Stars

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Across
  1. 6. One of the primary tools used by scientists to collect data on the stars.
  2. 7. The brightness of as star as seen from Earth. Known as apparent ___________.
  3. 9. Planet's are different from stars as they do not perform nuclear fusion and do not produce their own _________.
  4. 10. A device that breaks light into colors and produces an image of the resulting spectrum.
Down
  1. 1. One if the two main "ingredients" of stars.
  2. 2. The brightness of a star from a standard distance from Earth.
  3. 3. The size and the _______________ of the star determine its brightness.
  4. 4. One of the two things needed to figure out a stars absolute brightness: the stars ___________brightness, and distance from Earth.
  5. 5. The number of stars in our galaxy.
  6. 8. The chemical process that all stars undergo.