This slit scan was made from latticework the Lovell Telescope at Jodrell Bank going through a considerable azimuthal and elevational rotation. The background sound is from both the Crab Pulsar and the binary pulsar PSR J0737-3039A, which was being studied by the telescope to measure Einstein's relativity to a great degree of precision - hopefully to the point where the theory of general relativity breaks down and makes way for a new theory. Then everyone can collect their Nobel Prizes.
The pauses in the sound are the pulsars eclipsing eachother.

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