Melotte 15
Although it might take a moment to discern, this image is of the magnitude 7.9 open cluster Melotte 15, also known as Collinder 26. It lies within the Heart Nebula (IC 1805) in the constellation Cassiopeia the Queen. Although the nebulosity dominates this image, the two dozen brightest stars belong to the cluster.>/small>by Manuel Fernández Suárez from León, Spain