Unit Three Vocab

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