Big bang - Planck probe gets clearest glimpse yet of cosmic dawn.

[Rath]

dtewi said:

Khuutra said:

I don't claim to under relativity - but no. There is no space except where there is the universe. The universe expands space, rather than expanding into it.

I think.

???

Then how could there be extra universes if there is no space outside of the universe?

When the universe was the size of a dot, there was nothing outside that little dot?

Well assuming there are other universes I would suppose that they each have their own self contained space as well.

But yes, to the best of our knowledge there was nothing outside of that little dot. And by nothing I mean no dimensions.