Space Travel

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Across
  1. 2. The world's first artificial satelite
  2. 3. Minimum speed for a rocket to escape from the orbit
  3. 5. It is used for launching spacecraft into space
  4. 7. Used to slow down a spacecraft
  5. 8. What inspired the space race
Down
  1. 1. Travel through outer space
  2. 4. First man in space
  3. 6. Navigation system that tells you your exact location anywhere on Earth