Across
- 2. electromagnetic waves with very high energy
- 4. change in wavelength that allows us to determine if an object is moving
- 5. electromagnetic waves that are very high energy
- 7. electromagnetic waves with longer wavelengths
- 9. provide us with visible light
- 10. radio waves with long wavelengths
- 11. ___shaped galaxy,a galaxy with a bulge
- 12. unifying scientific explanations
- 15. the distance between two corresponding points
- 21. rational center of a huge galaxy
- 22. large cloud of gas and dust
Down
- 1. areas of stars that spread from the center
- 3. the death of a large star by explosion
- 6. used in astronomy as a standard unit
- 8. a galaxy with a bright center
- 13. beginning point
- 14. collects light for better observation
- 16. the transfer of energy through matter
- 17. an object with more than four masses
- 18. a representation of an object
- 19. how fast light travels
- 20. all space and the matter space contains