Recent content by Jaime Rudas

The most widely accepted cosmological model today is based on General Relativity (GR) and the cosmological principle that assumes that, at very large scales, the universe is homogeneous and isotropic.

Yes, I understand now. The title is correct, and I, once again, am wrong.

Yes, I understand now. The title is correct, and I, once again, am wrong.

Yes, that's why I stated "only if the universe is finite."

Yes, its density can decrease, but this doesn't mean the (infinite) universe as a whole will become vaster

If the universe is infinite, can it become even vaster?

Only if the universe is finite

Regarding the D&L paper, I think there might be an error in footnote 11 on page 19. Shouldn't it be ##v_{rec}(t_{em}) =\dot R(t_{em})\chi(z)##?

I think it's more about how the scientific community perceives it. In other words, the question in the OP is whether or not the scientific community is more receptive to dark-energy alternatives than to MOND-like dark-matter alternatives. My point is that it is more receptive insofar as it...

Yes, what I wanted to emphasize is that the level of skepticism is more related to whether or not the model deviates from General Relativity than to whether the model is an alternative to dark matter or dark energy.

I think the issue has to do with the fact that General Relativity is one of the most successful theories in history, so any model that deviates from it is usually viewed with skepticism. Thus, for example, quintessence or k-essence are not seen as alternatives to dark energy, but rather as...

For example, if I have an elastic band that is one centimeter long and I stretch it for one hundredth of a second, its final length will depend on the speed at which its length expands. Does that mean that the speed of expansion of length has physical meaning?

I don't know how to determine whether something has physical meaning or not. For example, I can't understand why the speed at which an object moves can have physical meaning, while the speed at which an object's length expands cannot.

Once again: I made a mistake

Once again: I made a mistake when I said I was referring to the distance traveled by the photon.