week 3 vocab

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