Space Stuff :)

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Across
  1. 5. second space shuttle to explode
  2. 6. nasa moon orbiter
  3. 7. moon program
  4. 8. modern reusable rocket
Down
  1. 1. space station orbiting earth
  2. 2. modern spaceflight company
  3. 3. reusable rocket of the 80's
  4. 4. first space shuttle to explode