An astronaut takes what he measures to be a 10-min nap in a space station orbiting earth at 8000 m/s. a signal is sent from the station to earth at the instant he falls asleep, and a second signal is sent to earth the instant he wakes. part a does an observer on earth measure the astronaut's nap as being shorter than, longer than, or equal to 10 min? does an observer on earth measure the astronaut's nap as being shorter than, longer than, or equal to 10 ? a. equal b. shorter c. longer