Blast off!

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Across
  1. 2. An unknown creature from space
  2. 3. In Zero _______, you can float around
  3. 6. There are many phases of this, including Full, New and Waning Crescent
  4. 7. #3 wears this to breathe or walk on the moon
  5. 9. You can use this to see stars and planets up close!
Down
  1. 1. The Earth (and everything else in our solar system) orbit around it
  2. 2. Someone who goes to outer space
  3. 4. We see tons and tons of these on clear nights, and they can form constellations
  4. 5. Blast off! when this takes off
  5. 8. Unidentified Flying Object, also known as a ________