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About 3 times a second,a 10,000-yr-old stellar corpse sweeps a beam of gamma-rays toward Earth.This object,known as a pulsar,is the first one known to "blink" only in gamma rays,& was discovered by the Large Area Telescope (LAT)....
The gamma-ray-only pulsar lies within a supernova remnant known as CTA 1,which is located about 4,600 light-yrs away in the constellation Cepheus.Its lighthouse-like beam sweeps Earth's way every 316.86.milliseconds and emits 1,000 times the energy of our sun.