Across
- 2. fall: falling without anything
- 6. gravity: you are weightless
- 7. nova:a ball of light that is a exploding of a big star
- 8. laws:how the plants move
- 10. comet:fast objects to train astronauts
- 11. effect: use energy from gravitation fields to slingshot an object
- 12. hole:nothing can escape not even light
- 15. of space all of everything
- 16. of the earth
- 17. what the planets do to the sun
- 19. energy:energy that is stored
- 20. how much you weigh
- 21. the dark part of the moon
Down
- 1. law of universal gravitation:all objects pull on each other
- 3. motion:an object that falls side ways
- 4. object in space that studies the earth and space
- 5. planets attraction because of their masses
- 9. it rotates around the sun
- 13. of rocks that fall to the earth sometimes
- 14. energy: energy that is in motion
- 18. a rock that orbits the sun
- 20. dwarf: a small star with lots of density
- 21. how much is in an object