https://www.princeton.edu/~pkrugman/interstellar.pdf
(12 pages, quick read)
It's really an interesting situation; thinking about how there would no longer be an 'unambiguous' measure of time when we have faster than light travel.
I try to separate academic Krugman from New York Times Krugman. It helps.
I don't. I have much respect for the man.
But his NYT writings can sometimes lean towards what might be described as "left-wing blowhardism".
It's really an interesting situation; thinking about how there would no longer be an 'unambiguous' measure of time when we have faster than light travel.