The James Webb Space Telescope has discovered massive, fully-formed galaxies when the universe was only 300 million years old (about 2% of its 13.8 billion-year age), contradicting the established understanding that galaxy formation requires hundreds of millions of years for gas to collapse into stars and then into galaxies, suggesting either our understanding of galaxy formation is fundamentally wrong or some unknown mechanism accelerated the early universe.
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James Webb just broke the universe. ๐ญ #jameswebb #spacefacts #cosmologyAdded:
James Webb just broke cosmology. It found a galaxy from when the universe was only 300 million years old. The universe is 13.8 billion years old. This galaxy >> [music] >> formed at 2% of that. Galaxies aren't supposed to form that fast. It takes hundreds of millions of years for gas to collapse into stars, for stars to become galaxies.
This galaxy [music] skipped all of that.
Already massive, already ancient, before the universe was even an infant.
Scientists called it impossible, then found another, then another.
Dozens of galaxies that shouldn't exist this early.
Either our understanding of how galaxies form is completely wrong, or something [music] was accelerating the early universe in ways nobody predicted. 60 years of cosmology, Webb just cracked it.
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