News > Huge arc of galaxies is surprising and puzzling cosmologists
Huge arc of galaxies is surprising and puzzling cosmologists
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11/07/2021 08:25 AM | Click to read full article
A long string of galaxies appears to form an arc stretching more than 3 billion light-years across the distant universe.
If the arc turns out to be real, it would challenge a basic idea about how the cosmos is structured. It’s known as the “cosmological principle.”