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