Suppose an astronaut is moving relative to the Earth at a significant fraction of the speed of light.

(a) Does he observe the rate of his clocks to have slowed? 

(b) What change in the rate of Earth-bound clocks does he see?

(c) Does his ship seem to him to shorten? 

(d) What about the distance between stars that lie on lines parallel to his motion? 

(e) Do he and an Earth-bound observer agree on his velocity relative to the Earth?