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Black holes keep 'burping up' stars they destroyed years earlier, and astronomers don't know why
(www.livescience.com)
this post was submitted on 27 Feb 2024
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https://www.reuters.com/technology/space/ferocious-black-holes-reveal-time-dilation-early-universe-2023-07-03/
Scientists have demonstrated "time dilation" in the early universe by studying quasars, supermassive black holes. Using 190 quasars as a cosmic clock, they observed time passing about a fifth as quickly as today, dating back 12.3 billion years. The study compared the brightness fluctuations of ancient quasars to those today, finding a fivefold slowdown.