Across
- 3. ball of glowing gas at a very high temp.
- 7. most widely accepted explanation of how the universe was formed
- 8. egg-shaped rotating galaxy
- 9. our galaxy
- 11. leftover material in the core after a supernova explosion
- 12. method of measurement for stars close to Earth
- 13. all of the star systems, galaxies, gas, and dust
- 14. group of stars
Down
- 1. method of measurement for stars that are relatively close to Earth
- 2. arms that spiral outward off of spiral galaxies
- 4. the study of the universe
- 5. stars orbiting each other
- 6. matter that we can't see but know exists
- 10. group of hundreds or thousands of stars
- 11. nuclei of two atoms combine to form new atoms