Chapter 33.5, Problem 33.3GI

A comet plunges into the planet Jupiter. At the instant this happens, your physics class on Earth begins; in other words, the comet collision is simultaneous with your class beginning. A friend traveling from Earth toward Jupiter in a high-speed spaceship would say that (a) the comet collision occurs before your class begins; (b) the comet collision occurs after your class begins; (c) the comet collision and the beginning of your class are simultaneous.