Gemini - the third sign in the zodiac, Gemini. In the tropical zodiac, the sun passes through this constellation between May 21 and June 21. Gemini is represented by twins castor and Pollux. The symbol of twins is based on Dioscuri, a mortal and an immortal, who was granted the Banxian after the death of the mortal brother (Castor).

After the zodiac, NASA called their two man capsule the Gemini project, because the spacecraft can carry two astronauts.