Across
- 2. The scientifical study of space.
- 4. Left over energy from the beginning of the universe.
- 5. Used to study light.
- 8. electrons, protons, and neutrons that formed the universe.
- 10. The visible spectrum is that portion of the electromagnetic spectrum that's visible to the human eye.
Down
- 1. An instrument that separates and measures the light waves of light.
- 3. The light of something when moving toward or away from you.
- 6. A theory that the universe started growing and forming.
- 7. a series of planets that have a gravitational pull.
- 9. all matter and space that exists.