Astronomy Pictures
Wednesday, April 30, 2008, 1:35 pm •
Everyone should look at this collection of images from the Cassini mission to Saturn. That link will take you to the highlights, but elsewhere on the site you can see basically every picture taken from Cassini, as well as Voyager and Gallileo. Most of the good ones are available in very high resolution, and would look very nice printed out in a large format and hanging on your wall (I assume all the images are public domain -- the JPL pictures from Mars are).

My favorite is in Saturn's shadow (especially the 2nd one on that page). The amazing part about this image is that Earth is visible as a tiny dot through the rings. Some other nice ones are on the final frontier, the other side of Iapteus, ring world, odd world, classic appeal.
You can also get all the pictures from the Mars rover. Most of them are pretty stark Marsy landscapes, but some of the panoramas are pretty nice, like this one of Victoria crater.
Late addition: Finally, check out all the Hubble telescope images that are fit to print. They actually encourage you to print them out yourself.
The pictures are pretty amazing.