Orion is a well-known constellation in the northern hemisphere with heavily-studied stars and features, named after the hunter from Greek mythology, Orion.
Some prominent stars:
Among the other "stars" is the Orion Nebula, the middle of three stars descending from the belt, seen as Orion's sword.
Herschel Orion Protostar Survey (HOPS)
HII Region (HII)
Orion Nebula (M42)