Across
- 2. stars,dust,and gas
- 5. Hertzsprung-Russell diagram a graph that shows the relationship between a star's surface temperature and absolute magnitude
- 7. gigantic explosion in which a massive star collapses and throws his outer layers into space
- 10. small hot dim star that is the left over center of an old sun like star
- 11. Star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
- 12. all the frequencies or wavelengths of electromagnetic radiation
Down
- 1. large cloud of gas in interstellar space
- 3. brightness of a star as seen from earth
- 4. all matter and energy
- 6. actual brightness of an object such as a star
- 8. distance that light travels in a year
- 9. Measure of how bright a star would be if it were scene from a standard distance