Across
- 4. the transfer of energy through matter or space
- 6. consists of a mass of gas held together by gravity
- 8. bands of dust that appear dark against bright stars
- 14. consists of electric and magnetic waves that travel through the speed of light
- 17. all space and the matter space contains
- 18. rotational center of a huge galaxy
- 19. states that the universe began as a small point
- 20. information obtained from experiments
- 21. waves with very high energy and no mass
- 22. the change in wavelength
Down
- 1. waves that are very high energy
- 2. representation of an object
- 3. how fast light travels
- 5. the distance between corresponding points
- 7. large cloud of gas and dust in interstellar space
- 9. visible light spectrum, the colors we see
- 10. waves with long wave lengths and low frequencies
- 11. a large grouping of stars in space
- 12. a plot surface of the color of stars v.s their brightness
- 13. a unite of length equal to the distance that light travels through space
- 15. instrument that collects light and radiation
- 16. beginning point at which something begins