- #1
weinie
- 1
- 0
If space is expanding and I put a ruler inside this expanding space, the ruler should expand with the space. Therefore, inside this expanding space two particles would always measure, to an observer with the ruler inside the same space, the same distance away, even as that space expands since the ruler is expanding as well. So how would those particles ever "rip" apart in accordance with the Big Rip theory?