Geo Player Mars Demo Download Description: The Geo Player Mars program allows you to explore the Red Planet in 3D from outer space to rocks on the Martian surface or fly through valleys and over craters on desktop PCs and laptop computers.

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The list includes about 1000 programs and it is updated and periodically completed.

All the Download are free, but the free being doesn't guarantee some right on the ownership 3D Solar System Download Description: A rolling 3D solar system with all the planets and some big moons orbit.

Astro Fly Download Description: The main purpose is to present the three-dimensional models of our neighborhood in our own Milky Way Galaxy on a personal computer.

All travel in Celestia is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across.

Copernic Download Description: A real-time simulator of the Solar System and its surroundings written under the Open GL environment using C/C++.

It offers the posibility to view satellites, planets, asteroids, comets, centaurs, transneptunian objects, 400 stars, most of the nebulas and clusters around our Sun on a 7000 l.y range.It also displays all the Messier objects, 750 transneptunians, 10 000 asteroids, 300 comets, 100 centaurs.The 3D models are based on the remarkable Hipparcos and Tycho Catalogues.Celestia Download Description: Celestia is a free real-time space simulation that lets you experience our universe in three dimensions.Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth.You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy.