22.1 Early Astronomy

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Across
  1. 3. in this model, the sun, moon, and the known planets orbit Earth
  2. 4. motion The apparent westward drift in a planet
  3. 6. unit (AU) the average distance between Earth and the sun. (about 150 million Km)
Down
  1. 1. In this model, Earth and other planets orbit the sun
  2. 2. The science that studies the universe
  3. 5. an oval-shaped path