Recent content by daveian

Thanks for responses on the size of a singularity which poses a further question on the size of the universe at time zero (Big Bang); infinitely small or not? I read that GR can not handle the calculations when the universe was youger than Planck time. One can still speculate however.

We are told that at the centre of a black hole lies a singularity; very small and very heavy. We here a lot about the mass but not the size (diameter) of this object,I asume this is not zero So, incredibly tiny though it may be , it would still bel greater than 0. Questions;- What then is the...

I am not an expert on cosmology, merely an interested layman, so I hope my question is not either too stupid or obvious. As I understand it from reading books (currently Brian Greene's "Fabric of the Cosmos"), general relativity (GR) is used for analysing large massive objects whereas quantum...