Discover the Night Sky
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GEMINI

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Gemini is one of the constellations of the zodiac and is located in the northern celestial hemisphere. It was already known in the ancient times, and was associated with the twins Castor and Pollux in the Greco-Roman mythology. Gemini is prominent in the winter sky of the northern hemisphere and is visible the entire night in December–January. It also hosts the radiant for Geminids, a bright meteor shower that peaks on December 13–14 every year.

The two most prominent stars of the constellation, today called as Castor and Pollux were always regarded as siblings or partners throughout history. In Babylonian astronomy, the stars Castor and Pollux were known as the Great Twins who were regarded as minor gods. In the Greek legend Leda, the wife of Tyndareus was seduced by Zeus in the form of a swan (reference to Cygnus), who gave birth to the twins Castor and Pollux. Castor was mortal, while Pollux immortal, yet Pollux didn't want to be separated from his twin, when he died in battle. So Zeus gave Castor immortality uniting them in Olympos.

Gemini
Chart created with Stellarium 0.18.2

Most notable stars and deep-sky objects


Castoreyetelescope

Castor is actually a multiple star system consisting of six members but only two of its stars are visible through telescope.

M35 (Shoe-Buckle Cluster) binocular

M35 is a relatively close open cluster at a distance of 2.970 light years from Earth. It is already a spectacular sight observed through binoculars or a smaller telescope. Its neighbour, the smaller and fainter NGC 2158 is also an open cluster.

NGC 2420 (Twinkling Comet Cluster) binoculartelescope

NGC 2420 is an open cluster with the apparent magnitude of 8.3. It can be observed with binoculars or smaller telescopes.


Legend:

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Visible with the naked eye
binocular
Visible with binoculars
telescope
Visible with telescope
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Popular target for astrophotography