Named the South Pole Wall, the cluster is 1.4 billion light-years in diameter and contains hundreds of thousands of galaxies
Astronomers have discovered on the South Pole of our planet a wall of galaxies with a diameter of 1.4 billion light years. Named “South Pole Wall”, it is the sixth largest cosmic structure of this type ever found.
It has always been there, but it has not been seen until now because large parts of it are half a billion light years behind the Milky Way, whose brightness impairs the observation of the region. That is why it became known as the “galactic obscuration zone”.
The discovery was made by a team led by Daniel Pomarede, cosmographer at Paris-Saclay University in France. In 2014 Pomarede and his team discovered the Lanaikea supercluster, an immense cluster of galaxies, of which Via Lctea is a part, which is 520 million light years wide and has a mass of 100 million billion sis.
To look through the veil of the Galactic Obscurity Zone, they analyzed the movement of galaxies in the region, measuring both the speed with which they move away from us and their relative movement to others.
With that, they managed to generate a three-dimensional map of space that shows a huge “bubble” more or less centralized in the southernmost part of the sky, containing hundreds of thousands of galaxies. The research results were published in the The Astrophysical Journal.
The wall may be even bigger: the team admits that it has not yet mapped its entire length, stating that “we will not know its total length, nor is it unusual, until we can map the universe on a significantly larger scale,” the authors said.
Source: Live Science
Astronomy Galxia Science & Space space exploration