- Triangulum Australe is a small constellation in the far Southern Celestial Hemisphere. Its name is Latin for “the southern triangle”, which distinguishes it from Triangulum in the northern sky and is derived from the acute, almost equilateral pattern of its three brightest stars. It was first depicted on a celestial globe as Triangulus Antarcticus by Petrus Plancius in 1589, and later with more accuracy and its current name by Johann Bayer in his 1603 Uranometria. The French explorer and astronomer Nicolas Louis de Lacaille charted and gave the brighter stars their Bayer designations in 1756.
- Star Tales - Serpens (ianridpath.com)
This constellation is unique, for it is divided into two parts – Serpens Caput, the head, and Serpens Cauda, the tail. Nevertheless, astronomers regard it as a single constellation. Serpens represents a huge snake held by the constellation Ophiuchus. Its Greek name was Ὄφις (Ophis), but in the Almagest Ptolemy gave it as Ὄφις Ὀφιούχου (Ophis Ophiouchou), i.e. the serpent of the serpent-holder, presumably to prevent confusion with the other celestial serpents Draco and Hydra.
