It's not
a resource per se, but I probably should have mentioned the
Astronomy Picture of the Day, run by
NASA, which features a different space related picture every day. As you can see, some of these are amazing works of art in their own right, but with the accompanying blurb you can also learn some science while you're at it. The official site doesn't have an RSS feed unfortunately, but
Jef Poskanzer has put together
an unofficial feed which you can use to get your daily helping easily.
