E-S-M System

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Across
  1. 2. the old theory of how our solar system was structured
  2. 5. an objects orbital motion around another object
  3. 7. how long it takes the earth to rotate on its axis
Down
  1. 1. word that means the sun is at the center of the solar system (opposite of 2 across)
  2. 3. an object spinning on its axis
  3. 4. the center of our solar system
  4. 6. approximately how long it takes the moon to orbit the earth
  5. 7. how long it takes the earth to orbit the sun
  6. 8. The imaginary line that planets rotate around