Celestia: Home
"Space is big. Really big. You won't believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it's a long way down the road to the pharmacy, but that's just peanuts to space."
Douglas Adams' description of space may be funny, but it's also very true.
Space is so big that you'd never think you could fit it in your computer, but that's just what Celestia does! It's free, downloadable planetarium software.
Celestia lets you travel throughout the solar system and more than 100,000 stars! You can even travel beyond the Milky Way through seamless 3D renderings.
Navigating this star map is easy. You can zoom in or out, or just click to go to another location. If hundreds of thousands of stars, galaxies, asteroids, moons, comets and spacecraft aren't enough, you can download dozens of add-ons with more objects.
System: Windows XP, Vista, 7, Mac OS X
FREE
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