Across
- 3. a small hot and dim star that is the left over of an old star
- 6. all of the frequencies or wavelengths of electromagnetic radiation
- 7. the brightness measured from a star if seen from a standard distance
- 9. a region where stars are born
- 10. the actual brightness of something
- 12. the distance that light travels in a year.
Down
- 1. a gigantic explosion when a certain type of star does when it dies
- 2. a graph that shows the relation between a star's surface temp and absolute magnitude
- 4. the brightness of a star as seen from earth
- 5. space and all the matter and energy in it
- 8. a star that has collapsed under gravity to the point the electrons and protons have smashed toghether and became neurons
- 11. a collection of stars, dust, and, gas bound together by gravity