The big bang model is a accepted theory for the origin and evolution ofthe universe. It's says that around 10 to 14 billion years ago happened a masive explosion that throwed everything in all directions, this cosmic explosion created the Universe. Billions years ago the portion of the universe were we live was only few millimetres across. The hot mass and energy come together to form galaxies, stars and planets. Since the Big Bang galaxies are continuously expanding. All the galaxies are speeding away from the area were big bang occured.
The big bang theory is one of the most sound, well-tested and verified scientific models of all the time
