Across
- 3. where most stars are found on H-R diagram
- 9. change in frequency when source/observer is moving
- 10. small hot dim star, leftover center of an old sunlike star
- 12. object so massive that light can't even escape its gravity
- 13. (magnitude) brightness of a star 32.6 LY from earth
- 15. body composed of gas that emits light
- 17. very large and bright star has a hot core, used up most of its hydrogen
- 18. star that suddenly becomes brighter
- 19. apparent shift in position of object when viewed from different locations
Down
- 1. cloud of dust & gas, where stars are born.
- 2. study of evolution of universe
- 4. group of stars organized into a recognizable pattern
- 5. star that collapsed under gravity, forms neutrons.
- 6. (magnitude) brightness of a star as seen from earth
- 7. very luminous object that produces energy at a high rate
- 8. distance light travels in a year
- 11. rapidly spinning neutron star emits radio & optical energy
- 14. theory that supports the formation of the universe
- 16. collection of stars, dust, a& gas bound by gravity