View Single Post
Jun11-05, 02:06 AM
P: 195
The universe is expanding & the universe is infinite

Place two particles at a finite distance away from each other, which impose no forces on each other. As time progresses, the expansion of the universe accelerates these two particles in opposite directions, causing them to move apart. In an infinite universe, the size of the universe won't grow due to expansion, but the distances between bodies, which are not being held together by a force stronger than the universe's expansion, tend to grow.