If I've understood this, at least to some extent, everything always travells at the speed of light (or c to be more precise), provided you take account of the speed of travel through time as well as space, something at a fixed point in space travels through time at c and something travelling through space at c ceases to travel through time? The earth, sun etc. are not fixed points in space, they move through space as does our galaxy as well.  My question is really where this puts us on a scale from a fixed point in space too something travelling through space at c, and how much of an effect do we experience (I realise we would be unaware of it), compared to something not moving through space at all.  If I were to look out into deep space and by some weird coalescence of improbabilities were to see a person standing at a fixed point, unmoving in space, how much faster would they appear to age (travel through time) from my perspective (still traveling at normal earth speeds) or would this be the case at all? Many thanks,