Because of the existence of dark energy, the farther away distant objects in the Universe are, the faster they move away from us, and they’ll continue to recede faster and faster as time moves on. While we might be able to see out into the future for 46 billion light years in all directions, most of those galaxies are already unreachable. If we left on a journey today, arbitrarily close to the speed of light, we’d only be able to catch up to about 3% of the galaxies within the observable Universe, with approximately 20,000 new stars crossing the threshold to become unreachable with each second that goes by.
Sorry, Donald Trump, it can’t be infinity
Ethan Siegel
17021

Fine example of the sort of fresh and original point that Ethan provides.

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