Lesson 3&4

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Across
  1. 2. Distance that light travels in one year
  2. 6. Brightness seen from earth
  3. 8. star get lighter
  4. 9. A more accurate scale of the entire solar system
  5. 10. Group of single stars
Down
  1. 1. Blue and white core
  2. 3. Space and everything in it
  3. 4. brightness Brightness the star would have
  4. 5. Large cloud of gas and dust
  5. 7. First stage of a stars formation