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Message * Articles On F-type Supergiants, including Polaris, Alpha Persei, Canopus, Delta Canis Majoris, Iota Carinae, Alpha Leporis, Gamma Cygni, Zeta Geminorum, Delta Cephei, Eta Aquilae, W Sagittarii, Iota1 Scorpii, Nu Aquilae, Rt Aurigae - 1243251220 - 9781243251220