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Astronomers Have Discovered A Giant Wall Of The South Pole In The Sky

Astronomers Have Discovered A Giant Wall Of The South Pole In The Sky

Astronomers have discovered a giant thread-like structure called the South pole Wall behind the Laniakei supercluster, according to an article in the Astrophysical Journal. It is comparable in size to the great Sloane wall, the third — largest complex of super-clusters of galaxies known in the Universe today.

Over the past 40 years, it has become known that galaxies in the Universe do not exist independently, but are United in larger structures. So, the milky way, along with the Andromeda galaxy, the Triangle galaxy, and their satellites are part of a Local group, and that, in turn, in the Virgo supercluster, which is attracted to a gravitational anomaly in the center of Laniakea called the Great attractor. And the Great attractor itself is attracted by The much more massive Shapley supercluster, to which our galaxy is heading at a speed of 660 kilometers per second (for more information about structures in the Universe, see the material "Oh, the great repeller!").

Now astronomer Daniel Pomarède from the University of Paris-Saclay has reported the discovery of another large structure, the galactic thread of the South pole Wall. Its densest part lies in the direction of the South pole of the Earth — in honor of which it was named. The structure from which light is coming to us 500 million years ago is located just behind the Laniakei supercluster and occupies about 200 degrees of an arc on the Ecliptic-more than a semicircle-extending far into the Northern sky.

The Northern part of the Wall of the South pole bends and approaches the milky way at a distance of about 300 million light-years. At the same time, the authors are not sure that they saw the structure completely since they were able to detect it only by the gravitational influence that it had on the speed of movement of galaxies studied by astronomers. Direct observations of the object are difficult: it is located in a region of the sky that has not been fully explored by instruments since it is partially hidden by the arms of our own galaxy.

A couple of years ago, astronomers discovered another giant structure — the Saraswati galaxy supercluster, which extends for 200 megaparsecs. Since the object was formed in a young Universe, scientists hope to use it to study the role of dark energy in the evolution of superclusters.