A spaceship moves past Earth with a speed of 0.908 c. As it is passing, a person on Earth measures the spaceship's length to be 76.7 m. (a) Determine the spaceship's proper length (in m). m (b) Determine the time (in s) required for the spaceship to pass a point on Earth as measured by a person on Earth. s (c) Determine the time (in s) required for the spaceship to pass a point on Earth as measured by an astronaut onboard the spaceship. s