Zet

Its story

Zeta Coronae Australis traces the small arc of the Southern Crown, the austral counterpart to Corona Borealis, set beside the bright body of Sagittarius. At 193 light-years, it is a white A-type star, a quiet member of a curving figure that ancient astronomers already recognised —Ptolemy listed it in his Almagest. Its brightness is modest, yet it defines the exact geometry of the half-ring.