The myth is that Zeus saw Leda and fell in love with her and turned himself into a beautiful swan and had Leda fall in love with her. Later she laid 2 eggs one Pollux and one Castor and his sister. Well Castor was only half mortal and Pollux was fully mortal. But even though they were only half brothers they looked like each other and did everything together. They both were good athletes and went on many adventures. When Castor died he went to the underworld. Pollux went to live at Mt. Olympus. They missed each other so much that Pollux begged and begged Zeus to give Castor half of his immortally. Zeus did and Castor came back.
Later they were both hung by Zeus and now are constellations.
* Gemini is one of the Zodiac constellations
* Gemini is fairly easy to spot
* It is located northeast of Orin
* It is between Taurus and Cancer on the elliptic