Oh my god. My astronomy book has the saddest digression ever.
"They are named for delta Cephei, an example of this type of star discovered in 1784 by John Goodricke, a deaf, mute, 19-year-old English amateur astronomer. He found that at its most brilliant, delta Cephei is 2.3 times as bright as at its dimmest. The cycle of brightness
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