Across
- 2. has multiple galaxies
- 5. dying star
- 6. bound system of stars
- 10. How bright something is
- 11. late stage in its life as big as it will get
- 12. A diagram that classifies star
Down
- 1. a dead star
- 3. classifies stars
- 4. fusing hydrogen and helium in its core
- 7. star that have expanded greatly in size
- 8. galaxy that includes our system
- 9. a cloud of gas and dust in space