Castor Moving GroupAn extensive but physically related group of more than 50 stars, including Castor itself, Vega, Formalhaut, Alderamin, and Zubenelgenubi, that has a common motion through space. The properties of the group suggest an age for its members of 100 to 300 million years. Related category• NEBULAE AND STAR CLUSTERSAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |