Westerhout 4 is a group of four stars located in the constellation of Cassiopeia. It is notable for being one of the closest known star clusters to Earth, situated approximately 2,300 light-years away. The cluster is composed of young, hot stars that are still in the early stages of their development. The stars in Westerhout 4 are part of a larger region of star formation, which includes molecular clouds and other stellar nurseries. This area is of great interest to astronomers studying the processes of star formation and the evolution of stellar systems.