Across
- 2. matter we know existence but we can't see
- 7. big glowing ball of gas
- 9. this is so dense that light cannot escape it
- 12. a group of stars grouped closely together
- 14. the remains of a star after a supernova explosion
- 15. a galaxy appearing as a rotating disk of dusk and clouds
- 16. a galxay that only contains a few millions stars
Down
- 1. a violent explosion when a star's core succumbs to gravity
- 3. group of stars
- 4. method of measuring stars from different points our the earth
- 5. group of solar systems, stars, planets, galaxies
- 6. nuclei of two atoms combine to form a new atom
- 8. hypothetical energy, said to take up 71% of our universe
- 10. the study of the universe
- 11. our galaxy
- 13. biggest group of stars; may included hundreds of millions