Across
- 1. A small hot dim star that is leftover center of an old sun like star
- 4. A collection of stars,dust,and gas bound together by gravity
- 9. A star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
- 11. All of the frequencies or wavelengths of electromagnetic radiation
- 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 standerd distance
- 3. The brightness of a star as seen from Earth
- 5. The distance that light travels in a year;about 9.46 trillion kilometers
- 6. Hertzsprung-Russell diagram a graph that shows the relationship between a star's surface tempature and absolute magnitude
- 7. Space and all the matter and energy in it
- 8. The actual brightness of an object as a star
- 10. A large cloud of gas and dust ininterstellar space;a region where stars are born