Crossplanets

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Across
  1. 1. Home to spooky and wacky aliens
  2. 4. Largest planet in the solar system
  3. 7. Farthest and the loneliest planet in the solar system
  4. 8. Second brightest object in the night sky
Down
  1. 2. Planet that loves to play with hula hoop (has rings around it)
  2. 3. Home for humans, of course
  3. 5. Non-existent, maybe
  4. 6. Fastest planet in the solar system