The Sky is the Limit

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Across
  1. 3. Every hero needs one
  2. 4. Funny book or strip
  3. 6. A sound that repeats itself
  4. 9. A question with a twist
  5. 10. Something you play, not hunt
  6. 13. Midnight craving
  7. 15. What planets love to do
  8. 16. A quick flash of light
Down
  1. 1. Picture made of many small pieces
  2. 2. Where bubbles like to hang out
  3. 5. Sometimes fluffy, sometimes stormy
  4. 7. Key piece of a mystery
  5. 8. Something up your sleeve
  6. 11. Not a human, not a plant
  7. 12. The punchline is coming
  8. 14. Opposite of stress