Initially, various kinds of subatomic particles are formed in stages. The earlier parts are beyond the grasp of practical experiments in particle physics but can be explored through the extrapolation of known physical laws to extreme high temperatures.

Different stages of the very early universe are understood to different extents. Tiny ripples in the universe at this stage are believed to be the basis of large-scale structures that formed much later. It includes the Planck epoch, during which currently established laws of physics may not have applied the emergence in stages of the four known fundamental interactions or forces-first gravitation, and later the electromagnetic, weak and strong interactions and the accelerated expansion of the universe due to cosmic inflation. The first picosecond (10 −12) of cosmic time. It is generally considered meaningless or unclear whether time existed before this chronology: Outline Chronology in five stages Diagram of evolution of the (observable part) of the universe from the Big Bang (left), the CMB-reference afterglow, to the presentįor the purposes of this summary, it is convenient to divide the chronology of the universe since it originated, into five parts.

Free Electron 25.3.2