Across
- 4. Collection of planets and stars all orbiting around a larger star
- 5. Comes from dead stars
- 9. Wavelength measurement key
- 10. The oldest form of radiation in our universe
Down
- 1. Constantly expanding container of everything
- 2. The beginning of our universe
- 3. The first recognized atom
- 6. The force that holds everything together
- 7. Made up of Neutrons Protons and Electrons
- 8. The smallest of subatomic particles