Ultra diffuse galaxy
= Ultra diffuse galaxy
{wiki=Ultra_diffuse_galaxy}
Ultra diffuse galaxies (UDGs) are a class of galaxies that are characterized by their low surface brightness and large size. Despite having a similar mass to typical galaxies, UDGs have a flattened, diffuse structure with a low density of stars spread over a large area. They are often difficult to detect with standard observational techniques due to their faintness and diffusive nature.