#NGC891 (also known as #Caldwell23, #SilverSliverGalaxy, and #OuterLimitsGalaxy) is an #edge-on unbarred #spiralgalaxy with a magnitude of 10.8 and about 30 million light-years away in the #constellation #Andromeda. Accidental capture (top right corner) but was aiming at the #GalaxyClusterAbell347.