Across
- 1. mass comparing the size of star to the sun
- 3. bang theory theory that says the universe began as a small point
- 4. way huge grouping of stars
- 5. arms areas of stars that spread
- 7. all space
- 8. cloud of gas
- 10. a group of stars
- 11. electromagnetic waves that are between radio waves
- 16. waves provide us with visible light
- 17. of light 300,000km/sec
- 18. electromagnetic waves that are very high energy
Down
- 2. beginning point at which something begins
- 3. hole more than four solar masses squeezed into a ball
- 5. shaped galaxy galaxy with a bulge in the center
- 6. instrument that collects light
- 9. transfer of energy through matter
- 12. distance between any two corresponding points
- 13. death of a large star by explosion
- 14. shift change wavelength
- 15. year a unit of length equal to the distance that light travels
- 19. planets revolve around this