According to ‘FLRW metric’ expansion of space is taking place all the time everywhere. If 1 mm distance is becoming 2 mm in 1 billion years then 2 mm is becoming 4 mm in same 1 billion year and so on. Every length of space has to become double in same 1 billion years.
Image credit: NASA
So it is like Big Bang of creation of empty space taking place right now – everywhere. Nothing solid is being created by this everyday-everywhere happening Big Bang. However solid things are getting distant apart due to this all the time everywhere happening Big Bang.
And we are told that this is science. Failure to rightly explain cosmological redshifts has resulted in this non-sense Physics. This is really possible only in balloon surface like expansion where every point of surface keeps on expanding. But balloon is expanded due to continuous application of pumping action or force whereas in Big Bang Model, it is said that only the original one time pumping action is still doing its work. It cannot be argued that current expansion is the inertial motion generated by original one time Big Bang because it is not one time thing. This ‘Big Bang’ is taking place all the time – even now.
This type of Big Bang is all the time creating only ‘new empty space’. We should conclude that matter was never created by Big Bang. Matter existed already. Big Bang could only create ‘space’ and even now doing only the same. Given that Universe existed prior to Big Bang, the Big Bang only started ‘expansion’. Before start of Big Bang, it was a static universe. After stoppage of ongoing Big Bang, universe shall be again static.
For the further in-depth analysis, please see: A Philosophical Rejection of The Big Bang Theory