Unit 3 vocabulary

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