Scientists have long been puzzled by a strange gap in the structure of the GD-1 star stream, which is located on the outskirts of the Milky Way.. The stars in this stream orbit the center of our galaxy through the halo of the Milky Way. Scientists believe that the cause of the gap is the presence of a subhalo of self-interacting dark matter within a large halo of dark matter that surrounds our galaxy. Thus, the results indicate that the model of the evolution of the Universe may not be entirely correct.. The study was published in Astrophysical Journal Letters, writes Space.

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Scientists have been trying for years to understand the nature of dark matter, which makes up 85% of all matter in the Universe.. Dark matter is not known to be composed of known elementary particles because it does not interact with light or ordinary matter.. There is a possibility that dark matter interacts with itself.

If dark matter does not interact with ordinary matter, and stars are made of ordinary matter, then how could this substance cause a rupture in the stream of GD-1 stars? The fact is that dark matter interacts with gravity. Since gravity arises from the curvature of the fabric of space itself, and ordinary matter and light also traverse space, this means that while these components of the universe can ignore dark matter, they cannot ignore its gravitational influence.

Scientists have suggested that if there is a subhalo of denser dark matter in the large dark mother halo around the Milky Way, then it could, with its gravitational influence, destroy the structure of the stream of GD-1 stars.

But the standard model of the evolution of the Universe, called Lambda-CDM, which includes the presence of cold dark matter, does not suggest that dark matter could be dense enough to exert such a strong gravitational influence. Cold dark matter does not interact with itself.

Scientists believe that in the large halo of dark matter around the Milky Way, there is a subhalo of hot self-interacting dark matter, which has the necessary density and can cause a disruption in the structure of the flow of stars on the outskirts of our galaxy.

That is, the change in the placement of stars in space and the speed of their movement in the GD-1 stream, as the study shows, can be explained not by the influence of an unknown very dense object, as previously thought, but by the influence of very dense hot dark matter, which interacts with itself.

This means that the existing model of the evolution of the Universe, called Lambda-CDM, cannot fully describe all phenomena in space and may not be completely correct..

As Focus has already written, scientists believe that we have the wrong idea about the cores of galaxies, including the core of the Milky Way. The researchers concluded that these cores contain giant dark stars made of fuzzy dark matter..

Focus also wrote that in the distant past, the satellites of the planets of the solar system could have had the same rings as Saturn, but then they disappeared. That is, the Moon could also have rings, as another study shows.