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