Look Up in the Sky

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Across
  1. 2. Wind-borne toy
  2. 4. Big or Little constellation
  3. 5. Aurora borealis; Northern _______
  4. 6. Earth orbiter
  5. 10. Showery day arch
  6. 12. Dark spot in space (2 words)
  7. 13. Goodyear floater
  8. 17. Ringed planet
  9. 19. Aries or Orion
  10. 20. Nocturnal mammal
  11. 21. Aircraft that hovers
  12. 22. Puffy sky sight
Down
  1. 1. Sirius, for one
  2. 3. Natural electric discharge
  3. 7. Halley's _______
  4. 8. The Red Planet
  5. 9. Sunset location
  6. 10. NASA projectile
  7. 11. Venus or Earth
  8. 14. Jet
  9. 15. Rocky space object
  10. 16. The Milky Way is one
  11. 17. Earth warmer
  12. 18. It's a _____, it's a plane, it's Superman