One of my favorite sites (I waver between having it and ObWi as my startup page) is NASA's Astronomy Picture of the Day. It occurred to me that I haven't mentioned it, which seems like a strange omission. So here are two pictures:
The different colors are differences in the composition of the relevant bit of moon -- according to the site, blue means titanium-rich, for instance.
This next one is "Kepler's Supernova Remnant in X-Rays":
If I didn't have a job, I could look at the archives of this site for weeks on end. So I thought I'd share.
What's up with you?