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How does Earth's tilt affect the amount of sunlight that your hometown gets? Mess with Earth's Seasons to find out!



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  • Monday's
    Astro Fact:
    Did you know that the deep interior of Jupiter is made of an exotic substance called liquid metallic hydrogen? 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