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