Alpha centauri a star close to our solar system is about 43, Ask an Expert

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Alpha Centauri, a star close to our solar system, is about 4.3 light years away. Suppose a spaceship traveled this distance at a constant speed of .90c relative to Earth.

How long did the trip take for the Earth based clock? Travelers clock?

What is the trip distance according to earth based observer?

What is the trip distance according to the traveler?

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