In the twin paradox, if B moves away from A at constant high speed what would the minkwoski diagram look like in the frame of A and in the frame of B. well in the frame of A. if B starts next to A i.e. at O and is moving at close to c to begin with the world line of B will just be a straight line making an angle of just less than 45 degrees with the positive ct axis, yes? but how do i draw the return journey? and in the frame of B the diagram should end up as just a reflection of the above in the ct axis (and i also have to relabel my axes to x' and ct'), yes? cheers.