Wikipedia:Reference desk/Archives/Science/2021 March 24

= March 24 =

If universe is vast, then how they keep track of stars or exoplanets?
If universe is vast, then how they keep track of stars or exoplanets? Rizosome (talk) 04:26, 24 March 2021 (UTC)
 * The Sun is a star. It is not hard to keep track of the Sun. --Lambiam 07:56, 24 March 2021 (UTC)
 * Almost all exoplanets orbit their star (there's a few rogue planets which aren't bound to a star). Stars don't move very quickly across the sky (see proper motion), so basically they are where they were last seen. LongHairedFop (talk) 08:21, 24 March 2021 (UTC)
 * Please see Celestial coordinate system.--Shantavira|feed me 08:58, 24 March 2021 (UTC)


 * You would be well-advised to take a course in elementary astronomy. ←Baseball Bugs What's up, Doc? carrots→ 10:29, 24 March 2021 (UTC)


 * Read Exoplanetology (and the nav boxes at the bottom) and Star catalogue for info on records of large numbers of objects held here on Earth by humans. Graeme Bartlett (talk) 12:31, 24 March 2021 (UTC)


 * It is much harder to keep track of the NEOs. --Lambiam 21:19, 24 March 2021 (UTC)