Across
- 2. Process where dense material sinks inward
- 3. Distance light travels in one year
- 4. Point directly overhead in the sky
- 6. Average Earth Sun distance used in the solar system
- 9. Process that builds planets from gas and dust
- 10. Another name for a moon
Down
- 1. Small early body that helps build planets
- 5. Zodiac based system not supported by science
- 7. Scientific study of objects in space
- 8. The Sun and everything orbiting it