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By: Rola Helmy and Jina Boktor

rola helmy

on 15 October 2012

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Transcript of Gemini

Gemini is a zodiacal constellation representing the twin brothers Castor and Pollux. Both were mothered by Leda, and were therefore brothers of Helen, but they had different fathers: In one night, Leda was made pregnant both by Jupiter in the form of a swan and by her husband, the king Tyndarus of Sparta. Pollux, as the son of a god, was immortal and was renowned for his strength, while his mortal brother Castor was famous for his skill with horses. Both brothers voyaged in search of the Golden Fleece as Argonauts, and then fought in the Trojan War to bring their sister home to her husband Menelaus. They are traditionally depicted as armed with spears and riding a matched pair of snow-white horses. The most common explanation for their presence in the heavens is that Pollux was overcome with sorrow when his mortal brother died, and begged Jupiter to allow him to share his immortality. Jupiter, acknowledging the heroism of both brothers, consented and reunited the pair in the heavens.Castor and Pollux were unique among those placed in the sky in that they are not represented merely as a constellation but as actual stars which mark the twin's heads in the constellation. Castor is bright white binary star, while Pollux is orange. They may be found between Cancer and Taurus This zodiacal constellation represents the twins Castor and Polydeuces (Pollux to the Romans). These were born from an egg after their mother, Leda, Queen of Sparta, had been seduced by Zeus, disguised as a swan. Although only half brothers, Castor, the mortal son of Leda's husband, King Tyndareus, and Polydeuces, immortal son of Zeus, were extremely close and together took part in many adventures. Sadly, on one of these Castor was killed. Polydeuces avenged Castor's murder, but was so overcome with grief that he begged to be allowed to be with his brother in the underworld. Zeus, knowing the strength of their feelings, and for once showing some compassion, granted this request. He placed the twins side by side in the heavens so that they could alternate their time together between Hades and the home of the gods CONSTELLATION OF GEMINI STAR MAP The two most shinning stars in the constellaion of Gemini • Symbolic Image : Twins
• Right ascension : 7
• Declination: +20
• Quadrant : M35
• Latitudes visible at : +90° and -60°
• Time best visible: 2100 hours or 9p.m, in February.
• Area of sky covered: 514 square degree• Rank in constellation size: 30th
• Brightest star: Pollux (βgem) (1.16m)
• Nearest star: GJ 251 (18.2 ly)
• Position in the Zodiac: Third
• Ruling Planet : Mercury Gemini is between Taurus and cancer Constellation of Gemini An animation of the constellation Gemini (center), "the twins", shows two parallel stick figures. Gemini is associated with the myth of Castor and Polydeuces (also known as Pollux), collectively known as the Abbreviation: Gem Genitive: Geminorum
Right Ascension: 7.19 hours Declination: 22.69 degrees
Area in Square Degrees: 514
Crosses Meridian: 9 PM, February 20 Gemini, the Twins, is visible in the northern hemisphere from November through April. The southern hemisphere can view it from December through March. Pollux. Pollux is the brighter of the two with a magnitude of 1.14. Castor is a binary system with a slight dimmer magnitude of 1.98. Gemini contains one Messier object. Known as M35, it is a fine open cluster of about 100 stars. This cluster can easily be observed with binoculars. 3- Pollux & 2- Castor Sky chart of the constellation Gemini the Twins * Pollux (β Gem, β Geminorum, Beta Geminorum) is a star in the northern constellation of Gemini, the Twins. he Greek letter Beta is normally reserved for the second-brightest star in a constellation. It is an evolved giant star with an orange hue. At an apparent visual magnitude of 1.1. Pollux is the brightest star in the constellation; brighter even than its neighbor Castor (Alpha Geminorum). This star is larger than the Sun, with about two times its mass and almost nine times its radius. Pollux is the brighter of two bright stars in the constellation Gemini the Twins. It is the 17th brightest star in our sky, Pollux is about 31 times as bright as our sun in visible light, our sky. Pollux’s position is RA: 7h 45m 20s, dec: +28° 01′ 35″. Spectral Class: k0 III- "K0" Some what cooler than the sun. Pollux and Castor; the two most shinning stars in the constellation of Gemini Castor is the second brightest star in the constellation of Gemini. Both Pollux and Castor are two of the brightest stars in our night sky! Castor has "alpha" unlike Pollux has "beta" alpha is actullay fainter than beta. Castor is 49.8 light years away from Earth. Caster's position: 7h, 36m, dec + 31°.Castor, one of two bright star in the constellation Gemini, is a famous multiple star system. It contains three pairs of binary stars all revolving in a complex way around a common center of mass. In other words, the single bright light we see as Castor is really six stars in one. Spectral Class: A1 V. Pollux is about 31 times as bright as our sun in visible light Northern Hemisphere Constellation of Gemini MOON Pollux Caster All stars that are shown in our night sky1 Gemini's Mythology BY: ROLA HELMY AND JINA BOKTOR THANK YOU Gemini is invisible during this periood time of the year; October 13, 2012. 7:49 PM. Saturday night! Video; Gemini Constellation
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