Astronomers say they have solved an outstanding problem that challenged our understanding of how the universe evolved—the spatial distribution of faint satellite galaxies orbiting the Milky Way.
These satellite galaxies exhibit a bizarre alignment—they seem to lie on an enormous thin rotating plane—called the “plane of satellites.”
This seemingly unlikely arrangement had puzzled astronomers for over 50 years, leading many to question the validity of the standard cosmological model that seeks to explain how the universe came to look as it does today.
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