NASAのインスタグラム(nasa) - 4月3日 23時24分

Despite being less famous than their elliptical and spiral galactic cousins, irregular dwarf galaxies, such as the one captured in this Hubble Space Telescope image, are actually one of the most common types of galaxy in the universe. This dwarf galaxy is located approximately 11 million light-years away. It's diffused and disorganized appearance is characteristic of an irregular dwarf galaxy. Lacking a distinctive structure or shape, irregular dwarf galaxies are often chaotic in appearance, with neither a nuclear bulge - a huge, tightly packed central group of stars - nor any trace of spiral arms - regions of stars extending from the center of the galaxy. Astronomers suspect that some irregular dwarf galaxies were once spiral or elliptical galaxies, but were later deformed by the gravitational pull of nearby objects.

Image Credit: ESA/Hubble and NASA; Acknowledgement: Judy Schmidt

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