New wide map of boundaries Milky Way Found the trail of a small induced star Galaxy That is, in about 2,000 million years, it will collide with ours and, in addition, may provide new evidence for the theory of dark matter.
The study, published in Natural, Used data from the Kia mission from the European Space Agency (ESA) and NASA’s Neovis telescope from 2009 to 2018 to draw a map of the outer part of our galaxy, known as the galaxy halo and the number of stars.
However, experts believe it may be Large reservoir of dark matter, A substance still unknown, which will form all the masses in the universe, but in them, until now, only its gravitational effects have been detected.
A study led by astronomers at the Harvard-Smithsonian Astronomical Center reveals that a small galaxy called the Giant Magellanic Cloud (GNM) has traveled through the galaxy. Milky Way Like a ship through the water, it forms the path of the stars behind it. ”
Previous studies indicate the existence of this Stella, and the current map confirms its existence, providing a detailed view of its shape, size, and location.
The dark thing is scaffolding
This disturbance in the halo also provides an opportunity for astronomers to study The dark thing, They believe they are like a kind of scaffolding built of galaxies, without which, they would fly away as they rotate.
Considered, if there is a dark matter in the Milky Way halo, in the passage Large Magellanic cloud It should leave a path of dark matter in that area, the Harvard-Smithsonian Astronomical Center explains in a statement.
The interaction between a dark object and a large magelanic cloud has a major impact on our galaxy because the gravitational pull of the dark object pulls it slower.
This makes the orbit of the dwarf galaxy smaller and smaller, which eventually collides with the Milky Way 2,000 million years.
The authors of the work believe that the new map – along with additional data and theoretical analysis – may provide evidence for different theories about the nature of the dark matter, whether it is made up of particles like conventional matter, and what their properties are.