Users interested in Galaxy 3d live wallpapers for windows 7 generally download:
Galaxy 3D Space Tour Screensaver takes you on a trip around the Milky Way.
You will be able to see literally thousands and thousands of stars and many other stellar objects.
You will watch the movement of Nebulas, clusters of stars, spiral nebulas and many more.
Celestia is a really nice tool that lets you explore the Universe as it provides real-time 3D visualization of space. Celestia is impressively comprehensive as it is based on the Hipparcos Catalogue (the result of the European Space Agency's "astrometric" mission from November 1989 to March 1993) and therefore contains more than 100,000 stars.
