UFOs...and Aliens too!!

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Across
  1. 1. Too hot to handle!
  2. 2. The Milky Way is one
  3. 6. Famous cartoon alien, or Martian
  4. 8. What a UFO travels through
  5. 9. A planet no more
  6. 11. Some say it's made of cheese
Down
  1. 1. Shine bright at night
  2. 3. Little green men
  3. 4. There are eight of them
  4. 5. The color of martians
  5. 7. First planet from the sun
  6. 10. Alien vehicle