StarStrider software 3D planetarium -- [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 many educative tutorials. Visit

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

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

3D Solar System Simulator -- A Java applet that shows an interactive 3D representation of the planets & satellites of the solar system. Visit

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

Liftoff Space Simulator -- [commercial - Windows] Hands-on presentations & simulations about being an astronaut & commanding the space shuttle. Visit

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

Space simulator & 3d engine tutorials -- Space simulators reviews & tutorials to program a 3d engine for a space sim. Visit

OpenUniverse -- [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 & even controllable spacecraft. Visit

Copernic space simulator -- 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. Visit

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

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

Solar System Applet -- [online Java applet] This 3-d solar system applet can be rotated & zoomed with the mouse. Below it are links to other on line gravity simulators & resources for building solar system simulations. Visit

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

SpaceWander Virtual Space Trip! -- SpaceWander's award-winning multimedia tour of the Universe features real space pictures from NASA Visit

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