I have a passing interest in astronomy, in my usual passive know-things-but-don’t-do-much-about-them way. I’ve been editing the entries on constellations on Wikipedia, during which time I’ve learned some truly cool trivia:
If we lived on a planet orbiting Alpha Centauri, most of the constellations would be the same, but Earth’s sun would be in the constellation Cassiopeia.
Alpha Centauri’s proper motion will make it and Beta Centauri into a brilliant double star four thousand years hence.
Beta Comae Berenices is approximately the same magnitude as our sun; its faintness gives an impression of how our sun would appear at only 27 lightyears away.
Barnard’s Star is in Ophiuchus; Wolf 359 is in Leo.
Wooooooooooooooowwwwwww. Anyone else care to contribute?