Across
- 3. the explosion of a star
- 6. increase in wavelength causing a shift toward the red end of the electromagnetic spectrum
- 7. consists of stars, gas, and dust held together by gravity
- 8. the theory explaining the origin of the universe
Down
- 1. consists of space,time,matter and energy
- 2. it contains our solar system
- 4. a celestial body moving in an elliptical orbit around a star
- 5. the study of the cosmos/the entire universe