Collection: Zodiac - Gemini Constellation and Astrological Sign

Gemini, in astronomy, zodiacal constellation lying in the northern sky between Cancer and Taurus, at about 7 hours right ascension and 22° north declination. Its brightest stars are Castor and Pollux (Alpha and Beta Geminorum); Pollux is the brighter of the two, with a magnitude of 1.15, and is the 17th brightest star in the sky. The summer solstice, the northernmost point reached by the Sun in its annual apparent journey among the stars, lies in Gemini. This constellation also contains the isolated pulsar Geminga.

Gemini
Gemini Astronomical chart showing the twins Castor and Pollux forming the constellation Gemini; hand-colored etching by Sidney Hall from Urania's Mirror, 1825.

In astrology, Gemini is the third sign of the zodiac, considered as governing the period from about May 21 to about June 21. It is represented by a set of twins (or in Egyptian astrology by a pair of goats and in Arabian astrology by a pair of peacocks). In addition to their identification as Castor and Pollux, the twins have also been related to other celebrated pairs, such as the younger and older Horus or Romulus and Remus.

 Aries (Ram): March 21–April 19

 Taurus (Bull): April 20–May 20

 Gemini (Twins): May 21–June 21

 Cancer (Crab): June 22–July 22

 Leo (Lion): July 23–August 22

 Virgo (Virgin): August 23–September 22

 Libra (Balance): September 23–October 23

 Scorpius (Scorpion): October 24–November 21

 Sagittarius (Archer): November 22–December 21

 Capricornus (Goat): December 22–January 19

 Aquarius (Water Bearer): January 20–February 18

 Pisces (Fish): February 19–March 20