Across
- 4. Our galaxy
- 5. Balls of ice and gas hurtling through space
- 7. Clouds of gas in space
- 8. Fiery balls of gas
- 10. A huge explosion that happens when a star dies
- 11. Groups of solar systems-sometimes in a spiral pattern
Down
- 1. A galaxy that we once thought was a nebula
- 2. The part of space we can't see
- 3. This sucks in anything-even light
- 6. A small sphere that has immense gravity
- 9. Huge rocks floating through space. We live on one!
- 12. Extraterrestrial beings