Ron, Distance is irrelevant. When we say one of Jupiter’s moons will vanish behind that planet ten minutes from now, it doesn’t matter that it already happened almost an hour ago. By convention, we express time as when the event’s image reaches us!.
Ron, Distance is irrelevant. When we say one of Jupiter’s moons will vanish behind that planet ten minutes from now, it doesn’t matter that it already happened almost an hour ago. By convention, we express time as when the event’s image reaches us!.