Here's why:
* Ancient Origins: Gemini is one of the oldest recognized constellations, dating back to ancient Babylonian and Sumerian cultures.
* Mythology: The constellation's name comes from the twins Castor and Pollux in Greek mythology.
* Star Patterns: The stars that make up Gemini have always been visible in the night sky, and their distinctive pattern was easily recognizable to early civilizations.
So, while there's no specific year of discovery, Gemini has been a part of human understanding of the night sky for millennia.