4.5 early ideas in astronomy

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Across
  1. 3. two points inside an ellipse
  2. 4. a symmetrical shaped oval
  3. 5. smaller bodies that orbit the planets are known as
  4. 6. a german astronomer
  5. 7. the force of attraction that exists between two objects
Down
  1. 1. one greek astronomer
  2. 2. the large bodies that orbit the sun are known as