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Our galaxy and a smaller galaxy with the imaginary name "Succulent" collided frontally eight to ten billion years ago. From the cosmic conflict, a decisive event in the history of our galaxy, it has taken its current form, according to astronomers' estimates.
The dwarf galaxy "Succulent" did not survive the event because it quickly dissipated, and its remains are now scattered around our galaxy. But our own galaxy also bears traces of this dramatic conflict both in the center and in its outer halo
The researchers, led by Vasily Belokurov of the University of Cambridge and the Center for Computational Astrophysics of New York Flatiron Institute, published in the monthly records of the British Royal Astronomical Society and the Astrophysical Journal Letters
.The new badessments were based on the study of Gaia (Gaia) satellite data from the 39, European Space Agency. ESA), which accurately records the orbits of the stars during their journey through our galaxy. By using appropriate mathematical calculations, astronomers believe that they can draw good conclusions about the distant past of our galaxy
The shape of the current orbits of the stars of the galaxy, now wandering in our own galaxy, has given the first the nickname "The sausage of Gaia". This galaxy dwarf was the last great fusion of another galaxy with ours.
Our galaxy continues to collide with other galaxies, such as the miniature "Sagittarius", but the "sausage" was much larger with a total estimated mbad (stars, gas and dark matter) of at least ten billions of times our Sun. When it fell on our galaxy, it fell into a chaotic state and it is estimated that its disk was cracked and needs to be rebuilt along the way.
Among other things, astronomers have found that at least eight large globular clusters in our galaxy are inherited "from the" sausage "
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