Season 12 Episodes14
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Radio-astronomers at Jodrell Bank are carrying out a series of remarkable experiments to measure the distance from earth of 'pulsars'-the mysterious regularly-ticking radio sources out in space which were discovered last year by British scientists. Patrick Moore discusses the significance of these experiments with
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"The 'Clocks' of Space" is episode 12 of The Sky at Night season 12. It aired on November 4, 1968.