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Astronomers have watched the distant universe running in slow motion, marking the first time that the weird effect predicted by Einstein more than a century ago has been observed in the early cosmos.
The scientists found that events appeared to unfold five times slower when the universe was a mere 1bn years old, or about a tenth of its present age, because of the way the expansion of the universe stretches time.
According to Einstein’s theory of general relativity, astronomers should see ancient cosmic events happen more slowly than modern ones. The effect, known as time dilation, is driven by the expansion of the universe, as laid out in the German-born scientist’s fundamental exposition of gravity in 1915.
https://www.theguardian.com/science/2023/jul/03/astronomers-observe-time-dilation-in-early-universe
The scientists found that events appeared to unfold five times slower when the universe was a mere 1bn years old, or about a tenth of its present age, because of the way the expansion of the universe stretches time.
According to Einstein’s theory of general relativity, astronomers should see ancient cosmic events happen more slowly than modern ones. The effect, known as time dilation, is driven by the expansion of the universe, as laid out in the German-born scientist’s fundamental exposition of gravity in 1915.
https://www.theguardian.com/science/2023/jul/03/astronomers-observe-time-dilation-in-early-universe