2023-07-13 03:38:22
A study of 190 quasars has made it possible to determine that the universe was five times slower than it is today. following the big bang which confirms that it seems to speed up as it expands, indicates a study published in Nature Astronomy.
Albert Einstein’s concept of time dilation
A team led by Geraint Lewis, from the Institute of Astronomy in Sydney (Australia), used these small celestial bodies with great luminosity as a temporal reference to appreciate the slowness of the universe in its beginnings, corroborating the concept of time dilation of the theory of relativity Albert Einstein.
This delay had already been verified previously, although less anciently, by observing supernovae (the result of the stellar explosion of one or more stars), whose brightness also travels through the universe.
The term quasar is the acronym for what is defined as a quasi-stellar radio source, which is formed when the black hole in the center of an early galaxy begins to “swallow” all the matter around it, generating very intense radiation.
Analysis of 190 quasars
Lewis worked with astrostatistician Brendon Brewer to examine 190 quasars observed over two decades, making it possible to standardize the “ticking” of each, revealing “the influence of the expansion of space,” the article explains.
“Looking back to a time when the universe was just over a billion years old, we see that time seems to flow five times slower,” Lewis says.
“If we were there, in that infant universe, a second would seem like a second, but from our position, more than 12 billion years in the future, that early time seems to be delayed,” he adds.
Einstein’s picture of an expanding universe
These results obtained thanks to these distant and therefore ancient bodies further confirm Einstein’s image of an expanding universe and for the first time identify time dilation at a very early time, the article says.
Furthermore, they show that “quasars can also be used as standard markers of time for the early universe,” along with other cosmological objects.
FEW (EFE, Nature Astronomy)
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