That’s a classification scheme created by Annie Jump Cannon in the early 1900s based on stellar spectra.

这是 Annie Jump Cannon 在 1900 年代初期根据恒星光谱创建的分类方案。

One Harvard computer, Annie Jump Cannon, used her repetitive acquaintance with the stars to devise a system of stellar classifications so practical that it is still in use today.

有一位名叫安妮·江普·坎农的哈佛大学计算员，利用她熟悉恒星的有利条件，发明了一种恒星分类系统。这种系统如此实用，直到今天还在使用。

It's a little weird, but many people use the mnemonic, “Oh Be A Fine Guy, Kiss Me, ” or “Oh Be A Fine Girl, Kiss Me, ” to remember it — which was dreamed up by Annie Jump Cannon herself!

这有点奇怪，但很多人会用“Oh Be A Fine Guy, Kiss Me”或“Oh Be A Fine Girl, Kiss Me”来记忆——这是安妮·加农自己想出来的！