Talk:perigee

RFV
Rfv-sense. Per, is this used in reference to any body other than the earth? - -sche (discuss) 22:03, 15 April 2012 (UTC)
 * It is. It would be easy to cite, but I don't have time now. Anyway, please see this edifying bgc search for more. --Μετάknowledgediscuss/deeds 22:56, 15 April 2012 (UTC)
 * I'm not so sure. As Smurrayinchester commented about, those books seem to be proceeding from or discussing geocentric physics, and seem to be using the term in reference to orbits around the earth. I'll have to put on my physics hat and take a close look at them... - -sche (discuss) 02:25, 16 April 2012 (UTC)
 * Hmmm, I hadn't thought of that. I've never seriously studied astronomy, so I'll leave it to Smurray, who seems to know what (s)he's talking about. --Μετάknowledgediscuss/deeds 03:45, 16 April 2012 (UTC)
 * "perigee of the sun" is not likely to get many useful results - the sun doesn't really orbit anything other than the centre of the galaxy, and we don't know enough about its orbit to say what its apsides are. Anything that comes up for that search must therefore be talking about geocentric physics (and therefore talking about the sun orbiting the Earth). I tried searches of "perigee of X" for various moons of the solar system - Io, Titan, Ganymede, Phobos, Charon - none of which found anything. Nor was there anything at all for Uranus, Neptune or Pluto (all of which were discovered after we realised planets orbit the sun). As far as I can tell, there is no credible use of apogee or perigee for orbits around anything other than the Earth (regardless of whether those orbits are real or just illusory) Smurrayinchester (talk) 22:32, 16 April 2012 (UTC)


 * Cited, but also rewritten. Please take a look. (Incidentally, these cites also verify the challenged sense of .) —Ruakh TALK 14:22, 17 April 2012 (UTC)
 * Thank you, Ruakh! - -sche (discuss) 21:02, 17 April 2012 (UTC)
 * Aha, that all looks fine. Good finds! Smurrayinchester (talk) 21:46, 17 April 2012 (UTC)