Earth in Space and Time Review!

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Across
  1. 2. All planets rotate on an _____
  2. 7. The third planet away from the Sun
  3. 8. In the middle of the inner and outer planets
  4. 9. One complete trip around the Sun
  5. 10. The composition of the outer planets
Down
  1. 1. 24 hours on Earth
  2. 3. The sixth planet away from the Sun
  3. 4. Forms when a comet's gasses melt as it gets closer to the Sun
  4. 5. Our home galaxy
  5. 6. Moons orbit ______