Unit 3 science vocab space

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