Discovered by Caroline Herschel in 1783

NGC 891 is a spiral galaxy located approximately 10 million light years from earth.  It is thought to be much like our Milky Way.  It is seen edge on with a prominent band of dust along the plane of its disk.  The central bulge is a decidedly yellow hue indicating an abundance of older stars.  The disk is of a bluish hue toward the outer portions. This would indicate younger/hotter stars.  A small galaxy can be seen under the disk about a third of the way from the top end.  This is either a background galaxy or perhaps a very small companion galaxy.