planets and moons

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