How long will trip take according to a clock fixed on planet

Reference no: EM13499625

The distance from Planet X to a nearby star is 12 light-years (a light-year is the distance light travels in a year) measured in the rest frame of Planet X. The relative velocity between Planet X and the star is negligible.

(a) How fast must a spaceship travel from Planet X to the star in order to reach the star in 7years according to a clock fixed on the spaceship?

(b) How long will the trip take according to a clock fixed on Planet X?

Reference no: EM13499625

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