'We see time appearing to flow five times slower.'
"If you were there, in this infant universe, one second would seem like one second – but from our position, more than 12 billion years into the future, that early time appears to drag."The light from 12 billion years ago — or only one billion or so years after the Big Bang — is only just reaching us. Over that unfathomably long journey, the universe has expanded greatly, meaning the wavelengths of light traveling along the way should appear to have significantly slowed down.
The constant and brief flashes of light from quasars make them useful for keeping the time from all those years ago, like the ticks of a clock. So, the astronomers watched for these 'ticks' in the green, red, and infrared light spectrums emanating from nearly 200 quasars over 20 years.
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