Fixed Star Castor
The Sun joins Castor on July 12. Fixed star Castor, Alpha Geminorum, is a complex multiple-star system located in the head of the Northern Twin of Gemini Constellationbined magnitude 1.58, spectral type A1. Castor is designated α, but it is actually fainter than β Geminorum ().). Although Castor appears to the naked eye as a single star, it is …
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