Across
- 1. hole densest object that light can't penetrate
- 6. sudden brightening of a star
- 11. pair of stars that orbit each other
- 13. developing star
- 14. 90% of stars the H-R diagram shows
- 15. a spinning neutron star
- 16. SUPER large stars
- 17. galaxies are retreating away from us
- 18. large groups of gas, dust, and stars
- 19. remains of low/medium mass stars
- 20. clusters groups a galaxies
Down
- 2. how bright a star actually is
- 3. very bright stars in the top right of H-R
- 4. theory of how the universe began
- 5. stars that get brighter and dimmer
- 7. end of a stars life that creates and explosion
- 8. relationship ofstars and temp
- 9. remnants of a supernova
- 10. magnitude stars brightness from Earth
- 12. used to designate a grouping of stars