Across
- 3. The movement of a planet around a star.
- 4. We live on it.
- 7. They study stars.
- 9. An extremely large group of planets and stars.
- 10. A strange thing that is flying in the sky.
Down
- 1. You can see it at night.
- 2. This is the mixture of gases around a planet.
- 5. This allows you to see stars closer.
- 6. This is the force that makes something fall.
- 8. You can see them at night.