sorry to bring this up again, i have just started special relativity and the constancy of c is a bit confusing, i get how c is the same in all inertial frames but what about accelerating frames? do observers in acceleration still see c as a constant? i have seen many forum posts and they always have two people saying the opposite things, can somebody set me straight on this? also, if the observer is moving at 0.99c and he will see c still being c, but what about a stationary observer looking at both? will he see both of them travelling almost at the same speed?