Castor (also known as Alpha Geminorum) is a star system, a multiple star in Federation space in the Beta Quadrant. Castor's multiple system consists of six stars, including Castor B, which is orbited by Castus. The Castor system is visible from Earth in the Sol system, 49 light-years distant, as part of Human history's Gemini constellation. (TOS video game: 25th Anniversary; ST reference: Star Charts)
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- In TNG video game: Birth of the Federation, the orbital configuration of the game map star systems was randomly generated each time a new game started.
|Stars, systems and objects of the Gemini constellation|
|37 Geminorum (Kantare) • Alpha Geminorum (Castor) • Beta Geminorum (Pollux) • Delta Geminorum (Goren) • Epsilon Geminorum • Gamma Geminorum (Alhena) • Iota Geminorum (Tribble system) • Kappa Geminorum • Lambda Geminorum • Rho Geminorum (Preenos) • Sigma Geminorum • Xi Geminorum (Alzirr) • Zeta Geminorum (Maximilian)|