The Milky Way gobbled up a galaxy one quarter of its mass 10 billion years ago in a 'violent collision' that didn't fully settle for eons, ...
PARIS: The Milky Way gobbled up a galaxy one quarter of its mass 10 billion years ago in a"violent collision" that didn't fully settle for eons, astronomers said in new research published Monday .
They identified two distinct stellar sets - one"bluer" and containing less metal, one"redder" containing more. "The novelty of our work is that we have been able to assign precise ages to the stars that belong to the galaxies that merged and, by knowing these ages, when the merger took place," Carme Gallart, lead author of the study published in Nature Astronomy, told AFP.She said the collision, around 10 billion years ago, would have taken millions of years to unfold.
The team believes remnants of the dwarf galaxy, known as Gaia-Enceladus, eventually formed the halo of the present-day Milky Way.
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