Across
- 2. Amount of space between 2 things
- 5. Collection of stars, dust,and clouds
- 8. Created the law of universal gravitation
- 9. Measure of gravity affecting an object
- 10. A force the pulls 2 objects together
- 11. Amount of matter
- 12. A path around a star, planet,or moon
Down
- 1. Mainly empty space
- 3. Celestial bodies that orbit a star
- 4. An oval shape that planets orbit
- 6. Big sphere of hot gas
- 7. Object's tendency to remain in the same motion