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Message * Articles On Type-o Stars, including Delta Orionis, Krzeminski's Star, V838 Monocerotis, Sigma Scorpii, Upsilon Sagittarii, Ae Aurigae, Sigma Orionis, Theta¹ Orionis C, Mu Columbae, O-type Main Sequence Star, Afgl 2591, Lh54-425, Hd 35619 - 1244741043 - 9781244741041