Astronomers discovered the”Antarctic Wall”, a huge structure that stretches for 1.4 billion light years
The spectacular three-dimensional map of the universe shows one of the largest cosmic structures ever discovered:a nearly incredible”wall”, this The wall spans 1.4 billion light-years and contains thousands of galaxies.
This cosmic structure called”The South Pole Wall” has been hidden in people’s sight until now. Because most of it lies 500 million light-years behind the bright Milky Way. The size of the Antarctic Wall is comparable to the sixth largest cosmic structure that has been discovered-The Sloan Great Wall. (One light year is about 6 trillion miles, or 9 trillion kilometers, so this”largest cosmic structure” is incredibly huge.)
Astronomers have long noticed that galaxies It is not scattered randomly throughout the universe, but gathered together in the so-called Cosmic Web. In this huge hydrogen chain, galaxies are like pearls on a necklace, surrounding a huge and empty space.
The cosmologist Daniel Pomared of Paris Saclay University in Paris, France explained that, drawing these galaxies The line belongs to the field of cosmic graphics, which is to draw a”cosmic map”.
Previous cosmological work has drawn the range map of other galaxy combinations, for example, the current largest structural record holder:The Hercules-Corona Borealis Great Wall, which The span of is 10 billion light years, which is equivalent to one tenth of the visible universe.
In 2014, Pomared and his colleagues announced the Rania Kea supercluster, which is a collection of galaxies where our Milky Way is located. The Rania Kea supercluster is 520 million light-years wide and has a mass of about 100 million suns.
On their new map, the research team used the newly created sky measurements to peek into an area called the Milky Way’s obscured area. This is an area south of the sky, and the bright light of the Milky Way blocks most of the things behind and around it.
In general, cosmologists usually use redshift to determine the distance to an object. Redshift refers to the speed at which objects recede from the earth due to the expansion of the universe, depending on their distance. The farther the object is from the earth, the faster it appears to leave the earth. This is the first observation made by astronomer Edwin Hubble in 1929 and has been valid since then.
But this time, Pomared and his colleagues used a slightly different technique to observe the special velocity of the galaxy. This measurement includes redshift, but also considers the movement of a galaxy around another galaxy under gravity.
The advantage of this method is that it can detect hidden quality. These hidden masses have a gravitational effect on the way the galaxy moves, so that dark matter can be found. This invisible matter does not emit light, but exerts gravitational pull on anything close enough. (Dark matter also constitutes most of the matter in the universe). By running algorithms to observe special movements in the Milky Way’s star catalog, the research team was able to map the three-dimensional distribution of matter in and around the Milky Way’s shadowed area.
Their new findings have been published in detail in recent days”Astrophysical Journal”.
The final map shows an incredible bubble of matter, which is more or less at the southernmost end of the sky, with a huge long wing extending northwards, with one side facing the whale constellation , The other side faces the Apus constellation.
In this regard, scientists tell us that understanding the appearance of the universe on such a large scale helps to confirm our current model of the universe. However, it is difficult to determine where these huge, interlaced structures start and end.
Even Pomared’s research team admits that they may not have drawn all of the huge Antarctic wall. Before drawing a larger map of the universe, they could not determine its full range, nor whether it was unusual.
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