Thursday, August 14, 2025

Mystery of the "Little Red Dots" May Finally Be Solved

Distant galaxies appear scattered across the night sky in this deep field image from the James Webb Space Telescope. The most distant galaxies appear as small, reddish dots, or the mysterious Little Red Dots (Credit : NASA, ESA, CSA, STScI, Brant Robertson (UC Santa Cruz), Ben Johnson (CfA), Sandro Tacchella (Cambridge), Marcia Rieke (University of Arizona), Daniel Eisenstein (CfA))

Deep in the darkness, tiny red specks of light have been driving astronomers to distraction. These mysterious "little red dots" discovered by the James Webb Space Telescope shouldn't exist, they’re impossibly compact yet blazingly bright, defying our understanding of how galaxies form. Now, Harvard researchers believe they've solved this billion year old puzzle with a theory involving the universe's rarest structures; dark matter halos.



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