Seeing is not the same as observing!) Suppose at time t = 0 you (on earth) simultaneously receive a message (sent via a laser transmission) emitted (event A) by the outpost on Venus (which is 180 Gm away at the time) and a message emitted (event B) by the outpost on Mars (which is 270 Gm away at the time). Each message requires an urgent response that must be received no more than 40 minutes after it was sent. Which message do you respond to first? Explain.

Seeing is not the same as observing!) Suppose at time t = 0 you (on earth) simultaneously receive a message (sent via a laser transmission) emitted (event A) by the outpost on Venus (which is 180 Gm away at the time) and a message emitted (event B) by the outpost on Mars (which is 270 Gm away at the time). Each message requires an urgent response that must be received no more than 40 minutes after it was sent. Which message do you respond to first? Explain.