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