In 1946, American physicist Gamow formally proposed the Big Bang theory, believing that the universe was formed by a big explosion that occurred about 14 billion years ago. At the end of the last century, observations of Type Ia supernovae showed that the expansion of the universe is accelerating because the universe may be mostly composed of dark energy.

George Gamow (1904-1968), born in Russia, was an American nuclear physicist and cosmologist. After graduating from Leningrad University, he went to teach in several universities in Europe. He immigrated to the United States in 1934 and is famous for advocating the theory that the universe originated from the "Big Bang".

Extended information

At the beginning of the explosion, matter could only exist in the form of basic particles such as neutrons, protons, electrons, photons and neutrinos. The continuous expansion after the explosion of the universe caused the temperature and density to drop rapidly.

As the temperature decreases and cools, atoms, nuclei, and molecules are gradually formed and compounded into ordinary gases. The gas gradually condensed into nebulae, which further formed various stars and galaxies, eventually forming the universe we see today.

The idea that "the universe does not exist forever, but was created from nothing" can be said to be deeply ingrained in Western culture. Although Greek philosophers once considered the possibility of an eternal universe, all major Western religions have maintained that the universe was created by God at a specific moment in the past.

Baidu Encyclopedia-Big Bang Theory