Across
- 2. star made of fire that other planets rotate around
- 5. "red planet"
- 8. scientist who thought about why objects fall
- 10. how much matter the object is made of
- 12. spins clockwise
- 14. measure of gravitational pull on an object
- 16. closest to the sun
- 17. "sideways planet"
Down
- 1. biggest planet in our solar system
- 3. orbits around earth
- 4. dwarf planet
- 5. galaxy our universe is in
- 6. what all the planets are in
- 7. pulls everything together
- 9. planet that supplies life for all humans
- 11. luminous point in the sky
- 13. only planet with a ring
- 15. balance of the stars