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James Webb telescope finds massive galaxies dating back to beginning of universe

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Images of six candidate massive galaxies, seen 500-800 million years after the Big Bang. One of the sources (bottom left) could contain as many stars as our present-day Milky Way, but is 30 times more compact.

These images are a composite of separate (NASA, ESA, CSA, I. Labbe (Swinburne University of Technology).

Image processing: G. Brammer (Niels Bohr Institute’s Cosmic Dawn Center at the University of Copenhagen)CAPE CANAVERAL, Fla. - Astronomers have discovered what appear to be massive galaxies dating back to within 600 million years of the Big Bang, suggesting the early universe may have had a stellar fast-track that produced these "monsters."While the new James Webb Space Telescope has spotted even older galaxies, dating to within a mere 300 million years of the beginning of the universe, it’s the size and maturity of these six apparent mega-galaxies that stun scientists.

They reported their findings Wednesday.Lead researcher Ivo Labbe of Australia’s Swinburne University of Technology and his team expected to find little baby galaxies this close to the dawn of the universe — not these whoppers."While most galaxies in this era are still small and only gradually growing larger over time," he said in an email, "there are a few monsters that fast-track to maturity.

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