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Explore the universe for free

Explore the universe for free
photo courtesy of shutterstock

"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 chemist, but that's just peanuts to space."

That's Douglas Adams' description of the heavens from "The Hitchhiker's Guide to the Galaxy," and it's accurate. In fact, space is so big that you'd never believe it could fit inside your computer! But somehow an entire galaxy fits in this simple, downloadable software.

Celestia lets you travel to more than 100,000 stars with the click of your mouse! It would take trillions of dollars and billions of years to do it in person, but this program lets you explore in seconds for free.

Next page: Explore space on your computer
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