Across
- 4. how long stars live is based on their _______
- 6. what can stars steal from each other
- 8. what is the key component of stars
- 10. baby stars are called
- 12. color of the hottest star
- 14. what are galaxies made of?
- 16. color of the coldest star
- 17. what do we have in common with stars?
- 18. when large stars die, what do they do?
- 19. reaches Earth's surface
- 20. brightness of star
- 21. tool that compares star's temperature and magnitude
- 22. our galaxy
Down
- 1. system of two stars bound by gravity
- 2. shape of star
- 3. brightest star in galaxy
- 5. type of galaxy with arms
- 7. pulls gas and dust together
- 9. a supernova is another word for a star ________
- 11. stars are ________ km away from Earth
- 13. the brightness of a star as seem from Earth
- 15. massive stars collapsing creates a __________
- 19. burns up before reaching Earth