Across
- 2. a gigantic explosion in which a massive star collapses and throws its outer layers into space
- 5. hertzsprung Russell diagram a graph that shows the relationship between a stars surface temperature and absolute magnitude
- 6. a collection of stars,dust,and gas bound together by gravity
- 7. space and all matter and energy in it
- 9. a measure of how bright a star would be if it were seen from a standard distance
- 10. a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
- 11. a small hot dim star that is left over center of an old sun like star
- 12. the actual britness of an object such as a star
Down
- 1. the brightness of a star as seen from earth
- 3. the distance that light travels in a year;about 9.46 trillion kilometere
- 4. all of the frequencies or wavelenghths of Electromagnetic radiation
- 8. a large cloud of gas and dust in intersteller space;a region where stars are birn