太空旅行如何加速衰老，以及它如何帮助我们在地球上延缓衰老

How ageing mimics the effects of space travel Life in space may feel distant, but studying astronauts could help us slow down ageing here on Earth, discovers Graham Lawton ONE of the most famous thought experiments in physics is the twin paradox, first proposed by Albert Einstein in his 1905 paper on special relativity and later expanded on by physicist Paul Langevin. An astronaut leaves Earth and spends a few months travelling through space at almost the speed of light. His twin brother stays on Earth. When the astronaut returns, he finds his brother has aged decades while he is still young. …