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Anemic galaxy reveals deficiencies in ultra-diffuse galaxy formation theory: Strange features of a newly discovered ghostly galaxy deepen mystery of how ultra-diffuse galaxies are born

A team of astronomers have discovered a bizarre, solitary ultra-diffuse galaxy (UDG). This transparent, ghost-like galaxy, named DGSAT I, contradicts the current theory on the formation of UDGs. All previously studied UDGs have been in galaxy clusters.

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