The Biggest Void In The Universe Is Not What We Think It Is.


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Called "Cold Spot", the region is exceptionally cold in background radiation that has spread throughout the Universe shortly after the Big Bang.

This radiation blanket is called the Cosmic Microwave Background (CMB), and while it is full of subtle temperature variations, the Cold Spot, however, remains a mystery to scientists who have not been able to explain why this location is consistently colder than its surroundings.

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The Cold Spot can be about 1.8 billion light-years away and it lacks 10,000 galaxies. This makes it the largest "void" in the universe, composed of about 20% less matter than the rest of the Universe, but according to a new study conducted by astronomers at the University of Durham in the UK, Cold Spot may not be just an emptiness.

Using the Anglo-Australian telescope, the team surveyed 7,000 galaxies, drawing light sources away from Earth as the Universe expands. And with this new set of data, they say there is no other void capable of explaining Cold Spot within standard cosmological theory.

Instead of a void devoid of galaxies, they suggest that the Cold Spot is made up of a group of small voids, which are surrounded by clusters of galaxies.

"Perhaps most exciting of all, this empty spot may have been caused by a collision between our Universe and another universe," explains astronomer Tom Shanks. In other words, we still do not know how Cold Spot got there for sure, but learning more about it could open new horizons within science.

Researchers acknowledge that there is no direct evidence in their results to support this idea, but that there is rather the possibility of being caused by another universe - in the multiverse. [ ScienceAlert ]

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