The Solar System

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Across
  1. 3. This body orbits around the Earth but it does not rotate
  2. 4. This is the imaginary line that runs and south that the Earth rotates on
  3. 6. These planets have a solid surface made of rock
  4. 12. 2/3 of this planet's surface is covered with water
  5. 13. This planet is sometimes called the topsy-turvy planet because it spins on its side
  6. 14. The biggest planet in the Solar System
  7. 15. These bodies are sometimes called shooting stars when they enter the Earth's atmosphere
  8. 17. small, frozen mass of dust and gas revolving around the sun
  9. 18. This planet has a very thin atmosphere which makes it very, very cold
Down
  1. 1. Large, round bodies in outer space that revolve around a star
  2. 2. These planets have no hard surface
  3. 5. This is the smallest planet in our Solar System
  4. 7. The sun and all of the objects that orbit around the sun
  5. 8. Chunks of rock and metal in orbit around the sun
  6. 9. This is the last of the gas planets and the furthest planet from the sun
  7. 10. This planet has the most rings
  8. 11. This planet has toxic carbon dioxide in it's atmosphere which makes it impossible for humans to survive in
  9. 16. This is how long it takes the Earth to revolve around the Sun