What scientists know about the formation of the Solar system and in particular our planet? It is believed that the Solar system were formed by gravitational contraction of the dust cloud about 4.57 billion years ago, and on the formation of the Earth took 10-20 billion years. However, researchers from the center for the education of stars and planets StarPlan, came to the conclusion that the Earth was formed only five million years — and it is extremely fast in astronomical scale. The obtained results violate conventional theory that our planet was the result of accidental collisions between larger planetary bodies within a few tens of millions of years. A study published in the journal Science Advances.
The study confirms a more recenttheory of planet formation through the accumulation of cosmic dust. Yes, in the twenty-first century, we are still unable to say with certainty how it formed planets. Scientists believe that a great many tiny dust particles stick together into a unified whole, gradually forming planet. Then, when the object increases in size, increases its gravitational force, then the proto-planet is beginning to attract other celestial objects and bodies. This, in turn, leads to conflict and an increase in the mass of the proto-planet. This is so as long as the celestial body finally becomes a planet.
The researchers believe that the fact that the Earth formed faster than previously thought, can tell a lot about what makes other worlds beyond our Solar system.
Isotopes of iron
As mentioned above, the researchers believed that our planet was formed tens of millions of years. But the isotopes of iron in the Earth’s mantle suggest the opposite. The fact that scientists have conducted the most precise measurements of iron isotopes to date and in the study of the isotopic mixture of the metal element in the different meteorites found only one type of meteoritic material with the earth’s composition — the so-called CI chondrites. Interestingly, the composition of the CI chondrites is similar to the composition of the Solar system as a whole. The researchers also calculated that the black core of the proto-Earth was formed approximately in the same period.
The fact that the composition of our planet, comparable only with the CI chondrites, suggests a different model of education Ground: tiny particles of space dust allowed the planet to form faster than by accumulation of larger species — that is, constant collisions with other celestial bodies. In just five million years formed the core of the planet, absorbing the early iron. When the Solar system cooled down after the first of the hundreds of thousands of years, particles of cosmic dust was able to migrate inside the system, where was formed the Earth.