Across
- 5. considered by most to be the start of the universe
- 6. A phenomenon that mainly occurs because the universe is constantly expanding
- 7. A type of radiation that is essentially heat
- 8. Number of EM Radiation categories
- 9. Atmospheric ______: Aids in the search for other planets
Down
- 1. The king of optical astronomy
- 2. the largest wavelength on the EM Spectrum
- 3. One of NASA's greatest concerns on the Artemis II mission since the Sun was a the height of its 11-year cycle
- 4. our eyes work in this wavelength