(originally) a group of stars apparently forming one system; (now) spec. a group of three or more stars orbiting around a common centre of gravity.

Astronomy. A configuration of stars in the form of a trapezium; esp. that in the great nebula of Orion.

In Greek mythology, name of one of the twin sons (Castor and Pollux) of Tyndarus and Leda, brothers of Helena; represented in the constellation…