Across
- 2. the biggest planet
- 4. planet we live on
- 5. a force that moves an object away
- 7. a force that brings an object closer
- 9. some light can go through this material
- 12. force that pulls objects to the ground
- 14. cover protects the astronaut's head
- 15. gives off heat and light
Down
- 1. no light can go through this material
- 3. all light can go through this material
- 6. made of billions of stars, gas, and dust
- 8. made of rock and soil
- 10. air we breathe
- 11. object that attract metal
- 13. protects the astronauts' eyes when it's too bright