Asteroids, Meteors, Comets and Moons

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Across
  1. 4. A piece of a meteor that lands on Earth.
  2. 6. This forms when a meteroid hits Earth's atmosphere.
  3. 7. Saturn's largest moon.
  4. 8. A frozen mass of different types of ice and dust orbiting the sun.
  5. 9. A dwarf planet that used to be considered a planet.
  6. 10. Bright lights of fast-moving light that form in the night sky.
Down
  1. 1. A rocky mass up to several hundred kilometers wide that revolves around the sun.
  2. 2. A large, round object that revolves around the sun but has not cleared the region around its orbit.
  3. 3. Gravity from here holds most asteroids in the area beyond Mars.
  4. 4. A natural object that orbits a body bigger than itself.
  5. 5. Astronomer that discovered Pluto.