|Image credit: NASA (click on the link to see a short animation of the presumed initial explosion and afterward).|
One of the alleged ‘proofs’ of the big bang model of origins is said to be the Cosmic Microwave Background (CMB). The radiation was discovered in 1964 by Penzias and Wilson for which they won the Nobel prize in physics. Soon after their discovery, it was claimed that this radiation is the ‘afterglow’ of the original ‘explosion’ or fireball of the big bang. Since the time at which the radiation, which started as heat, was emitted from the fireball, the universe has allegedly expanded by a factor of 1,100. Thus, that ‘afterglow’ radiation has ‘cooled down’ to much longer wavelengths (‘stretched’ from the infrared to the microwave portion of the spectrum). These are detected by microwave telescopes today.To finish reading, click on "‘Light from the big bang’ casts no shadows".
According to theory, the big bang fireball should be the most distant light source of all. Thus all galaxy clusters would be in the foreground of this source. Therefore all CMB radiation must pass the intervening galaxy clusters between the source and the observer, here on earth. This radiation passes through the intergalactic medium, between the galaxies in the clusters, and is scattered by electrons, through inverse Compton scattering, now known as the Sunyaev–Zel’dovich effect (SZE). When this happens, the path of the CMB radiation is interrupted and distorted.