The Gemini story originates from Greek mythology and involves twin brothers, Castor and Pollux. While Castor was mortal, Pollux was immortal due to his divine heritage. When Castor passed away, Pollux was inconsolable. He pleaded with the gods to share his immortality with his brother, resulting in an arrangement where the brothers spent alternating days in Mount Olympus and the underworld. This eternal bond between the twins led to their immortalization as the constellation Gemini. The stars Castor and Pollux represent the enduring unity of these brothers even beyond life and death.