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- [[Category:Astronomical]]3 members (2 subcategories, 0 files) - 19:43, 30 August 2015
- [[Category:Astronomical concept]][[Category:Observing Concepts]]151 B (21 words) - 20:57, 9 February 2009
- ...hout any real order. To distinguish the Messier number from other numbered astronomical objects, the letter "M" is usually placed in front of the object's number. [[Category:Astronomical concept]][[Category:Observing Concepts]]3 KB (452 words) - 05:01, 2 August 2015
- ... night sky visible from Ancient Greece. Ptolemy's constellations dominated astronomical thought for the next 1500 years. Even the Arabian astronomer Al-Sufi used P ...o fix the boundaries between constellations. To this end the International Astronomical Union (IAU) commissioned Eugene Delporte to create these boundaries. Delpor3 KB (430 words) - 04:05, 5 July 2010
- ...mmon usage both in and out of astronomy they can be inconvienent units for astronomical distances. To overcome this astronomers have come up with three other units ==Astronomical Unit==3 KB (491 words) - 21:08, 7 June 2011
- [[Category:Astronomical concept]]3 KB (463 words) - 22:47, 31 January 2016
- [[Category:Astronomical]]1 KB (214 words) - 20:57, 3 April 2016
- [[Category:Astronomical concept]]5 KB (789 words) - 02:26, 11 June 2009
- [[Category:Astronomical concept]]8 KB (1,212 words) - 12:35, 26 May 2015
- [[Category:Astronomical object]]225 B (40 words) - 18:46, 9 June 2010
- [[Category:Astronomical concept]]285 B (39 words) - 18:40, 9 June 2010
- [[Category:Astronomical concept]]420 B (60 words) - 13:18, 19 May 2022
- [[Category:Astronomical concept]]170 B (26 words) - 18:43, 9 June 2010
- [[Category:Astronomical concept]]320 B (43 words) - 18:40, 9 June 2010
- [[Category:Astronomical concept]]9 KB (1,536 words) - 20:35, 17 August 2010
- [[Category:Astronomical concept]]189 B (31 words) - 18:45, 9 June 2010
- [[Category:Astronomical concept]]157 B (28 words) - 18:44, 9 June 2010
- [[Category:Astronomical concept]]207 B (36 words) - 18:42, 9 June 2010
- ...eriod of the planet in years and a is the semi-major axis of the planet in astronomical units. Where a is the separation distance in astronomical units and p is their orbital period in years. This yields masses in solar m3 KB (614 words) - 14:33, 2 August 2015
- [[Category:Astronomical concept]]1 KB (170 words) - 14:32, 2 August 2015
