yea, but my question is, why? If there is indeed no preferred reference frame, where does this asymmetric answer come from? If it's because he shot the missile, then let us consider the instant before the missile was shot. At that point you have a ship approaching a planet (and conversely, a...
Homework Statement
"A hostile spacecraft approaches your outpost on a distant planet at a speed of 0.3c. When it is at a distance of 3.0*10^{7} km you launch a missile at the enemy with a speed of 0.5c.
How much time will elapse before the missile hits the enemy spacecraft as seen in...