who give big bang theory
Answers
Explanation:
Big Bang theory as developed by Friedmann, Lemaître, Robertson, and Walker.
Answer:
In 1927, Mgr Lemaître was the first scientist to explain what we call today the “Hubble law”, stating that the speeds of the far galaxies are proportional to their distances, in all directions of the universe. He explained that using a solution of Einstein’s equations of General Relativity corresponding to an expanding universe. In 1931, Lemaître introduced the “Primeval Atom” cosmology which can be considered as the prehistory of the Big Bang cosmology. In the latter, the universe begins by an initial singularity and its expansion is governed by gravitational attraction but also by a repulsion (described by the famous cosmological constant). This force is responsible for the fact that now the universe is accelerating. This is confirmed by more recent observation and the origin of this repulsion is now attributed to the “dark energy”. At that time, Lemaître was also one of the first who thought about fossil radiation. He believed that this radiation was made of cosmic rays. Since 1965 and the discovery of the Cosmological Microwave background (CMB) by Penzias and Wilson, we know that Lemaître was wrong. But, studying the properties of the trajectories of the cosmic rays detected at high altitude (the so-called Störmer Problem) he contributed to deep mathematical foundations for the theory of the Polar Aurorae.