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