Inner planets

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Across
  1. 4. layers of gasses that keep in heat
  2. 6. has no atmosphere
  3. 7. repetitively moves around a planet
  4. 8. only planet to have any known life
  5. 10. separates inner and outer planets
Down
  1. 1. planets closer to the sun
  2. 2. like earth in some way
  3. 3. has a very thick atmosphere
  4. 5. biggest inner planet
  5. 9. a body that orbits a planet