- #1
anonymous3
- 1
- 0
From what I understand, the expansion of the universe means that sub-lightspeed travel is sort of like running on a treadmill and eventually the expansion wins out and you'll never get anywhere.
So, my question is,
Take a point in the universe, and imagine a sphere expanding from that point at, say, 80% the speed of light, how much of the universe will that sphere envelop before the expansion of the universe gets the upper hand and the sphere gains nothing but vacuum space?
So, my question is,
Take a point in the universe, and imagine a sphere expanding from that point at, say, 80% the speed of light, how much of the universe will that sphere envelop before the expansion of the universe gets the upper hand and the sphere gains nothing but vacuum space?