[填空题]
Suppose a news report stated thao-r(*f. 0n9qkkzwbes, f.w57oeiyta t starship Enterprise had just7ytfs9t6j d* 57s f0ddnbbt7o returned from a 5-year voyage while traveling at 0.84c. bfjsyt 7t67570dsfo b ddn 9t* (a) If the report meant 5.0 years of Earth time, how much time elapsed on the ship? $\Delta t_0$ = yr
(b) If the report meant 5.0 years of ship time, how much time passed on Earth? $\Delta t$ = yr
