Across
- 3. a celestial body of gas that shines
- 5. a change in sound and light
- 9. when the wavelengths are stretched
- 10. theory on how the universe began
- 12. when matter changes in a response to temperature changes
- 14. a system held together by gravity that contains planets and stars
- 15. when two atoms fuse together
Down
- 1. a celestial body that orbits around a star
- 2. a large star
- 4. when wavelengths are shorter
- 6. the name of a star after it explodes
- 7. a spectrum of electromagnetic radiation that shows bands from absorption
- 8. leftover radiation from the Big Bang Theory
- 11. the creation of the center of atoms that occurred after the Big Bang
- 13. a universal force