In the twin paradox the twin that returns from the journey is younger than the one that stays on earth.
I’m not a physicist, but in the twins paradox, the twin who goes on the journey travels at speed, and time slows down for her due to all that special relativity stuff (i.e. time dilation).
I think what that means is that if you are a photon (one of the photon’s encoding this stream of data) then time is at a standstill: the photon arrives at the end of its journey the same “age” as when it departed. So for the photon, the journey from (say) Voyager I is instantaneous.
That’s also why if you were to get a spaceship going fast enough to the nearest star, then for the people on board it would appear to take a lot less time than for observers on earth.
For observers on earth watching the photon, it will take distance/speed-of-light seconds to arrive though, so no use for budding time machine builders.
But I could be talking nonsense here.