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Across
  1. 1. A _____ planet is a small planet outside our solar system that also orbits around the sun
  2. 4. A space _____ is a thing that explores space, made by astronomers
  3. 7. A round object that revolved around the sun and is alone in its orbit
  4. 10. The gases around the earth
  5. 11. The ______ belt is the area outside our solar system with many small objects
  6. 12. This means to revolve around something
Down
  1. 2. A person who studies outer space
  2. 3. Is thing that astronomers use to see far in space
  3. 5. This is satellite that revolves around a planet
  4. 6. A large ball of burning gas
  5. 8. The imaginary line that a planet spins from
  6. 9. The _____ system is the planets that revolve around the sun