Earth and Space - Vocabulary check

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Across
  1. 4. A model of the Solar system with the Earth at the centre.
  2. 7. A synonym for orbit.
  3. 9. To spin.
  4. 10. A measurement used to determine the size of a round object.
  5. 11. To be lit up.
Down
  1. 1. A model of the Solar System with the sun in the centre.
  2. 2. To grow.
  3. 3. The name given to each half of the Earth. The Southern one is below the equator and the Northern one is above.
  4. 5. Round.
  5. 6. To travel in a curved path around an object.
  6. 8. To decrease in size.