Space

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