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A group of astronomers from the University of Michigan in the United States studied the fusion period between the Andromeda galaxy and about four billion years ago. The investigation began when a "satellite" galaxy, known as the M32, was taken for a small elliptical galaxy that actually corresponds to a galaxy core.
The authors point out, among other signs of fusion, that an explosion of new star formation coincides with the 2000 million year period, when galaxies will have joined forces.
This study could change the idea of what happens when two galaxies merge, arguing that Andromeda has retained its spiral shape, with characteristic arms similar to ours.
Until now, it was thought that Andromeda would have a much larger dimension than the Milky Way, ultimately absorbing it when collision between galaxies occurred. However, an article published in Monthly Notices of the Royal Astronomical Society in February this year, cited by El País asks what the consequences will be when galaxies will find, a time that will arrive in the 4000 million years.
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