Gemini (♊︎; /ˈdʒɛmɪnaɪ/ JEM-in-eye[2] Greek: Δίδυμοι, romanized: Dídymoi, Latin for "twins") is the third astrological sign in the zodiac.

[3] Gemini is represented by the twins, Castor and Pollux,[4] known as the Dioscuri in Greek mythology.

[5] In Greek mythology, Gemini is associated with the myth of Castor and Pollux, a pair of twins conceived by different fathers.

NASA named its two-person space capsule Project Gemini after the zodiac sign because the spacecraft could carry two astronauts.

[6] Google's next-generation AI model announced on December 6, 2023, is named Gemini.