Castor (star) in their spectra, and all are flare stars. "α Geminorum" (Latinised to "Alpha Geminorum") is the star system's Bayer designation. Castor and Pollux are the two "heavenly twin" stars that give the constellation Gemini (meaning "twins" in Latin) its name. The name "Castor" refers specifically to Castor, one of the twin sons of Zeus and Leda in Greek and Roman mythology. The star was annotated by the Arabic description "Al-Ras al-Taum al-Muqadim", which translates as "the head of the foremost twin." In the catalogue of stars in the "Calendarium of Al Achsasi Al Mouakket", this star was designated "Aoul al
HMS Leda (1892) HMS Leda (1892) HMS "Leda" was a of the British Royal Navy. She was built by Sheerness Dockyard from 1891–1893. She was converted to a minesweeper in 1908–1909 and continued these duties during the First World War. "Leda" was scrapped in 1922. "Leda" was one of 11 "Alarm"-class torpedo gunboats ordered for the Royal Navy under the 1889 Naval Defence Act, which authorised the shipbuilding programme for the next five years, and also included the last two torpedo-gunboats of the and the five torpedo-gunboats of the . The "Alarm"s were slightly modified versions of the previous "Sharpshooter"-class, with modified engines