Across
- 4. What orbits around the Earth?
- 6. When a star explodes
- 8. The planet we live on
- 9. A system of stars
Down
- 1. A vehicle for space travel
- 2. I'm at the center of our solar system
- 3. A cosmic ball of rock, dust and frozen gases
- 5. A force that causes two particles to pull together
- 7. A cloud of dust and gas in space