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History
Gemini (constellation)
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Gemini is one of the constellations of the zodiac and is located in the northern celestial hemisphere. It was one of the 48 constellations described by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations today. Its name is Latin for twins, and it is associated with the twins Castor and Pollux in Greek mythology. Its old astronomical symbol is (♊︎).
The constellation Gemini as it can be seen with the unaided eye, with added connecting lines.
The constellation Gemini as it can be seen with the unaided eye, with added connecting lines.
AFGL 5180 - Through the Clouds.
AFGL 5180 - Through the Clouds.
Gemini as depicted in Urania's Mirror, a set of constellation cards published in London c.1825.
Gemini as depicted in Urania's Mirror, a set of constellation cards published in London c.1825.
Sculpture showing Castor and Pollux, the legend behind the third astrological sign in the Zodiac and the constellation of Gemini
Sculpture showing Castor and Pollux, the legend behind the third astrological sign in the Zodiac and the constellation of Gemini
Zodiac
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The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south of the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year. Also within this zodiac belt appear the Moon and the brightest planets, along their orbital planes. The zodiac is divided along the ecliptic into 12 equal parts ("signs"), each occupying 30° of celestial longitude. These signs roughly correspond to the astronomical constellations with the following modern names: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces.
The Earth's orbit around the Sun causes the apparent motion of the latter along the ecliptic (red). Earth is axially tilted 23.4° relative to this pla
The Earth's orbit around the Sun causes the apparent motion of the latter along the ecliptic (red). Earth is axially tilted 23.4° relative to this plane; its equator, extended to the stars, is shown in light blue.
Astrophotos of the twelve zodiac constellations
Astrophotos of the twelve zodiac constellations
A sixth-century mosaic zodiac wheel in synagogue Beth Alpha incorporating Greek-Byzantine elements, Israel
A sixth-century mosaic zodiac wheel in synagogue Beth Alpha incorporating Greek-Byzantine elements, Israel
The 1st century BC Dendera zodiac (19th-century engraving)
The 1st century BC Dendera zodiac (19th-century engraving)