Astronomers measure the distance to a particular star to be 6.0 light-years (1 ly = distance light travels in 1 year). A spaceship travels from Earth to the vicinity of this star at steady speed, arriving in 2.50 years as measured by clocks on the spaceship. (a) How long does the trip take as measured by clocks in Earth’s reference frame (assumed inertial)? (b) What distance does the spaceship travel as measured in its own reference frame?
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