Across
- 3. A star and everything that orbits around it
- 5. Explosion that can happen toward the end of a stars life
- 7. The _________ theory, that explains what is happening in the universe
- 9. Ball of rock metal and/or gas in orbit around a star
- 10. ___________ effect, why light appears redshifted
- 11. Element our sun is currently making
- 13. ___________ unit, 93 million miles
- 14. __________ sequence, the stage our sun is in
Down
- 1. That first step in a stars life cycle
- 2. A system of millions-billions of stars, gas and dust
- 4. The clumping together of stuff, how planets are formed
- 6. Number of planets in our solar system
- 8. Extremely dense, gravity so strong not even light can escape
- 12. Name of our galaxy