A Conversation for Spectral Classification System
What happened to the really cool ones?
Kes Started conversation Aug 1, 2000
What became of classes R , N and S ?
What happened to the really cool ones?
J'au-æmne Posted Aug 1, 2000
They didn't make it on to my astronomy course...
What happened to the really cool ones?
Astronomer Posted Nov 15, 2000
They do not belong to the main classification system.
They are complimentary, generally M stars with some peculiarities, like strong Nitrogen/Carbon/Sulphur lines, etc.
The mnemonic was "Oh, Be A Fine Girl, Kiss Me Right Now, Sweetheart" 
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What happened to the really cool ones?
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