Black Holes

3. stars of this size are too big to end as white dwarfs and too small to become black holes, spend their dying years as neutron stars
5. the distance the light travels in one year
7. The apparent change in position of an object when you look at it from different places.
9. a measure of how much light energy a star gives off
13. how large a star is
14. scientist who proposed the theory of the Big Bang
16. How hot a star burns
17. the end of life for a super massive star; super dense. Even absorbs light!
18. a system of many stars, gas, and dust, held together by gravity
19. the tiny star that remains after a supernova explosion

1. pretty much everything
2. the most massive and bright stars are these
4. the Doppler Effect as applied to light and stars
6. how bright a star seems from Earth
8. an increase in the frequency of sound, light, or other waves as the source and observer move toward or away from each other
10. breaks the light from an object into colors, used to tell the composition of stars and other heavenly objects
11. the idea that the Universe started as a super compressed dot that then exploded outwards and is still expanding
12. how bright a star would seem if it were our Sun
15. the compressed center of an old star after the outer layers blow away