Orion is a winter constellation visible in the northern hemisphere representing a Greek mythological hunter. It contains seven bright stars that make up its belt and limbs, and is associated with the story of Orion's death at the hands of the giant scorpion. The document discusses the mythological origins of Orion, where it can be seen in the night sky, its main stars including Rigel and GJ3379, and surrounding constellations like Lepus the hare and Eridanus the hunting dogs.