The cosmic explosion that marked the beginning of the universe according to the big bang theory — compare BIG CRUNCH.
In astronomy, the hypothetical “explosive” event that marked the origin of the universe as we know it. At the time of the Big Bang, the entire universe was squeezed into a hot, superdense state. The Big Bang explosion threw this compact material outward, producing the expanding universe (see red shift). The cause of the Big Bang is unknown; observations of the current rate of expansion of the universe suggest that it took place about 10–20 billion years ago. The Big Bang theory began modern cosmology.
According to a modified version of the Big Bang, called the inflationary theory, the universe underwent a rapid period of expansion shortly after the Big Bang, which accounts for its current large size and uniform nature. The inflationary theory is supported by the most recent observations of the cosmic background radiation.
Scientists have calculated that one 10-36 second (equivalent to one million-million-million-million-million-millionth of a second) after the Big Bang, the universe was the size of a pea, and the temperature was 10 billion million million millionşC (18 billion million million millionşF). One second after the Big Bang, the temperature was about 10 billionşC (18 billionşF).
Teorija o nastanku vasione velikom eksplozijom.