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The Milky Way is larger than expected, there is a lot of dark matter
the LONDON - The real size of our galaxy may be much larger than previously estimated - arriving to cover a distance of 1.9 million light-years. And for the most part would be formed by dark matter. The support astronomers at the University of Durham in an article published on arXiv, in which report the results of their analysis on the disk of the Milky Way galaxy, composed of stars, planets, black holes and celestial bodies, which experts believed to extend to 260 thousand light years. "Most of our galaxy consists of dark matter is not detectable directly, but only through the impact that its gravity has on other objects," says Alis Deason , who led the research.

"We have deduced that the Milky Way is surrounded by a halo of dark matter after detecting that the stars on the outer edge of the disc move faster than they should according to the calculations made based on the presence of matter detected", continues the researcher, explaining that the border of our galaxy have been established on the basis of the way in which the dark matter influence the celestial bodies.
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