CP 1919

The first radio pulsar, CP 1919, with a pulse period of 1.337 seconds and a pulse width of 0.04 second, was discovered by Jocelyn Bell in the constellation of Vulpecula, just south of Cygnus. in July 1967. Before the nature of the signal was determined, the observation was given the half-humorous designation Little green men 1.

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The present day designation of this pulsar is PSR 1919+21: pulsar at right ascension 19 hours 19 minutes, declination 21 degrees.

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The British post-punk band Joy Division used an image of CP 1919's radio pulses on the cover of their debut album, Unknown Pleasures. http://members.aol.com/lwtua/up.htm

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Pulsar: Pulsars are rotating neutron stars that are observable as sources of electromagnetic radiation. The radiation intensity varies at a regular period, believed to result from the rotation of the star....

Jocelyn Bell: REDIRECT Jocelyn_Bell_Burnell...

Vulpecula: Vulpecula, being Latin for Fox, is a faint northern constellation located in the middle of the Summer Triangle, an asterism consisting of the bright stars Deneb, Vega and Altair....