Hydra is a constellation that has parts in the northern sky and parts in the southern sky. It is the biggest constellation. It represents a water snake. The astronomer named Ptolemy listed Hydra when he made a list of 48 constellations. It is also one of the 88 modern constellations that were made by the International Astronomical Union.
|Symbolism||the sea serpent|
|Area||1303 sq. deg. (1st)|
|Stars with planets||16|
|Stars brighter than 3.00m||2|
|Stars within 10.00 pc (32.62 ly)||4|
|Brightest star||Alphard (α Hya) (1.98m)|
|Visible at latitudes between +54° and −83°.|
Best visible at 21:00 (9 p.m.) during the month of April.
Even though Hydra is a very big constellation, it only has one bright star. This star is named Alphard. Alphard means "the solitary one" in Arabic. Hydra actually has little to identify it exept for a cluster of stars at its head.