I'm trying to find a short story. I don't remember many of the specifics, but there is a boy that is exploring space and he doesn't heed the warning about flying too close to some object (maybe the sun or a black hole). After exploring the object he returns to find all his family and friends are old because he forgot about space time and time slowing down for him due to exposure to gravity.
Unfortunately, I hardly remember many details. I believe I heard a bit on the radio about the short story so I haven't even read it. I really don't know, but would guess on NPR around 2010 or so. I can't recall names or the writer. I believe it was a boy who didn't follow the advice of his father.