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For a long time, scientists believed they understood how fast the universe is growing — but the more they learn, those theories seem to be expanding as fast as the universe itself." measures the speed at which the universe is expanding. The only problem? Different instruments keep providing different values for it, giving rise to what's known as the "
It raises an interesting possibility: that, as Nobel Prize-winning physicist Adam Riess explains in a NASA blog, much of what we thought we knew about the universe may have been wrong. "We’ve now spanned the whole range of what Hubble observed, and we can rule out a measurement error as the cause of the Hubble tension with very high confidence," the Johns Hopkins physicist said.One possibility for the surprising reders could be stellar crowding, which occurs when space telescopes see more stars than they are able to handle, might affect expansion measurements as the light from them essentially warps their vision.
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