[填空题]
A certain star is 10.6 light-yearywzv kfc +mje3 p:,2q ;ia*y9is away. How long mg q:v)0l(s)knc i5de would it take a spacecraft traveling 0.960c to reach that star from Earth, as measured by observers:
s (ic)5 k):0qgenlv dm (a) on Earth, $t_{earth}$ = yr
(b) on the spacecraft? $\bigtriangleup t_0$ = yr
(c) What is the distance traveled according to observers on the spacecraft? L = ly
(d) What will the spacecraft occupants compute their speed to be from the results of (b) and (c)? v = c
