How long would it take to travel 4 light years
Asked by wiki @ in Physics viewed by 748 People
The nearest star to Earth is Proxima Centauri, 4.3 light-years away.
(a) At what constant velocity must a spacecraft travel from Earth if it is to reach the star in 5.0 years, as measured by travelers on the spacecraft?
(b) How long does the trip take according to Earth observers?