The WorldWide Telescope (WWT) is a Web 2.0 visualization software environment that enables your computer to function as a virtual telescope, bringing together imagery from the best ground and space-based telescopes in the world for a seamless exploration of the universe. WorldWide Telescope is created with the Microsoft Visual Experience Engine ... More info »
Stellarium is planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.
Celestia is a free real-time 3D space simulation, allowing unrestricted access to hundreds of thousands of stars. 3rd-Party content is also available to expand the virtual universe.
WinStars uses the latest 3D technology to show the objects of our solar system in a realistic manner. Thus, it is possible to move from one planet to another, to follow a space probe on its long voyage or to observe a ce ...
Aciqra is an open source virtual planetarium and sky map program. It has the ability to track nearly 120,000 stars, the 8 planets, all 109 Messier object, the sun and the moon from any location on Earth to an accuracy of ...
We know an awful lot about software but not everything. We would be happy if you could tell us with a few words why is not an alternative to .