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Could the Space Shuttle pass through the Van Allen Belt safely?
Yes, and it has. Astronauts are limited in their time in space for their whole life so they are not exposed to too much radiation. However, the International Space Station and the Space Shuttle, along with the Saturn V on the way to the moon, passed through Van Allen Belt, and have done so safely. They are usually put on a path to pass through the thinnest parts, and at the fastest possible speed.