Space Web

Cosmic background

Cosmic background: cosmic radiation is electromagnetic radiation that comes from the Universe from all directions, and it is the residue of the era of recombination that occurred in the evolution of the Universe 379,000 years after the big bang theory in accordance with the standard model of the universe. In this era of evolution of the universe has undergone further cooling to a temperature of about 3000 degrees Kelvin. Under these conditions proved existing nuclei of hydrogen and helium capture and retain the original free electrons. An recombination, that is, the formation of neutral hydrogen and helium. The material became transparent to radiation, and then the radiation decoupled from matter and further developed independently, with homogeneous and isotropic filled the space, further participate in the expansion of the Universe and its temperature gradually decreased to the current value of 2.7 Kelvin. Background radiation was discovered in 1965 by Arno Penzias and Robert Wilson in 1978 and they were awarded the Nobel pirze for physics, for this discovery. Background radiation presents in their characteristics correspond Black body radiator with a temperature of about 2.73 C and the greatest intensity at a wavelength of 2-3 mm. The discovery of cosmic background radiation was a strong evidence supporting the theory of the big bang.

Cosmic Background