Unit 3 vocab

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