Planetary Transformation

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Across
  1. 1. founder of SpaceX
  2. 3. faction or fantasy
  3. 5. gases surrounding planets
  4. 8. bodies found in space
  5. 9. friend or foe?
  6. 11. O3
  7. 13. to take control of or settle
  8. 14. indicates we may not be alone in the cosmos
Down
  1. 1. the Red planet
  2. 2. occurring between planets
  3. 4. other body likely to be transformed
  4. 6. radio waves, infrared, X, and gamma rays
  5. 7. force causing bodies to fall towards center of earth
  6. 10. leader in space exploration
  7. 12. humans lose this density in space