WorldWide Telescope is a free visualization software that allows you to use your computer as a virtual telescope. The WorldWide Telescope brings imagery from ground-based and space-based telescopes, to your computer.
WWT blends terabytes of images, information, and stories from multiple sources into a rich media experience delivered over the Internet. For example, you can join Harvard astronomer Alyssa Goodman on a journey that shows how dust in the Milky Way Galaxy condenses into stars and planets. Or you can accompany University of Chicago cosmologist Mike Gladders two billion years into the past to view a gravitational lens bending the light from galaxies – a phenomenon that allows you to see billions more years into cosmic history.
WorldWide Telescope provided by Microsoft, is available as a both web based client, as well as downloadable Windows based client. The Microsoft research team has dedicated WorldWide Telescope to the memory of Jim Gray and thus released it as a free resource, for all.