Across
- 2. ___shaped-galaxy, very little gas
- 3. all space and matter
- 5. ___arms, stars spread out in a galaxy
- 6. the transfer of matter through space
- 8. our solar system
- 11. short electromagnetic waves
- 14. instrument that collects light and concentrates it
- 16. death of a large star
- 17. unit used to compare the size of stars
- 18. the change in wavelength
- 19. waves emitted by the nucleus of an atom
- 20. unit of length equal to how far light travels
Down
- 1. large cloud of gas in space
- 2. ___spectrum, a vast arrangement of waves
- 4. beginning point
- 5. how fast light travels
- 7. light can't escape
- 9. electromagnetic waves used in astronomy and medicine
- 10. theory of how the universe began
- 12. long electromagnetic waves
- 13. info obtained from scientific expirements
- 15. ___waves, provides us with light