Big Bang

Big bang

The Big Bang symbolizes the instant the universe began, when time and space came into existence and all matter in the cosmos launched into expansion. Prior to this all fourfundamental forces (gravity, electromagnetism and the strong and weak nuclear forces) were combined. The explosion was one of space within itself. It was not like the explosion of a bomb where fragmentsare thrown outward . The galaxies were not clumped together. During the first second or so of the universe large amounts of energy, known as photons, smashed together and changed their energy into mass.This caused the four forces to split into their separate identities. As the universe continued to cool, protons and neutrons combined to form helium and other light nuclei. It was not until aroundone million years after the Big Bang, nuclei and electrons were cool enough to unite to form atoms. The universe did not start to look as it does today until small deviations in the matter distributionwere able to squeeze to form the stars and galaxies as they are known today. The Big Bang Theory does a remarkable job of describing the universe, as it is known today. It explains the development ofthe universe, predicting the correct profusion of hydrogen and helium (the most common elements in the universe) and it accounts for the cosmic background radiation.

Though it was very successfuland few scientists doubt its validity, the Big Bang Theory was too simple to be complete. Despite the name “Big Bang,” the big bang premise is not really a theory of a bang at all. It describes theaftermath of the bang. The theory expresses how the early, hot dense universe expanded and cooled. Light chemical elements were synthesized during the expansion and matter clotted to form galaxies andstars. Yet, there is further evidence for the Big Bang. In 1964, two astronomers, Arno Penzias and Robert Wilson, in an effort to detect microwaves from outer space, accidentally discovered a noise of...