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  • Thumbnail for Blue supergiant
    believed to be in a blue loop Nu Cephei, A-type supergiant, spectral type A2Ia Alpha Camelopardalis, O-type supergiant, specteal type O9Ia Sigma Cygni,...
    21 KB (2,494 words) - 01:56, 22 September 2024
  • Thumbnail for Stellar classification
    Ursae Majoris A0Va – Vega A0Ib – Eta Leonis A0Ia – HD 21389 A1V – Sirius A A2Ia – Deneb A3Va – Fomalhaut F-type stars have strengthening spectral lines H...
    104 KB (11,337 words) - 03:03, 25 September 2024