A certain star is 9.80 light-years away.
How long would it take a spacecraft traveling 0.95c to reach that star from Earth, as measured by observers on Earth?
How long would it take a spacecraft traveling 0.95c to reach that star from Earth, as measured by observers on the spacecraft?
What is the distance traveled according to observers on the spacecraft?
What will the spacecraft occupants compute their speed to be from the results of parts B and C?