I've finished the book which writes about dark energy.

This is the 450th entry in this blog. That is half of 900 entries which is probably a significant number somewhere. I've finished the book which writes about dark energy, It never ceases to amaze me that we live in a universe of which we are totally unaware of the mass around us. I can accept the possible existence of WIMPs but and less sure of what causes dark energy. It turns out that the dark energy is associated with the Hubble constant (which may or may to be constant). Einstein included the Hubble constant to tweak his mathematics to achieve a flat universe. It turns out that tweaking the Hubble constant may result in a universe which is concave, convex or flat. Einstein regarded this as his greatest blunder. I should make such a blunder.
Dark matter and dark energy are indicators that we're all on this flight together.

Dick