An astronaut travels to a star system 4.5 ly away at a speed of 0.90c. Assume that the time needed to accelerate and decelerate is negligible.a. How long does the journey take according to Mission Control on earth?b. How long does the journey take according to the astronaut?c. How much time elapses between the launch and the arrival of the first radio message from the astronaut saying that she has arrived?

An astronaut travels to a star system 4.5 ly away at a speed of 0.90c. Assume that the time needed to accelerate and decelerate is negligible.a. How long does the journey take according to Mission Control on earth?b. How long does the journey take according to the astronaut?c. How much time elapses between the launch and the arrival of the first radio message from the astronaut saying that she has arrived?

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2. Please help me answer these questions, well explained. A spacecraft travelling at a speed of 0.95 c goes from the planet Jupiter to the planet Pluto. A. If an observer on planet Jupiter measures the length of the vessel as 55 m, how long is it when it is stationary? B. A monkey inside the ship has a pulse of 116 beats/min when he is on the earth. What is his pulse inside the ship?
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2. Please help me answer these questions, well explained. A spacecraft travelling at a speed of 0.95 c goesfrom the planet Jupiter to the planet Pluto. A. If an observer on planet Jupiter mesures thelength of the vessel as 55 m, how long is it when it is stationary? B. A monkey inside the ship has a pulse of 116beats/min when he is on the earth. What is his pulse inside the ship?
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