Solar system

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Across
  1. 4. Reddish in colour, nicknamed the 'red planet'
  2. 6. Not a planet or comet, but small rocky object
  3. 8. A 4.5 billion dwarf star, containing hydrogen and helium
  4. 10. Takes 27 days to orbit, made mostly of rock, with craters
  5. 11. Small solid chunks of debris
Down
  1. 1. 71% of the Earth's surface is covered by this
  2. 2. The outer layer of the Earth
  3. 3. Earth's inside, made mainly of Iron
  4. 5. Mostly made of gas, has rings and approximately 9 times wider than Earth
  5. 7. A place launched in 1988
  6. 9. Made of frozen water, begins to release gas when close to the sun