Twin paradox
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In physics, the twin paradox is a thought experiment in special relativity involving twins, one of whom takes a space voyage at relativistic speeds and returns home to find that the twin who remained
During the ISS year-long mission, astronaut Scott Kelly (right) aged about 8.6 milliseconds less than his twin brother Mark (left), on Earth, due to relativistic effects.
Scott Kelly (astronaut)
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Scott Joseph Kelly is an American engineer, retired astronaut, and naval aviator. A veteran of four space flights, Kelly commanded the International Space Station on Expeditions 26, 45, and 46.
Twin paradox
…During the ISS year-long mission, astronaut Scott Kelly (right) aged about 8.6 milliseconds less than his twin brother Mark (left), on Earth, due to relativistic effects. In physics, the twin paradox is a…
Kelly at the Johnson Space Center in 2019
Kelly on STS-103 in a partial-pressure suit for reentry and landing (1999)
The crew of STS-118 (2007)