3.3 billion newly discovered crescent moons in the galaxy light—Year Is one of the largest known structures in the universe and challenges some of the astronomers’ most basic assumptions about the universe.
A magnificent arrangement called the Giant Arc is made up of galaxies, clusters of galaxies, and lots of gas and dust. It is 9.2 billion light-years away and covers approximately one-fifteenth of the observable universe.
The discovery was “accidental,” Alexia Lopez, a PhD candidate for cosmology at the University of Central Lancashire (UCLan) in the United Kingdom, told Live Science.Lopez used about 120,000 lights to compose a map of objects in the night sky. quasar — A distant bright core of a supermassive galaxy Black Hole It consumes material and exhales energy.
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As this light passes through the substance between us and the quasar, it is absorbed by various factors, leaving a clear mark that can give important information to the researcher.In particular, Lopez used the remaining marks magnesium Determines the distance to intervening gases and dust, and the position of substances in the night sky.
Thus, quasars “act like spotlights in dark rooms, illuminating this intervening substance,” Lopez said.
The structure began to appear in the middle of the space map. “It was a hint of a big arc,” Lopez said. “I remember going to Roger [Clowes] “Oh, look at this,” he said. “
UCLan’s PhD adviser, Clowes, suggested further analysis to confirm that it was not a coincidence or a data trick. After performing two different statistical tests, the researchers determined that the probability that the giant arc was not genuine was less than 0.0003%. They presented their results at the 238th Virtual Conference of the American Astronomical Society on June 7.
But the discovery that would put its place on the list of the largest in the universe undermines basic expectations about the universe. Astronomers have long stuck to what is known as the cosmological principle. It states that on the largest scale, matter is almost evenly distributed throughout the universe.
Giant arc larger than other giant assemblies such as the Sloan Great Wall and Throwing Rate Wall Antarctic wall, Each is dwarfed by the features of the larger universe.
“Many large structures have been discovered over the years,” Crows told Live Science. “They are so big that you wonder if they are compatible with the cosmological principle.”
The fact that such giant entities are clustered in specific corners of the universe probably indicates that matter is not evenly distributed throughout the universe.
However, Lopez added that the current standard model of the universe is based on the cosmological principle. “If it turns out to be untrue, you may need to start looking at another set of theories and rules.”
Lopez doesn’t know what those theories would be, but he mentioned the idea of changing how gravity works on the largest scale.
Daniel Pomalade, a cosmographic scholar at the University of Paris Sacre in France, who co-discovered the Antarctic wall, agreed that the cosmological principle should determine the theoretical limits on the size of cosmic entities.
Some studies have suggested that the structure should reach a certain size and then be unable to grow, Pomarade told Live Science. “Instead, we continue to find these ever-increasing structures.”
But he is not ready to abandon the cosmological principle that has been used in cosmic models for about a century. “It would be very bold to say that it could be replaced by something else,” he said.
Originally published in Live Science.
There should be no 1.3 billion light-years of “giant arc” in the entire universe
Source link There should be no 1.3 billion light-years of “giant arc” in the entire universe