12 billion year old dark matter discovered for the first time: it could change the idea of ​​space

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    12 billion-year-old dark matter discovered for the first time: it could change our understanding of the cosmos

    Scientists have found dark matter in a cluster of galaxies that existed 1.8 billion years later years after the Big Bang.

    Japanese scientists in a new study have discovered the presence of mysterious dark matter, which is the dominant substance in the universe, further than ever before. Dark matter envelops a cluster of galaxies that already existed 12 billion years ago, that is, 1.8 billion years after the birth of the universe. Scientists have come to the conclusion that dark matter in the early Universe is not concentrated in dense patches in space, as modern cosmological models suggest. If this theory is confirmed, then this discovery could change the understanding of the evolution of galaxies. Scientists also believe that it is possible that the laws that govern the cosmos were very different 12 billion years ago, according to Space.

    Dark matter is very difficult to detect. It does not interact with matter and light, like ordinary matter. To “see” dark matter, astronomers must rely on its interaction with gravity.

    Gravitational lensing

    According to Einstein's theory of relativity, objects of enormous mass cause the curvature of space-time. Such objects can be huge galaxies or clusters of galaxies. These space objects can be used as a magnifying lens to observe light sources that are far behind them. This process is called gravitational lensing.

    To study the distribution of dark matter in a galaxy, astronomers can observe how light from a source behind a lens galaxy changes. The more dark matter a lens galaxy contains, the more it distorts light.

    12 billion year old dark matter detected for the first time: it could change the way we think about the cosmos

    But the earliest and therefore the most distant galaxies are very dim and it is becoming increasingly difficult for scientists to use gravitational lensing for them study. That is why, so far, scientists have observed the distribution of dark matter only in galaxies at a distance of 8-10 billion years.

    Relic radiation

    But in the new study, scientists used the oldest source of light in the universe – the CMB, left over from the Big Bang and still traveling through space. CMB radiation, like the light of very distant galaxies, is bent by lens galaxies.

    “We were able to look much further into the early history of the Universe to measure dark matter in galaxies that are 12 billion years old,” says Yuichi Harikane from the University of Tokyo, Japan.

    Scientists believe that 12 billion years ago, a cluster of galaxies, which was just beginning to form, was gravitationally bound to a much larger amount of dark matter. Japanese scientists suggest that in the early universe, dark matter did not create dense patches in space, as modern cosmological models predict.

    This could change our understanding of the cosmos

    “If our theory is correct, then it may be necessary to revise current theories about the nature of dark matter. This could change our entire understanding of the universe,” says Harikane.

    As Focus already wrote, the most sensitive dark matter detector in the world is ready to unravel one of the mysteries of the Universe. Scientists want to discover the hypothetical particle that makes up this mysterious substance, called dark matter.

    As for other discoveries from the field of astronomy, as Focus already wrote, scientists have found the heaviest neutron star in the Universe. It is the second fastest spinning neutron star in the Milky Way and is a cannibal pulsar. This star has almost completely absorbed the matter of its companion, which may soon disappear.

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