The Sun-Earth system can be approximated by a single inertial frame due to their low relative motion. They are an average of 8.2 light- minutes apart. Two events, A and B, occur at ta 0 mins on the Sun and to = 4 mins on the Earth respectively. Find the time difference between these events according to an ob- server moving at u = 0.6c along the straight line connecting the Sun and Earth. What is the time difference between these events in the scenario that the observer is moving in the opposite direction at the same speed. Describe the difference in the causal sequence of these events in the two scenarios.