NASA to study effects of long-term space travel using twins
DOI: 10.1063/PT.5.027853
The Telegraph : When Einstein presented his theory of special relativity, one Gedankenexperiment he used involved a pair of twins. He argued that the twin traveling at high speed through space would age more slowly than the twin on Earth would. Time dilation has already been demonstrated using atomic clocks, but NASA is going to turn the thought experiment into reality. Astronaut Scott Kelly will spend one year on the International Space Station while his twin brother, former astronaut Mark, stays on Earth. However, time dilation will not be the actual focus of the trip. Instead, 10 individual research projects will be studying the twins to see how the time in space affects a range of biological and physiological areas.
