The brightest star in the night sky and part of one of Earth’s nearest neighbor’s, the Sirius system.

From the Ra Contact: The star system where the entities that took Charlie came from; these entities evolved from second-density vegetation forms and developed a harmonious society with accelerated evolution and now are third density beings of a fairly high order who have formed a social memory complex; in order to become balanced, they need to investigate movements of all kinds, especially bellicosity, thus using Charlie’s life experience, concentrating upon his war experiences (see also “Charlie Hickson”).

Reference

8.22, 38.7-8, 51.2