Space Crossword

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Across
  1. 2. / masses in orbit around another mass
  2. 3. / the way something moves around something else
  3. 5. / oval shaped
  4. 9. / path an object takes around another object
  5. 10. / force of attraction between masses
Down
  1. 1. / one comlete orbit around the Sun
  2. 4. / every four years
  3. 6. / caused by the tilt of the Earth's axis
  4. 7. / a ball of ice, rock and gases
  5. 8. / the line between the North and South Pole