Fascinating article today on the S8 tension and its direct cousin the Hubble constant. #

In simple terms, the Hubble constant tells us how fast the universe is expanding at the present moment. It provides a way to estimate the age of the universe, as well as the distance to objects in space, based on their observed redshift (the change in the wavelength of light due to the expansion of the universe).#

The tension arises because these two independent methods produce slightly different values for the Hubble constant, despite the precision of the measurements. The difference is small but significant in the context of cosmology, and it suggests that there may be some unknown or unaccounted-for physics at play.#

The two most used ways to measure hubble constant is either using redshift in light to calculate distance or use the observable cosmic microwave background.#

I did not realize there is a similar calculations that shows discrepancy based on calculating the dispersement of matter both real and dark throughout the universe.#