Across
- 1. radiation from the big bang that was discovered by radio telescopes
- 5. in the centers of atoms, made of protons and neutrons
- 6. the theory that the universe originated from the:
- 8. tiny "objects" that make up everything
- 10. the building blocks of matter
- 11. second most abundant element
- 12. scale of the wavelengths of light
- 13. most abundant element in the universe
Down
- 2. visual effect that varies intensity by distance
- 3. a force than pulls matter together
- 4. everything
- 7. made of photons
- 9. a type of telescope that can observe radio wavelengths