Unit 3 Vocab.

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Across
  1. 2. The actual brightness of an object such as a star
  2. 5. a graph that shows teh relationships between star's surface temperature and absolute magnitude
  3. 7. Space and all matter and energy in it
  4. 9. All of the frequencies and wavelength of electromagnetic radiation
  5. 11. A collection of stars,dust,and gas bound together by gravity
  6. 12. A star that has collapsed under gravity to the point that the electrons and protons have smashed together to from neutrons
Down
  1. 1. A measure of how bright a star a star would be if it were seen from a standard distance
  2. 3. The brightness of a star seen from Earth
  3. 4. A small hot dim star that is left over center of an old sun like star
  4. 6. A gigantic explosion in which a massive star collapses and throws its outer layer into space
  5. 8. A large cloud of gas and dust in interstellar space
  6. 10. The distance of light travels in a year