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