Copied from Apod

apod, the Astronomical Picture of the Day, often has absolutely stunning images. Today it's an animated gif of the moon over a month (or rather a lunation, a lunar cycle). I've put it in cuts, since it's 400+K, but it's well worth looking at even if you have a slow connection.

( Lunar cycle )

http://www.livejournal.com/users/apod/187632.html for the full story on this.