Combining observations from the NOEMA interferometer and the James Webb Space Telescope (JWST), astronomers have discovered a stellar bar in GN20, a massive, gas-rich starburst galaxy observed as it was only about 1.5 billion years after the Big Bang. The discovery challenges classical models of galaxy evolution, which suggest that the large gas reservoirs common in the early Universe should inhibit bar formation. The NOEMA observations revealed…
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