Disc galaxy

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The Sculptor Galaxy (NGC 253) is a disk galaxy

A disc galaxy is a galaxy characterized by a disc, a flattened circular volume of stars. These galaxies may or may not include a central non-disc-like region (a galactic bulge).

Junko Ueda[who?] observed that galaxy collisions result in disc galaxies, within 40 million light years from the Earth. While the galaxies are interacting, they change shape in cosmic time as they merge.[1]

Disc galaxy types include:

Galaxies that are not disc types include: