Across
- 3. energy resulting from charged particles
- 7. a supposition on limited evidence
- 8. large group of stars with gas
- 10. wave made up of photons
- 12. a wave that requires a medium
- 13. celestial object made of rack and ice with a tail
- 14. a study of celestial objects and space
- 15. furthest of the four gas giant planets
- 16. planet closest to the sun
Down
- 1. expert of physics
- 2. area around the sun
- 4. a wave that travels thru a vacuum
- 5. branch of science that studies matter and motion
- 6. undulating motion from one point
- 9. small rock orbiting the sun
- 11. type of wave that moves thru matter