One of Pluto's moons.
One of the Saronic Islands in the Aegean Sea.
A spring constellation of the northern sky, said to resemble a serpent. It lies just south of the zodiac and contains the star Alphard.
A mythological serpent with many heads, slain by Hercules as one of his twelve labours.
The moon of the dwarf planet Gonggong.
A hydra-like monster which terrorized the world in prehistory.