keplers law rios

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Across
  1. 2. the oval-shaped path of a planet around the sun
  2. 7. the point around which two objects orbit each other
  3. 8. tides with the smallest difference between high and low
  4. 9. the theory that the solar system formed from a cloud of gas and dust.
Down
  1. 1. the rules that describe how planets move around the sun
  2. 2. a measure of how stretched out an orbit is
  3. 3. a group of planets that is made mostly by gas and has a large size.
  4. 4. a unit used to measure distances in the solar system
  5. 5. a word describing a place where life could exist
  6. 6. a planet made mostly of rocl or metal