Jarvis' solar system crossword

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Across
  1. 2. a group of millions of billions of stars
  2. 3. a half of the earth of the equator
  3. 6. the galaxy where the solar system is located
  4. 7. the time for the earth to rotate once
  5. 9. A large natural object that orbits a planet
  6. 11. a large space rock that orbits the sun
  7. 12. a planet made mostly out of ice materials
Down
  1. 1. a force between any two objects that have mass
  2. 4. where one object blocks another object from view
  3. 5. the imaginary line between the north and south pole
  4. 8. A representation of an idea, object or system
  5. 10. The phase when the sunlit side of the Moon is facing away from Earth