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Featured Tool:
Compress the 10 billion years history of the Universe into a year and find out when the interesting stuff happened with the Universe Timeline!

Saturn Ratings

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  • Saturday's
    Astro Fact:
    Did you know that the Earth's magnetic field reverses itself periodically, so compasses that point North today will one day point to the South? More...
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    Materials for Students and Instructors.

    Created by Dr. Douglas P. Hamilton and students at U. Maryland. We gratefully acknowledge support from NSF (1998-2003) and NASA (2003-2010). About Us