Post Vintage (295): The world that could not be
Post Vintage (295): The world that could not be
Because it is Mars much smaller than The earth?
It represents one of those little enigmas that the formation of the Solar System hides, since if the density of the disc of material that surrounded the nascent Sun would have been more or less uniform, current models indicate that it should have grown as much as Venus or The earth. But the reality is completely opposite, and as we know, the red planet is barely half the diameter of our world and only 10% of its mass. That prevented him from growing as he should have done and actually become a second land is one of the questions that astronomers ask themselves when they study Mars and his story.
Currently there are 2 main theories that try to explain this anomalous situation. The main one points out that Jupiter and Saturn they migrated towards Sun, shortly after its formation, and then headed back towards the outer solar system, once again, sweeping the planetesimals, the primary blocks from which the planets would form, in their wake thanks to the gravitational chaos generated in the process."Provided that Jupiter changes direction to 1.5 AU, the growth of Mars atrophies, but leaving enough material closer to the sun to form Earth and Venus", explains John Chambers, of the Carnegie Institution for Science. The concept of the migration of gaseous giants currently has many supports among planetary scientists, so this would be one of its consequences.
An alternative explanation is the one recently proposed by a team of researchers led by Andre Izidoro, of the Universidade Estadual Paulista, Brazil. Their simulations of the gas flow during the early times of the Solar System suggest that a region of low density may have existed naturally in the protoplanetary disk between 1 and 3 AU Sun. "If this partial vacuum survived long enough, it could have been preserved in the distribution of planetesimals and planetary embryos that were subsequently formed", writes Chambers."The simulations carried out by Izidoro show that the reduction of the number of planetary construction blocks near the current orbit of Mars between 50 and 75 percent favors the formation of an insignificant red planet"
There remains a 3rd possibility, and that is, simply, a statistical accident: "Simulations of formation of conventional planets generate analogues of Mars in a small percentage of cases, without the need for any special measures. This leaves the small possibility that it simply represents a strange statistical outcrop, and its small size does not contain deeper truths about our solar system"What did he do Mars the little planet we know? Was it a simple accident or was it a "victim" of the turbulent early times of the Solar System? Perhaps one day, studying in depth both the planet and the Asteroid Belt, we can find an answer to this enigma.
The two main theories that explain the current size of Mars: A) A low density area born naturally in the protoplanetary disk and that remained intact once the formation of the planets began, leaving or migrating Mars towards it and affected its growth, and B) where Jupiter's migration brought chaos to this area, causing the "vacuum" in it and limiting the available material.
Mars, a terrestrial planet but much smaller than Earth and Venus, whose diameters are almost identical. This possibly marked its final destination as the arid, cold and dry world it is today.Why Is Mars So Much Smaller Than Earth?
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