A Java applet that shows an interactive 3D representation of the planets and satellites of the solar system.

[freeware - Win 98/ME/2000/XP] Three-dimensional models of the Milky Way neighborhood.

A free 3D space simulator that lets you travel through the solar system and beyond to over 100,000 stars. [Windows, Mac; Open source]

[Freeware - Win3.x/95] A three-dimensional aid to viewing some of the nearer stars of our galaxy, navigating the distances between them, and accessing basic stellar information.

A freeware program that lets you navigate through the solar system neighbourhood at different times in past or future, and to see the sky in a stereographic projection.

Accurate wireframe simulator for the Voyager and Giotto space missions, with animation capability. Developed at JPL for science/navigation, and filmed by the BBC/NOVA. Conveniently runs from any Windows/DOS. Freeware.

[freeware - Windows] Models the interaction between bodies in space according to Newtonian physics.

[freeware - Win 9x/NT/2k/XP] Simulates orbits of planets and other celestial bodies.

[Win 9x/Me/NT/2000 shareware] Mixes sky simulator and astronomical encyclopedia with speaking guide. Simulates most aspects of the space-watching experience. Other free astronomy software included.

[commercial - Windows] Hands-on presentations and simulations about being an astronaut and commanding the space shuttle.

[open source - Win95/98/NT/2000 or Unix/Linux & OpenGL] Newest NASA data creates a fast 3D display of our home solar system, 25000 stars, galaxy, planets, moons, asteroids and even controllable spacecraft.

[shareware - Win95/98/NT] Offers realistic views of entire sky with interactive and three-dimensional view modes.

[commercial, demo available - Win95/98/NT] A solar system simulator and planetarium, with planetary encyclopaedia.

[online Java applet] This 3-d solar system applet can be rotated and zoomed with the mouse. Below it are links to other online gravity simulators and resources for building solar system simulations.

Space simulators reviews and tutorials to program a 3d engine for a space sim.

SpaceWander's award-winning multimedia tour of the Universe features real space pictures from NASA

[commercial - Win95/98/NT, Macintosh] A planetarium and solar-system simulator; lets you view the universe from anywhere in our planetary neighbourhood in the past, present, and future.

[shareware - Win 98/ME/2K/XP] A 3D software planetarium. Photo realistic real-time 3D renderings of 2 million stars, galaxies, nebulae, and the Milky Way. Includes several educative tutorials.

[freeware - DOS] Interactive 3D virtual reality Solar System which allows users to "fly" to and around nearby stars in the Milky Way Galaxy.

[open source - Unix] Displays results to the screen or can be used as a screen saver. Includes a college level introductory text on the n-body problem.