12 Constellations That Inspired the Zodiac — and the Astronomers Who Mapped Them

3. Gemini: The Twins

Gemini, symbolized by the twins Castor and Pollux, has been significant in both Greek mythology and astrological tradition. Ptolemy’s Almagest placed Gemini among the 48 original constellations. Modern astronomers continue to use these reference points thanks to meticulous ancient mapping. Details on its stars and myth can be found at the International Astronomical Union: www.iau.org/public/themes/constellations/#gem