A star is 14.7 ly (light-years) from Earth. (a) At what constant speed (in m/s) must...
A star is 14.7 ly (light-years) from Earth.
(a)
At what constant speed (in m/s) must a spacecraft travel on its journey to the star so that the Earth–star distance measured by an astronaut onboard the spacecraft is 4.46 ly?
m/s
(b)
What is the journey's travel time in years as measured by a person on Earth?
yr
(c)What is the journey's travel time in years as measured by the astronaut?
yr
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