In The Planetarium

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Across
  1. 3. You use this to fly to the moon.
  2. 6. He or she flies in a rocket.
  3. 7. This is something which you use to look at the night sky.
Down
  1. 1. The night sky is full of these.
  2. 2. Saturn is one of these.
  3. 4. This has got a tail and it flies through the sky.
  4. 5. The planet Earth has one of these.