Static Universe
When the scientific community adopted the redshift of cosmic background radiation as a definitive tool, Einstein was convinced and gave up his cosmological constant: the universe could not be static. Either it would be expanding or contracting. I think Einstein did not realize that the photoelectric effect, which earned him the Nobel Prize, was going in the opposite direction to redshifting, since it attested that the waves would be discontinuous. Einstein also did not take into account that his claim that light would use its particle aspect to move in a vacum, attested that light from a distant star could not do so in the form of a wave. Good reading! Hope you like it.
J.R. Silva Bittencourt
Cosmology; Universe.