The history of the Milky Way has changed after the impact with the "galaxy of sausage"

The Milky Way suffered a great shock between 8,000 and 10,000 million years ago against a smaller object, nicknamed the "Galaxy of sausages". This collision was a decisive event in the beginnings of our galaxy to redefine its structure .

Cosmic shock molded both the inner core and the outer halo of the Milky Way, according to a series of studies by an international group of scientists published in Monthly Notices from the Royal Astronomical Society [19659004] The Letters of the Astrophysical Journal and arXiv.org .

Astronomers consider that between 8,000 and 10,000 million years ago an unknown dwarf galaxy rushed into the Milky Way and did not survive the Impact, it broke quickly and its remains are still around us.

the dwarf galaxy, which allowed its stars to move in very radial orbits, "which are long and narrow like needles, explained in a statement Vasily Belokurov University of Cambridge (United Kingdom) and the Flatiron Institute of New York

The trajectory of these stars brings them very close to the center of the Milky Way, which for Belokurov is a "telltale sign that the dwarf galaxy has entered a team used data from the Gaia satellite of the European Space Agency which mapped the contents of our galaxy and recorded the positions of the stars. [19659002] The trajectories of the stars after this collision earned them the nickname "Gaia sausage", explained Wyn Evans of the University of Cambridge, because by tracing the velocities and trajectories of the stars, the shape

Our galaxy continued to collide with other galaxies, such as the "insignificant galaxy of the Dwarf Sagittarius", but the "sausage galaxy" was much more massive.

When this galaxy Nana crashed into the Milky Way young "her penetrating career caused a lot of chaos." The Milky Way disk probably inflated or even fractured ] after the impact and should have pushed back. "

Astronomers have indicated that the evidence of remodeling of our galaxy is seen in the trajectory of the stars inherited from this" galaxy of sausage "(EFE)