's Star| work=Astronomy Magazine }}</ref> Barnard's Star has the [[variable star]] designation V250 ...A&A...379..634G | title=Stellar encounters with the solar system | journal=Astronomy & Astrophysics | volume=379 | page=642 | year=2001 | issue=2 | doi=10.1051/ ...

...which may happen at the same time as the end of the inflationary [[Epoch (astronomy)|epoch]]. For technical purposes, ideas such as the average temperature of ...