Joy Division - Unknown Pleasures (1979)  The front cover image comes from an edition of the Cambridge Encyclopedia of Astronomy, and was originally drawn with black lines on a white background. It presents successive pulses from the first pulsar (a highly magnetized, rotating neutron star that emits a beam of electromagnetic radiation) discovered, PSR B1919+21—often referred to in the context of this album by its older name, CP 1919. The image was suggested by Bernard Sumner.
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