Across
- 3. all of the star systems, galaxies, dust
- 5. dense, light cannot escape
- 7. group of hundreds or thousands of stars
- 9. group of stars
- 11. two stars orbiting each other
- 12. biggest group of stars
Down
- 1. stars core changes to a white glowing sphere
- 2. explosion that occurs with a star's core
- 4. stars that are grouped closely together
- 6. a lot of stars held together by gravity
- 7. ball of glowing gas
- 8. study of the universe
- 10. our galaxy