Unit 3 Science Vocabulary Space!

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