It was discovered to be a visual binary in 1719 by James Bradley. That pair is part of a star system with another binary,* composed of two red dwarfs, which are located 72 arcseconds away, but share the same parallax and proper motion. Spectrographic analysis of the primary stars revealed that each 
It was discovered to be a visual binary in 1719 by James Bradley. That pair is part of a star system with another binary,* composed of two red dwarfs, which are located 72 arcseconds away, but share the same parallax and proper motion. Spectrographic analysis of the primary stars revealed that each is actually a binary, proving that this star system is actually composed of 6 different stars. FTP, what is this star, designated alpha Geminorum, though it is fainter than beta Geminorum, or Pollux?
It was discovered to be a visual binary in 1719 by James Bradley.
Castor (accept Alpha Geminorum before it is said)