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Technology Synchronizes Widely Spaced Devices by Jim Turley Physics teaches us that distance is time. Light travels at a finite speed, so looking at a faraway object is, in a sense, looking back in time. Even the nearest star to our own, Proxima Centauri, is 4.25 lightyears away, so the light we see now is 4 years and 3 months old. You can’t look at it now because “now” is relative. Sitting in the back row of an auditorium, you can hear an audio simulcast or livestream sooner than you’d hear the speaker in person, because radio waves travel so much faster than sound. Even allowing for conversion time and transmission time, the digital version will reach you quicker. Weird. ....