Across
- 4. how bright something is
- 5. The place we live in
- 7. big cloud of gas in space
- 8. how fast light travels in a year
- 9. the center of our solar system
- 12. a lot of stars in one area
Down
- 1. something the moon goes through
- 2. a star that changes in brightness
- 3. a concentration of mass so dence nothing can leave it
- 6. the end of a stars life that's an explosion
- 10. a large black whole
- 11. small rock entering earths atmosphere