In the book i mentioned,the theory of our universes age is put in perspective.
We live in galaxy,a cluster of stars.
Our galaxy belongs to a cluster of galaxies.
That cluster,belongs to an even larger cluster,a supercluster!
There are many of these.
Gravity forms these clusters,the theory that the rate of the expanding universe is increasing,has been created to explain how these superclusters formed.
The galaxies are moving at a constant rate,at that rate, it would take hundreds of billions of years, for the superclusters to form.
There goes the big bang theory,out the window.
So they brought back Einsteins cosmological constant theory,revised.
They call it dark energy,there is zero proof that it exists.
It is simply a theoretical construct, to keep alive an impossible theory.
Einstein called this "dark energy",theory,the biggest blunder of his career,after later discoveries made it untennable.