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Viewings: 4098New, but the most accurate study of the movement of the stars in our milky Way galaxy, has not set the expected traces of a large number of dark matter near the Sun, reported by scientists from the European southern Observatory (ESO).
According to conventional theory, our stellar neighborhood should be shrouded in mysterious invisible substance - dark matter that can only be detected by gravitational influence of nearby objects. However, a group of astronomers from the Observatory in Chile have found evidence that all the accepted theory in this matter is not fully correspond to reality. This means that attempts to detect dark matter particles directly on the Earth, will perish.
An international group of experts in a new study using the 2.2-meter telescope of ESO in the La Silla Observatory and other telescopes, measured movements of more than 400 stars remote to 13 thousand light years from our Sun. Based on the collected data, astronomers have calculated the mass of material near space of the Sun and it was more than four times than that observed previously.
According to responsible for research, the number of mass that can be observed in the area around the Sun is consistent with what can be observed stars, dust and gases, but it does not leave even the minimum space for additional substances - dark matter, which everyone expected to see. According to their calculations, measurements were clearly show the presence of a mass of invisible matter, however, this indicator was not simple.
Dark matter is the mysterious substance that cannot be seen, however, her presence presumably can be detected through the gravitational influence of the surrounding materials. Attempts to detect dark matter is one of the components in the studies that can give an answer to the question why the outer regions of galaxies, including our own, rotate very quickly. Thus, if in galaxies is no dark matter with gravity, which keeps the stars together, the question arises as to why under the action of centrifugal force, the stars do not leave their limits and not moved freely through the Universe.
Dark matter in the light of the latest issue is one of the key components of the theory, which explains the emergence and evolution of galaxies.
Today, scientists accepted the idea that dark matter is 80% of the total mass of the Universe, however, its nature is not understandable. All previous attempts to detect dark matter in the laboratories of the Earth was not successful. In accordance with the current model of formation and rotation of galaxies to our milky Way must be surrounded by a kind of halo dark matter. They can't predict what forms halo should be, but it is expected that near the Sun must be sufficiently large amount of dark matter. However, despite the results of a new study that found no dark matter, they show that the halo can be very unexpected forms, for example, highly elongated.
The results obtained by scientists from the European southern Observatory (ESO) are the opposite, with accepted models of galaxy formation. Further research, including the mission of the ESA - Gaia will indicate the progress made on this topic.
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