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Space
Space
Science
Keith Cooper

Time appeared to move 5 times more slowly in 1st billion years after Big Bang, quasar 'clocks' reveal

Geraint Lewis Albert Einstein Quasar Pan Earth
a bright orange star blasts out two jets from its poles

Time has been observed passing more slowly in quasars in the early universe.

The observed time dilation comes as a consequence of Albert Einstein's theory of general relativity combined with the expansion of space. "At its heart, this is another 'Einstein is right again' story," Geraint Lewis, a cosmologist at the University of Sydney, told Space.com.

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