Talk:Apsis

From Simple English Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Merging discussion[change source]

The Aphelion and Perihelion are just "apoapsis" and "periapsis" of the Sun. Similarly, the "apoapsis" and "periapsis" of Earth are called "apogee" and "perigee". So, the two seperate articles are pointless.

–Yours sincerely, Soumyabrata 15:28, 13 July 2019 (UTC)[reply]

Absolutely agreed. --MiXT4PE (talk) 14:10, 30 December 2019 (UTC)[reply]

Well, if the sites are cross-referenced and linked, I see no reason to change. In fact, the perihelion entry could be made more detailed. Strictly speaking it's the barycentre (of the Earth and the Moon) that is at perihelion, so the centre of the Earth isn't always closest to the sun at perihelion, it might be closer on other days close by (unless it's a full moon). And because of apsidal precession - the Earth rotating on its axis - and taking into account precession of the Earth's axis the direction of perihelion will change, so that in around 6,000 years perihelion will occur in mid-March rather than in January.— Preceding unsigned comment added by 86.149.186.13 (talkcontribs) 00:12, 12 March 2021 (UTC)[reply]