
The cover of Unknown Pleasures by Joy Division is actually a scientific diagram showing radio signals from CP 1919, the first pulsar ever discovered, originally created by astronomer Harold D. Craft Jr. for a 1970 PhD thesis.
Guitarist Bernard Sumner found the image in an astronomy encyclopedia and wanted to use it because of how cold, mysterious, and mechanical it looked, which matched the sound of the band. Designer Peter Saville later inverted the colors and removed all text from the cover, turning the data plot into one of the most recognizable album artworks ever made.




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