Across
- 3. collection of stars
- 5. year the distance that light travels
- 6. diagram hertzsprung russell
- 8. magnitude a measure of how bright a star is
- 10. star a star that is left over
- 12. spectrum all of the frequency
Down
- 1. a gigantic explosion
- 2. all space
- 4. magnitude the brightness
- 7. the sctual brightness
- 9. dwarf a small hot dim star
- 11. cloud of gas