Space Discovery

12345678
Across
  1. 2. ___ was established in 1958.
  2. 4. The moon's sky is black because it doesn't have an ____.
  3. 5. Who discovered Jupiter's moons?
  4. 6. What scientific instrument did Galileo observe Jupiter's moons.
  5. 8. Neil Armstrong and ___ Aldrin were the first people to walk on the moon.
Down
  1. 1. Philosophers used to believe that heavenly bodies revolved around the ___.
  2. 3. 11 What space mission took the first people to land on the moon?
  3. 5. You weigh less on the moon because it has less ___.
  4. 7. Because there are no air molecules to carry ___ waves, __ cannot be heard on the moon.