The biggest thing in the universe is 10 billion light-years across.
. Astronomers once thought that these structures were the biggest things out there. In the 1980s, however, scientists realized that groups of galaxy clusters can also be connected by gravity, forming a supercluster, the largest class of objects in the universe.Right now, scientists' best candidate for the biggest supercluster known in the universe is the Hercules-Corona Borealis Great Wall, although astronomers have spent almost a decade debating the structure.
In 2013, a research team led by Istvan Horvath of the National University of Public Service in Hungary announced the Hercules-Corona Borealis Great Wall at theThe scientists had been studying brief cosmic phenomena known as gamma-ray bursts, which astronomers believe come from supernovas, or massive stars that explode at the end of their lifetimes.
"I would have thought this structure was too big to exist. Even as a coauthor, I still have my doubts," Jon Hakkila, an astronomy researcher at the College of Charleston in South Carolina, said in. But, he said, there was only a very small chance — far less than 1% — that the researchers saw a random number of gamma-rays in that location.
"Thus, we believe that the structure exists," he added."There are other structures that appear to violate universal homogeneity: the Sloan Great Wall and the Huge Large Quasar Group ... are two. Thus, there may very well be others, and some could indeed be bigger. Only time will tell."
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