An astronaut orbits earth in the space shuttle. In one complete orbit is the magnitude of the displacement the same as the distance traveled?

The displacement of the astronaut orbiting the Earth in a space shuttle will be zero.

Since,

Displacement is determined by initial position and the final position of an object.

The distance traveled by the astronaut is a circular pathway,

hence,

The displacement of the astronaut is equal to zero as he arrives at the exact same position from where he started his journey.