A Grand Design Galaxy - NGC1232 (Geoff Healey)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: NGC 1232

A Grand Design Galaxy - NGC1232, Geoff Healey

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A Grand Design Galaxy - NGC1232

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A Grand Design Galaxy - NGC1232

NGC 1232 is an intermediate spiral galaxy about 60 million light-years away in the constellation Eridanus. It was discovered by German-British astronomer William Herschel on 20 October 1784. It is dominated by millions of bright stars and dark dust, in spiral arms rotating about the center. Open clusters containing bright blue stars are sprinkled along these spiral arms, with dark lanes of dense interstellar dust between. Less visible are dimmer stars and interstellar gas, comprising such a high mass that they dominate the dynamics of the inner galaxy. Not visible is matter of unknown form called dark matter, needed to explain the motions of the visible material in the outer galaxy. The galaxy is approximately 200,000 light-years across, in between the sizes of the Andromeda Galaxy and our home galaxy, the Milky Way. The galaxy's spiral arms are not smooth and perturbed, leading to some suggesting a collision with a dwarf galaxy. However, some studies doubt this suggestion.NGC 1232 is a face-on spiral galaxy. It can be technically considered a Grand-design galaxy and is considered a prototype for multi-arm spiral galaxies. Its galactic bulge is small. While NGC 1232 is classified as an intermediate spiral galaxy, the bulge shows hints of a galactic bar. Courtesy Wiki

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A Grand Design Galaxy - NGC1232

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