The Double Cluster is more formally known as h and Chi Persei, or NGC 884 and NGC 869. It resides in the northern part of the constellation Perseus, quite close to the constellation Cassiopeia the Queen.
The Double Cluster has to rate as one of the most magnificient deep-sky objects NOT to have been listed in the famous Messier catalogue. Of course, Charles Messier (1730-1817) was only interested in cataloguing deep-sky objects that could be mistaken for comets. Apparently, he thought nobody would see this pair of glittery clusters as a comet in the sky.
Although considered a deep-sky jewel, the Double Cluster is visible to the unaided eye in a dark country sky. If you zoom in on these rather feeble-looking stellar blobs with binoculars or a wide view telescope, they all of a sudden turn into two glorious star clusters.