How Big Is Space?

[oats]

Originally Posted by Diode

current theories make it a presence of a thing: dark matter.

and it has mass!

dark matter and anti-matter are interesting theories, no doubt, and I'm honestly not in any position to discuss them (my "background" insofar as science is concerned is in mechanical physics, which, as we learn more and more, seems to be less and less applicable to astrophysics). I was more referring to the original question (how big is space) as well as the imaginative voyages of multiple dimensions etc. not against any of that discussion tbc, just pointing out a common, fundamental error with that thinking (if space is infinite therefore possibilities are infinite, since there could be all these planets etc etc).