planets and moons

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Across
  1. 3. planet with a group of rings in the solar system?
  2. 5. satellite of the earth?
  3. 6. Telescope satellite of the earth?
  4. 7. red planet of the solar system?
Down
  1. 1. a planet with living organisms other than earth?
  2. 2. blue planet of the solar system?
  3. 4. the planet closest to the sun?