Across
- 4. millions of stars grouped together in space
- 6. amount of matter in an object
- 7. planet makes a complete spin on its axis
- 10. one object circles another in space
- 11. object that revolves around another object in space
- 12. used to compare the size of objects or distance between objects
Down
- 1. group of stars forming a fixed pattern in the sky
- 2. attraction of one object to another
- 3. objects made of ice, gases, and dust that orbit the sun
- 5. irregular pieces of rock moving through space
- 8. the path that a planet travels as it goes around the sun
- 9. push or pull