Outer space

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Across
  1. 1. planet closest to the sun
  2. 4. planet that is now a dwarf planet
  3. 7. what the Earth does around the sun
  4. 11. the opposite of light
  5. 12. planet with rings
Down
  1. 2. the opposite of hot
  2. 3. what the Earth does on its axis
  3. 5. sphere in the night sky lit by the sun
  4. 6. rock flying through space
  5. 7. vehicle in which to travel to outer space
  6. 8. where we live
  7. 9. what the sun is
  8. 10. person who explores outer space