space

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Across
  1. 5. 4 of these and they all have gassy surface
  2. 7. 4 of these and they all have rocky hard surface
  3. 8. there are millions of these in the sky all shapes and sizes
Down
  1. 1. we live on this and is a inner plane
  2. 2. a planet known as the red planet
  3. 3. has a tail and fly's in the sky.
  4. 4. there are 7 of these
  5. 6. is the closes planet to the sun