Across
- 3. an objects that enters Earth's atmosphere
- 7. a artificial satellite used as a long-term base
- 9. relating to land
- 10. an engine that provides thrust without air intake
- 12. a path around a point in space
- 13. what outer planets are made of
- 14. to spin on an axis
- 15. the air around a planet
- 18. made of ice,dust,and rock
Down
- 1. a unmanned spacecraft for exploring the solar system
- 2. a device or vehicle of travle outside Earth's atmosphere
- 4. the four largest moons of Jupiter
- 5. rocks that revolve the Sun
- 6. The National Aeronautics and Space Administration
- 7. a spacecraft for transporting people and cargo
- 8. what separates the inner and outer planets
- 11. the movement of following a orbit
- 13. a force that causes things with mass to attract to another
- 16. what Mars and Jupiter are
- 17. a vehicle used for exploring an extraterrestrial body