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