Gemini - Starry Sky

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The Gemini constellation is visible late at night in Autumn,
at midnight in Winter and at evening time in Spring.

(21st May – 21st June)

This constellation has been known during antiquity with a name which means “big twins”. There are different myths linked to the Gemini constellation; one myth tells the story of Castor and Pollux (the Dioscuri), two inseparable twins, born from the egg laid down by Leda, the Queen of Sparta, after her sexual union with Zeus, transformed into a swan. In another version of this myth, the mortal Castor, the son of Tindaro, husband of Leda, and the immortal Pollux, son of Zeus, fighted against Idas and Lynceus, sons of Aphareus, king of Messene. Idas hurt fatally Castor and Pollux, even if hurt, avenged his twin brother killing Lynceus. Idas was struck by Zeus's lightning. The two twins should have been divided forever because Pollux was immortal, but Pollux gave up his immortality and asked Zeus to die with Castor. The Father of Gods admitted them in the Olympus, where each one lived and died for one day. So Zeus put them in the sky as a constellation. The two twins, called “the guardian of sailors” by Poseidon, took part at the shipment of the Argonauts with Jason in the feat of the Golden Fleece.

Gemini constellation is one of few constellations which include two largest stars, that identify the head of the two twin brothers, Castor α Geminorum and Pollux, that is brighter and called β Geminorum. These stars are visible from the end of August, when rise in the East before sunrise, to the end of May, when set in the West just after the Sun. During winter, Gemini constellation is very high in the sky and then it goes in the South at the beginning of January. It shares a border with Orion, so it is very easy to find it. Gemini is a constellation of the zodiac zone and it is possible to find the Moon, the Sun and planets inside it. Gemini is the most Northern zodiac constellation, the most extended and important. Among the visible planetary nebulae, there is the Eskimo Nebula. Its name is due to the similarity with the head of an individual put into a parka’s hood.


Gemini is the sign which closes the Spring season. The transition from Spring to Summer takes place between the 21st of May to the 21st of June. In this period the features of Spring are at the maximum level, but also the features of the Summer begin to appear. Gemini is an air and mutable sign, which represents the concept of velocity and change. The hieroglyphic form of the sign is composed of two vertical signs framed with two horizontal lines. Vertical lines symbolize the positive creative energy of Aries and the receptive energy of Taurus, while the horizontal lines represent time and space where these energies show up. In ancient interpretations, Gemini sign was chosen as patron of everything linked to the element of Air, movement, rhythm, inspiration, the beginning of every birth in space and time, symbol of the relationship between past, present and future. Gemini sign is the symbol of polarity, everything is dual. Individuals born under the sign of Gemini can have both two temperaments; one is the temperament of emotional Castor, little active, emotional changing and the other one is the temperament of Pollux, little emotional, but hyperactive and with big soul’s readiness. The link with the element of Air allows these individuals to have variable mood, to be adaptable, inventive and free.


The gemstones of Gemini, ruled by Mercury, are agate, which is a stone with many virtues, useful to avoid danger, wins the earthly aversions and gains favour with love and sympathy towards the others, helps to work and concentrate. Alexandrite (the name is due to the day of the discovery of this gemstone, which is the birthdate of Alexander II) is green under natural light and it becomes red-violet under artificial light; it stimulates interior life and strengthens the courage. The essence is oregano and yellow is the colour of this sign.

“I wonder if the stars are lit up because everyone will find its own one day.”
Antoine de Saint-Exupéry
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