(astronomy) A large summer constellation of the northern sky said to resemble a snake. It is the only constellation consisting of two parts (Serpens Caput and Serpens Cauda) separated by the constellation Ophiuchus, representing the snake handler Asclepius.

(astronomy) The eastern half of the northern constellation Serpens, said to resemble a snake. It is said to represent the tail end of the snake.

(astronomy) The western half of the northern constellation Serpens, said to resemble a snake. It is said to represent the head end of the snake.