Evolution of the universe — answers to FAQ

In the second half of the XX century, the understanding have finally formed that the universe had a beginning. The Hot Big Bang theory was commonly approved. With the development of science, the accumulated data of astronomical observations and experimentally verified theoretical principles have allowed physicists to look into the past of the universe and create a reliable picture of its evolution. The construction of this picture of the change of space and energy state of the universe was initiated by Alexander Friedmann who brought the dynamics to Einstein’s theory of gravity. Less than in ten years, based on the results of observations, the rate of expansion of the universe was calculated. Then there was a series of experimental and theoretical discoveries that allowed us to reconstruct the sequence of events in the early universe in detail and to explain its observed homogeneity and isotropy as well as the structure formation and the abundance of chemical elements. However, these discoveries have put serious questions in front of the physics of elementary particles.

Friedman formulated the equation of the universe

Friedman realized that not only matter but also space changes over time.