Abstract
A fibre-optic time-of-flight instrument based on a modified Fizeau apparatushas been developed to measure the speed of light emanating fromastronomical objects. The instrument is optimized for low photon fluxsources. Lightspeed measurements from 11 nearby stars are reported,with a mean value of (2.98 ± 0.03) × 108 m s−1.These are the first direct photon velocity measurements for sources outside thesolar system.
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