Across
- 2. has a nucleus of bright stars and two or more arms.
- 4. fastest speed
- 7. a collection of stars,gases,dust and planets.
- 8. shift in light tward the red
- 10. existing matter+space considered as a whole
- 12. curved mirrors that reflect light and form an image
Down
- 1. has many different shapes and are smaller than most galxies.
- 3. our galaxy
- 5. theroy that the universe exanded from a hot dense.
- 6. a device that measures the spectrum of light.
- 9. when planets and moons revolve around a star.
- 11. telescope that uses a glass lens to collect light