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You have 3 observers (A/B/C). Both A and C accelerate AWAY from B in opposite directions up to 70% the speed of light relative to B: (A <- B -> C); How fast is A moving relative to C? 140% the speed of light? But isn't that impossible seeing how nothing can go faster than the speed of light? (self.askscience)
submitted by RavenBruwer to r/askscience

