Across
- 1. measure of how bright a star would be
- 4. large cloud of gas and dust in interstellar space
- 8. distance that light travels in a year
- 10. brightness of star seen from earth
- 11. space and all the matter and energy in it
- 12. gigantic explosion
Down
- 2. actual brightness of an object
- 3. all of frequencies of electromagnetic radiation
- 5. graph that shows relationship between stars surface temperature and absolute magnitude
- 6. small hot dim star
- 7. collection of stars, dust, and gas bound together by gravity
- 9. star that has collapsed under gravity