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