The stars look the same from night to night. Nebulae and galaxies are dully immutable, maintaining the same overall appearance for thousands or millions of years. Indeed, only the sun, moon and planets - together with the occasional comet, asteroid or meteor - seem dynamic.
About This Quote
About Seth Shostak
Seth Shostak was a contemporary American astronomer and author. Seth Shostak is an American astronomer and author, and is currently the senior astronomer for the SETI Institute. Read more on Wikipedia →