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4K Earth
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0:11
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Cosmorae
He spent 803 days in orbit….
Cosmonaut Sergei Krikalev spent 803 days aboard space stations in low Earth orbit. Because of time dilation caused by his high orbital velocity, he aged slightly slower than people on Earth. The difference is tiny — about 0.02 seconds — but measurable, demonstrating the real-world effects of Einstein’s theory of relativity. In other words ...
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