The universe is expanding, at a rate which I believe is heading past the speed of light.
This limits our ability to reach galaxies further away from us as they are speeding away faster than we could conceivably travel since our engines would of course be bound by the speed of light.
This limits our ability to reach galaxies further away from us as they are speeding away faster than we could conceivably travel since our engines would of course be bound by the speed of light.
Some more info: https://www.forbes.com/sites/startswithabang/2016/06/10/can-...