What is the shape of an "isodistance" volume from the point of view of an observer traveling at relativistic speeds? (EDIT: ... compared to that of an outside observer) If it is not spherical, how do the distorted (?) distances of all mass objects surrounding the observer affect the observer's path through spacetime? Is there more gravity parallel to the direction of travel? If a rocket points at a massive destination object, will that object tend to align the relativistic rocket in that direction as velocity increases? Thanks!