Across
- 3. all space and matter space contains
- 7. distance between 2 corresponding points
- 8. between infrared and radio waves
- 9. _____ bang theory - a theory that says the universe began as a small point
- 11. lanes bands of dust that appear as dark ribbon
- 13. ____ spectrum- vast arrangement waves
- 17. ___ center- rotational center in the middle of the galxy
- 18. a mass of gas
- 19. Earth and planets revolve around this object
- 20. ____ rays waves that are very high
Down
- 1. _____ theories- unifying scientific explanations
- 2. large cloud of gas
- 4. ___ waves longer wavelengths than visible light
- 5. provide us with light
- 6. waves with long wavelengths
- 8. ____ -way galaxy - huge grouping of stars
- 10. the galaxy of a large star by explosion
- 12. instrument that collects light
- 14. transfer of energy, such as visible light
- 15. ____ -hole an object with more than four solar masses
- 16. beginning point which it derives
- 17. a large grouping of stars in space