inner planets

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Across
  1. 3. the envelope of gases surrounding a planet
  2. 5. goes around
  3. 9. mercury venus earth mars
  4. 10. home planet
Down
  1. 1. a celestial body moving in orbit around a star
  2. 2. earth like
  3. 4. the red planet
  4. 6. have different numbers of
  5. 7. very thin atmosphere
  6. 8. earths sister planet