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  4. Our Solar System
  5. Solar System

  • Rare Earth

    Rare Earth

    The Planets

    The Planets

    Venus

    Venus

    What Are Asteroids?

    What Are Asteroids?

    An introduction to asteroids.

    The Birth of Our Solar System

    The Birth of Our Solar System

    What created our Solar System?

    What is an Orbit?

    What is an Orbit?

    All planets orbit the Sun, thanks to gravity.

  • How Did Saturn Get Its Rings?

    How Did Saturn Get Its Rings?

    The mystery that plagues the brightest brains in astrophysics.

    FactPack: Moons

    FactPack: Moons

    Find out about the moons of other planets.