Across
- 2. a giant ball of hot gas that gives off light
- 3. the force that keeps planets in orbit
- 4. the red planet
- 6. massive system of stars planets and dust
- 7. the first human to walk on the moon
- 9. vehicle used to explore space
- 10. the galaxy that contains earth
Down
- 1. a group of stars forming something
- 5. rocky objects found in space
- 8. cloud of gas and cosmic dust