Lesson 3 vocab

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Across
  1. 3. Missing matter
  2. 5. Old science
  3. 6. The color of a star appears bluer
  4. 7. A theory on how the world began
Down
  1. 1. Reletively small, round objects in space
  2. 2. the science with which you are most familiar
  3. 4. The color shift toward the red end of the color spectrum