Across
- 3. Big gas spheres that produce heat and light.
- 5. Rocky spheres which move in the galaxy.
- 6. Dust and gas that will form stars.
- 8. Celestial bodies which orbit a planet.
- 9. Balls of dust and ice.
Down
- 1. An asteroid that has hit a planet.
- 2. Small planets.
- 4. Groups of nebulas and stars.
- 7. Gas or rock spheres which orbit stars.