IC1805 Nebula is in the constellation Cassiopeia. In the central part of the cloud shines Melotte 15, a cluster of giant stars, young and very hot. The ultraviolet radiation from massive stars sculpted this fantastic gas column. Is commonly identified with the name of Melotte 15. The age of the cluster is estimated at a million and a half years and its distance from Earth, about 7,500 light years.