The Big Bang Theory threw matter within what we now call space. Allowing for it to expand and create more and more and as the Universe cooled, the material came together and formed galaxies, stars, and planets, ect...
Hi!Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
