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James Webb telescope spots Milky Way's long-lost 'twin' — and it is 'fundamentally changing our view of the early universe'
The James Webb Space Telescope has discovered Zhúlóng, a candidate for the most distant spiral galaxy in the universe. The perplexing Milky Way 'twin' dates to 1 billion years after the Big Bang, and appears too big to explain.
When astronomers used the James Webb Space Telescope( JWST) to peer deep into the early universe, they made a serendipitous discovery: a galaxy that appears to be the Milky Way's ancient twin sibling waving its spiral arms back at us. In new images that capture light emitted just 1 billion years after the Big Bang, when the universe was roughly one-fourteenth its current age, the newly discovered galaxy appears fully formed, with a central bulge of old stars, a vibrant disk of stellar newborns, and two distinct spiral arms. "This allows JWST to map large areas of the sky, which is essential for discovering massive galaxies, as they are incredibly rare," study co-author Christina Williams, an assistant astronomer at the National Science Foundation's NOIRLab and principal investigator of the PANORAMIC survey, said in the statement.
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