The origin of the planets, the history of the origin of the Earth- a topic that has always occupied the minds of people. Even in antiquity, there were ideas about the creation of the world. The first scientific hypotheses, based on astronomical observations, appeared in the 18th century. Today, scientists are armed with modern technology and deep knowledge of the chemical composition of the solar system.
What the Earth came from
According to modern ideas, SolarThe system arose from a nebula nebula - a cluster of dust and gas. This nebula consisted of fragments of stars of earlier generations, representing a cluster of microscopic particles of substances thrown into space. The forces of attraction pushed these particles together, resulting in the formation of large blocks. In the event that such a lump attracted enough gas to itself, a gas giant (like Jupiter) was formed, otherwise - a rocky planet, like our Earth.
More dense substances descended to the centerPlanets, and the lungs floated to the surface. The embryos of the planets captured the gas clouds, merged with each other. The process of formation of each planet passed uniquely, which explains the diversity of the planets.
Energy, which was formed by gluingParticles, and that which was released as a result of nuclear reactions, warmed up the depths of the planet. Thanks to this heat, the planet was created in a molten state.
From a stone block to an inhabited planet
To form the Earth it took 300-400Million years. The initial stage of the life of the Earth contains many mysteries. It was a time of intense volcanic activity, just then the core of the planet, the mantle and the earth's crust were formed. Also at this time, due to a collision of the Earth with the asteroid, the Moon was formed.
Gradually, the Earth cooled, its surfaceHas acquired a firm crust from which the first continents were created. The earth was constantly subjected to meteoric bombardments, comets with ice crashed into the planet. Thanks to this, the Earth received a huge amount of water from which the oceans formed. Strong volcanic activity and the release of water vapor created the first atmosphere, initially it was deprived of oxygen. The created continents moved along the molten mantle, approaching and moving away, sometimes forming a supercontinent.
Due to the chemical reactionsThe first organic molecules are formed. They formed increasingly complex structures, which eventually led to the appearance of molecules that can reproduce their copies. That's how life began on Earth.
Despite the fact that the Earth appeared more than fourBillions of years ago, its formation continues in our days: the bowels of the planet and its crust are in constant motion, changing the climate, the outlines of the continents and the relief.