NGC 891

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NGC 891 (also known as Caldwell 23 or Silver Sliver Galaxy) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster. It has an H II nucleus. NGC 891 looks as the Milky Way would look like when viewed edge-on (some astronomers have even noted how similar to NGC 891 our galaxy looks as seen from the Southern Hemisphere) and, in fact, both galaxies are considered very similar in terms of luminosity and size, studies of the dynamics of its molecular hydrogen have also proven the likely presence of a central bar.

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