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Gemini is dominated by Castor and Pollux, two bright stars that appear relatively very closely together forming an o shape, encouraging the mythological link between the constellation and twinship. The twin above and to the right (as seen from the Northern Hemisphere) is Castor, whose brightest star is α Gem; it is a second-magnitude star and ...
Rho Geminorum (ρ Gem) is a star system that lies 59 light-years away in the constellation of Gemini, about 5 degrees west of Castor.The system consists of a primary bright enough to be seen with the naked eye, a faint secondary which has rarely been observed even professionally, and a distant, somewhat bright tertiary which requires telescopic equipment for observation.
Pollux is the brightest star in the constellation of Gemini. It has the Bayer designation β Geminorum, which is Latinised to Beta Geminorum and abbreviated Beta Gem or β Gem. This is an orange-hued, evolved red giant located at a distance of 34 light-years, making it the closest red giant (and giant star) to the Sun.
Epsilon Geminorum or ε Geminorum, formally named Mebsuta / m ɛ b ˈ s uː t ə /, [11] [12] is a star in the constellation of Gemini, on the outstretched right 'leg' of the twin Castor. The apparent visual magnitude of +3.06 [2] makes it one of the brighter stars in this constellation.
Zeta Geminorum (ζ Geminorum, abbreviated Zeta Gem, ζ Gem) is a bright star with cluster components, distant optical components and a likely spectroscopic partner in the zodiac constellation of Gemini — in its south, on the left 'leg' of the twin Pollux. It is a classical Cepheid variable star, of which over 800 have been found in our galaxy.
Tau Geminorum, Latinized from τ Geminorum, is a star in the northern zodiac constellation of Gemini.It has the apparent visual magnitude of +4.42, [2] making it visible to the naked eye under suitably good seeing conditions.
1 Geminorum (1 Gem) is a star in the constellation Gemini.Its apparent magnitude is 4.15.. In the 19th century, John Flamsteed numbered the brighter stars, by constellation, from west to east, and 1 Geminorum was the first star listed in Gemini.
Sigma Geminorum (σ Gem) is a binary star [9] system in the constellation Gemini, just to the northwest of Pollux. It is visible to the naked eye with an apparent visual magnitude of 4.20. [2] Its annual parallax shift of 26.08 mas [1] indicates that it is located 125 light years from the Sun.