Stellar Spectra and That Famous Mnemonic
Sooner or later, every amateur astronomer gets to know about the spectral classes of stars and that the letters which represent the spectral classes; OBAFGKM, can be remembered with that famous mnemonic; ‘Oh Be A Fine Girl Kiss Me’. In fact every self-respecting astronomer should ask the question; ‘Why such an odd jumble of letters?Why not ABCD etc.?’ I myself can’t remember asking such questions—well it was a long time ago!
KeywordsAbsorption Line Spectral Sequence Spectral Class Cool Star Balmer Line
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