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Astronomers have found huge planets orbiting very close to their parent stars. Could they have moons? Find out with the Extrasolar Planetary Satellite Integrator!

Saturn Ratings

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  • Saturday's
    Astro Fact:
    Did you know that Titan, the planet-sized moon of Saturn, has an environment in many ways similar to that of the early Earth? More...
    The Astronomy Workshop has averaged about 20,000 page views per year and has now outlived its counter!  

    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