Crux

Crux (the cross), commonly known as the Southern Cross, is the smallest of the 88 modern constellations, but also one of the most famous. Its four brightest stars (Alpha, Beta, Gamma and Delta Crucis) appear on the flags of Australia and New Zealand. The Australian flag shows also Epsilon Crucis.

Crux was formerly part of Centaurus, and was first introduced as a separate constellation by A. Royer in 1679.