Cross word for science

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