Space.com provides some of the best information on the Web about the universe. You can see the latest space news. You can even monitor space missions. The site has a "SpaceViews" section offering up pictures and videos for you to see what's out there.
The Chandra X-Ray Observatory from Harvard University continuously takes pictures of space phenomenon thousands of light years away. You can view all those pictures on the site.
Game to teach science: Named after the Greek lunar goddess, Selene challenges players to learn the major geologic processes scientists believe formed the modern Moon. Players create their own moon and then pepper it with impact craters and flood it with lava.