Question: The proper distance between earth and Alpha Centauri is 4 light - years. A spaceship sets out to cross this distance with a uniform speed

The proper distance between earth and Alpha Centauri is 4 light-years. A spaceship sets out to cross this distance with a uniform speed of c/2 with respect to earth.
How long would the trip take, as measured by timepieces stationed on earth and Alpha Centauri? (1 point)
2. How long would the trip take, as measured by a timepiece stationed on the spaceship?

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