"Because Krikalev spent so much time in space away from Earth’s center of gravity, time dilation (or the slowing down of clocks) caused him to be 0.02 seconds younger than other people born at the same time as him."

Shouldn't it say older rather than younger ? Does this not happen to everyone in space, to varying degrees depending on how long they are up there ?

Is this really time travel ? I don't really think it is, more like a time shift.

Lastly, and perhaps most importantly, if I remember correctly my physics, the time shift is caused by the black hole (Gargantua), not the planet. So I have a feeling you are talking about oranges, apples and bananas at the same time.