My question has to do with gravitational time dilation.
What would really happen to a human in a temporal frame where time slowed down (as it did on the water planet in Interstellar, where 1 hour on the water planet = 7 earth years), and what would an observer outside of that dilated reference frame actually observe if he could see into it or measure something in it (i.e., if Romilly had a powerful telescope and could look down from the Endeavor and see Cooper and Brand, or if he could monitor their heartbeats from orbit)?
(1) Would he see Brand and Cooper moving in slow motion … incredibly slow motion … so, for example, if Cooper moves his arm, let's say, 12 inches, in a matter of a milliseconds in his frame, would Romilly see that event play out over a very long period of time (i.e. days or weeks) in his frame?
(2) In Cooper/Brand’s time frame, their hearts are beating at 60 beats per minute … but if Romilly were able to monitor their heartbeats from his frame, would it appear to him that their hearts were beating once every 17 hours … and if so, how could they possibly survive? I am perplexed!