Formed between 500 and 700 million years after the Big Bang, objects at the extreme limits of human observation have showed up on the James Webb Space Telescope (JWST), designed to uncover the early life of the 13.8 billion-year-old universe.The observations are part of the first release of data from NASA's $10 billion space gadget that show galaxies more massive than had been expected for this early point in time.
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