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Twice as fast or half as far?

My friend races between 2 markers in space in his spaceship close to the speed of light. Through my binoculars from Earth I measure his time as 1 hour. My friend on his spaceship measures the time he takes as being 30 minutes, slower because time for him relative to me slows down. So, if he takes half the time to travel the same distance then surely he must be either be travelling twice as fast or the distance between the 2 buoys for him is compressed and is half as long.
Michael Luper from East Sussex (Age: 55+)

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