Across
- 4. turns into a sun
- 6. a ball of rock and ice that orbits the sun
- 8. a large round, rocky body that orbits the sun
- 10. a person who explores space
Down
- 1. a group of stars forming a shape or figure
- 2. a burning ball of gas
- 3. a large body that orbits a planet
- 5. full of galaxies, planets, and stars
- 7. when a star explodes
- 9. the only planet known to man that contains life