Across
- 2. a small hot dim star
- 4. brightness of a star from standard distance
- 7. star that has collapsed under gravity
- 8. graph that shows rel. of stars temp. and ab. magnitude
- 9. all matter and energy in space
- 11. distance light travels in a year
- 12. collection of stars dust and gas
Down
- 1. actual brightness of an object
- 3. big explosion of massive star
- 5. all frequencies and wavelenghts of elec. rad.
- 6. brightness of a star as seen from earth
- 10. a large cloud of gas in interstellar space