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