Unit 3 vocab

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