what is hydrus?
Small constellation in the deep southern sky.
Introduction
Hydrus is a small constellation in the deep southern sky.
A small constellation in the deep southern sky. A small constellation in the deep southern sky. Hydrus is a small constellation in the deep southern sky.
Hydrus Hydrus Hydrus
Introduction Introduction Introduction
Hydrus is a small constellation in the deep southern sky. Hydrus is a small constellation in the deep southern sky. Hydrus is a small constellation in the deep southern sky. 
wiki:7673493
Hydrus [SEP] Introduction
Hydrus is a small constellation in the deep southern sky. It was one of twelve constellations created by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman and it first appeared on a 35-cm (14 in) diameter celestial globe published in late 1597 (or early 1598) in Amsterdam by Plancius and Jodocus Hondius. The first depiction of this constellation in a celestial atlas was in Johann Bayer's Uranometria of 1603. The French explorer and astronomer Nicolas Louis de Lacaille charted the brighter stars and gave their Bayer designations in 1756. Its name means "male water snake", as opposed to Hydra, a much larger constellation that represents a female water snake.