An astronaut travels to a star system 4.5 ly away at a speed of
0.90 c. Assume that the time needed to accelerate and
decelerate is negligible. The astronaut sends a ratio message back
towards Earth as soon as she arrives in the star system. How much
time elapses between the launch from earth and the arrival of the
radio message?
An astronaut travels to a star system 4.5 ly away at a speed of 0.90 c. Assume that the time needed to accelerate and d
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An astronaut travels to a star system 4.5 ly away at a speed of 0.90 c. Assume that the time needed to accelerate and d
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