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  • Castor (star) - Wikipedia, the free encyclopedia

    Castor (α Gem / α Geminorum / Alpha Geminorum) is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky.

  • Castor (Alpha Geminorum)

    The second brightest star in the constellation Gemini and, in mythology, the twin of Pollux. Though appearing as a single white star to the naked eye, Castor is really a remarkable ...

  • Castor 6

    XMM-Newton, ESA, NASA Larger and jumbo x-ray images . Castor is a sextuple star system made of three binaries, bright visual stars Castor Aab and

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