3 ms·
I'm missing something here and would so happy if someone explained to me. I am sorry if I'm making false assumptions as my knowledge on the subject is very limi
by gusmd 11y ago
I'm missing something here and would so happy if someone explained to me. I am sorry if I'm making false assumptions as my knowledge on the subject is very limited.
If the universe started from a single point in space and time (i.e., Big Bang), and no matter moves faster than the speed of light, how could ANY star be more distant from us than light could have traveled in the same time frame?
(I'm assuming no matter is travelling at v > c/2, otherwise my argument would only be valid for things traveling in the same hemisphere of the expansion as Earth)
- Practicality 11y agoThe matter isn't moving. Space is expanding, ie, space is being inserted in-between all bits of matter. Edit: To elaborate further: Since all the newly expanded space also expands, the distance to travel continuously increases as the light travels, to the point where over a certain distance the light never completes the journey. So, the net effect is that the two objects become further apart faster than c, even though neither of them are moving.
- hoorayimhelping 11y agoSpace itself might be able to expand faster than the speed of light.
- Lawtonfogle 11y agoExpansion of space allows for the distance of two objects to increase such that it appears that one is moving away from the other at a speed greater than c/2. I think it is possible for this to even be greater than c because it is the expansion of space and not objects movement contributing to the increase in distance.
- joe5150 11y agoThis is an important concept to understand: https://en.wikipedia.org/wiki/Comoving_distance https://en.wikipedia.org/wiki/Comoving_distance