New Hubble data suggests galaxies without dark matter really exist. The deep observations "cannot be argued with," says the study's co-author, and they "point to an alternative channel for building galaxies — and they even raise the question whether we understand what a galaxy is."

New Hubble data suggests galaxies without dark matter really exist. The deep observations "cannot be argued with," says the study's co-author, and they "point to an alternative channel for building galaxies — and they even raise the question whether we understand what a galaxy is."

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