Astronomers have found traces of the collision of the Milky Way with the "Gaia Sausage". What is it?

L & # 39; The study was published in the Monthly Notices of the Royal Astronomical Society. ] The clashes of galaxies are frequent in our universe. For example, the Milky Way has absorbed many small galaxies in the past, and currently, for example, the Andromeda galaxy is approaching (scientists assume that the collision of our galaxy and Andromeda will take place there are about four billion d & # 39; years). The University has found evidence that about 8-10 billion years ago, the Milky Way encountered an unknown dwarf galaxy.

According to scientists, traces of this collision are found everywhere – from the bulge to the center of the galaxy and ending

Reference:

• Balge (Bulge bulge) is the accumulation of sight in the central area of ​​a spiral galaxy, which has a spherical shape; the inner, densest part of the spheroidal component of the spiral galaxy. In spiral galaxies that are observed "from the edge", the bulge looks like a spherical thickening in the center of the disc
• The galactic galaxy is an invisible component of a spherical galaxy that extends beyond from the visible part of the galaxy. It consists mainly of sparse hot gas, stars and dark matter. The latter is the largest part of the galaxy.

The collision was detected by the Gaia Space Telescope of the European Space Agency (ESA); The dwarf galaxy derived from the Milky Way called Gaia Sausage ("Gaia sausage" in English), as determined by the experts after the collision of the star of the dwarf galaxy was launched. in very long orbits and that the shape resembled a "sausage".

A small fusion of galaxies takes place continuously, but according to scientists, this fusion was probably the largest for our Galaxy: Gaia Sausage mass, including gas, stars and dark matter, exceeded the mass of the Sun. more than 10 billion times.

According to the researchers, in the results One hundred of the collision of the Milky Way disk could blow, and the Gaia Sausage remains scattered along the inner parts of the galaxy, forming a bulge in the center and the surrounding stellar halo.

In a new study, scientists also found that Gaia. This, as noted, indicates once more that the lost galaxy was very large

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