Unit three science vocabulary space

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