A new dwarf galaxy was accidentally discovered when scientists aimed a telescope at the star system SPT0418-47, which is located at a distance of 12 billion light years, that is, astronomers see it as it was less than two billion years after the Big Bang. Its light is bent and amplified by gravitational lensing.
At the edge of SPT0418-47, astronomers spotted a patch of light. It was another dwarf galaxy, designated SPT0418-SE.
Image analysis shows that SPT0418-SE is 16,000 light-years away from SPT0418-47, so the two star systems are merging, or at least gravitationally interacting.
But the most interesting thing is that SPT0418-SE is unusually rich in a variety of chemical elements.
And this is strange, because for their formation, stars are needed that explode as supernovae. And this means that several generations of stars should have changed in the dwarf system.
Scientists suggest that the process of star formation in the two galaxies began very early and proceeded extremely efficiently.
Literally in a few hundred million years, 3-4 generations of luminaries have changed, which have enriched the space with heavy elements.
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