These dwarf galaxies in the Hydra cluster are baffling scientists: 'We found something we didn't expect' - Space.com

"By putting together the individual results, like in a puzzle, we reconstruct the formation history of these systems."Astronomers have discovered something surprising about the universe's smallest and faintest class of galaxies: Ultra-Diffuse Galaxies (UDGs). A research team studying these galaxies found that aroun…