UCLA astrophysicists have used new simulations to uncover that the earliest galaxies may have been smaller and brighter than previously believed, challenging current dark matter theories. By incorporating interactions between gas and dark matter, their research suggests that these bright dwarf galaxies, if found by the James Webb Space Telescope, could validate existing models. However, their absence would prompt a reevaluation of our understanding of dark matter and the universe’s formation. A composite of Stephan’s Quintet, a visual grouping of five galaxies, constructed from almost 1,000 separate image files from the James Webb Space Telescope. UCLA astrophysicists believe if cold dark matter theories are correct, the Webb telescope should find tiny, bright galaxies of the early universe. Credit: NASA, ESA, CSA, STScI
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