The Solar system

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Across
  1. 1. Mars' larger moon
  2. 4. The hottest planet in the Solar System
  3. 10. The first planet to be found with a telescope
  4. 11. Planet that orbits the sun faster than any other planet
  5. 12. A planet without a true surface made up of hot dense fluids-water, methane and ammonia (two words)
  6. 13. A planet with 7 rings
Down
  1. 2. Spherical shell of space debris that surrounds the Solar System (two words)
  2. 3. The fourth planet from the Sun
  3. 5. Giant star at the centre of the Solar System
  4. 6. Only planet with liquid water on it's surface
  5. 7. Biggest planet in the Solar System
  6. 8. A planet made of helium/hydrogen without a solid surface (two words)
  7. 9. Windiest planet in the Solar System