Across
- 4. All space and matter.
- 5. Waves with low frequencies.
- 9. Smaller version of the real thing.
- 11. Galaxy we are in.
- 14. Large ball of gas in space.
- 15. Colors we see
- 16. Star the earth orbits around.
Down
- 1. Most dangerous wavelength.
- 2. Change in wavelength.
- 3. Explosive death of a star.
- 6. Distance between two points on a wave.
- 7. Waves with a longer length than light.
- 8. Object in space with immense gravity.
- 9. How fast light travels.
- 10. Transfer of energy.
- 12. A large group of stars.
- 13. Wavelength most commonly used in hospitals.