The formation of planets, Sir Harold Jeffrey supported this argument. At a later date, the arguments considered of a companion to the sun to have been coexisting. These arguments are called binary theories.
The most popular argument regarding the origin of the universe is the Big Bang Theory. Edwin Hubble, in 1920, provided evidence that the universe is expanding & became transparent.
The Big Bang Theory considers the following 3 stages in the development of the universe.
In the beginning, all matter forming the universe existed in one place in the form of a “tiny ball” (singular atom) with an unimaginably small volume, infinite temperature and infinite density.
At the Big Bang the “tiny ball” exploded violently. This led to a huge expansion. It is now generally accepted that the event of big bang took place 13.7 billion years before the present. The expansion continues even to the present day. As it grew, some energy was converted into matter. There was particularly rapid expansion within fractions of a second after the bang. Thereafter, the expansion has slowed down. Within first three minutes from the Big Bang event, the first atom began to form.
Within 300,000 years from the Big Bang, temperature dropped to 4,500 K (Kelvin) and gave rise to atomic matter.
Lithosphere consists mainly of mafic crust and ultramafic mantle (Peridotite)
The earth was mostly in a volatile state during its primordial stage. Due to gradual increase in density the temperature inside has increased.
As a result the material inside started getting separated depending on their densities. This allowed heavier materials (like iron) to sink towards the center of the earth and the lighter ones to move towards the surface. With passage of time it cooled further and solidified and condensed into a smaller size. This later led to the development of the outer surface in the form of a crust
During the formation of the moon, due to the giant impact, the earth was further heated up. It is through the process of differentiation that the earth forming material got separated into different layers.
The origin of life on Earth is a set of paradoxes.
Origin of life as a kind of chemical reaction, which first generated complex organic molecules and assembled them.
The microscopic structures closely related to the present form of blue algae have been found in geological formations much older than some 3,000 million years. It can be assumed that life began to evolve sometime 3,800 million years ago.