28 Nov '14, 1pm

#OnThisDay in tech history, the first pulsar, or pulsating star, was observed by two radio astronomers.

#OnThisDay in tech history, the first pulsar, or pulsating star, was observed by two radio astronomers.

The first pulsar (pulsating star, a highly magnetized, rotating neutron star that emits a beam of radiation) was observed on November 28, 1967, by graduate student Jocelyn Bell Burnell and professor Antony Hewish at the Mullard Radio Astronomy Observatory in Cambridge, England. The two radio astronomers noted that the observed emission from the pulsar was pulses separated by 1.33 seconds, originated from the same location on the sky, and kept to sidereal time. In looking for explanation of their observation, they ruled out most astrophysical sources of radiation, like stars, because of their short periods of pulsing. Because the pulses followed sidereal time, the cause could not be man-made radio frequency interference. Instrumental effects were also ruled out when they double checked the observation through a different telescope. In a 1977 issue of Cosmic Search Magazine,...

Full article: http://www.edn.com/electronics-blogs/edn-moments/4402048/...

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