Earth’s Doomed Sister World?February 10, 2021
Imagine what it would be like if Mars fell on our Earth. As improbable as it sounds, something like this really happened about 4.5 billion years ago, and this last catastrophic explosion would have produced our moon. The collision of a protoplanet the size of Mars, which astronomers call Teia, can explain both the mass of our moon and its unusually small iron core, as well as the extremely high speed of rotation of the ancient Earth. The problem is that this widely popular theory of collision with giants creates the Moon, largely derived from the tragic and doomed Teija, not the Earth – and the Earth and its moon have many mysterious chemical similarities. However, in April 2015, a group of planetary scientists revealed that Teia, the last body to fall to Earth, could be similar enough to our planet to create a moon with an earthly composition.
Based mainly on the observed differences between our planet and Mars, planetary scientists usually thought that Theia’s composition would be very different from Earth’s. Indeed, It is believed that Teia was born in another region of our solar system. As a result, a giant collision is likely to form the Moon, which will be chemically different from Earth. Instead, Earth and its favorite closest satellite in space are almost chemically identical in many ways. In a research paper published in the April 9, 2015 issue of the journal Nature, a team of astronomers estimated a significant probability – about 20% – that the giant drummer that Tea was doomed would have an earthly composition. This discovery offers at least a partial solution to the mysterious problem facing the theory of collisions, called the isotopic crisis. A new paper describing the study is published under the title “The Original Origin of The Compositional Relationship Between the Earth and the Moon.” The study’s lead author, Dr. Alessandra Mastrobuono-Battisti, from the Technion Physics Department of the Israel Institute of Technology, Haifa.
The main problem with the theory of a giant impact or any other hypothesis explaining the origin of the Moon is that the ratio of different isotopes of a particular element differs slightly between samples obtained from Earth, the Moon and Mars, as well as the main asteroid. The belt encircling our Sun between the orbits of Mars and Jupiter. The term isotope refers to one of two or more atoms that have the same number of protons, but different numbers of neutrons in their nuclei – and therefore vary in relative mass, but not chemical properties.
In the scientific definition of the origin of the moon, oxygen may be the most studied isotope. Earth and the Moon have almost the same isotopic composition of oxygen, while the difference in oxygen composition between terrestrial rocks and meteorites from Mars or a large asteroid Vesta (the inhabitant of the main asteroid belt) is significant. The Earth and its moon also have similar isotopic compositions for tungsten, silicon, chromium and titanium – elements whose isotope content varies depending on Martian meteorites and the main asteroid belt.
So how could the collision of two large, independently formed protoplanets – Earth and Teyi – create a chemically similar Earth and Moon, when Mars and most meteorites are so different? That’s the question!
Since the rocks of the Earth and the Moon have a similar composition, it is convincing that our planet and the broken Teya also had to be very similar. The Earth and the horrific tragedy of Teya must be the planets-sisters! This would indicate that the doomed primitive world duo had a much closer relationship than any other inhabitant of the planet observed in our solar system. It used to be about 1% likely to be this – an “unpleasantly rare” chance, according to Dr. Robin Kanup, a planetary expert at the Southwest Research Institute in Boulder, Colorado. Dr. Kanup is the author of an accompanying article in News and Views on a new study published in Nature on April 9, 2015.
The worlds that collide will be very similar because of their identical distance from our Sun – this will mean that both bodies were born from the same type of flying protoplanetary material. “Earth and the Moon are not twins born from the same planet, but they are sisters in the sense that they grew up in the same environment,” Dr. Peretz said in a press release Nature.com April 8, 2015.
This supercomputer simulation mimics the “space gallery of fire” that characterized our solar system in its early years – it was a cruel place, and proto-Earth experienced a long series of violent and catastrophic collisions with other protoplanets.
According to the theory of giant collisions, the grand finale of this long series of destructive collisions was the catastrophic crash of Teya – a protoplanet that is only ten times lighter than Earth – and the debris eventually merged into the moon.
What a mess!
Although the giant impact theory – first coined in the 1970s – is widely considered the most likely explanation for the moon’s birth, several other less likely scenarios have been suggested over the years to explain the mysterious origin of the moon. Moon. An alternative model shows that the moon was once part of our home planet and erupted about 4.5 billion years ago. According to this theory, the most likely place where this lunar event occurred is the Pacific Basin. The second model claims that the moon originally formed in another region of the early solar system, but came too close to the Earth’s powerful gravitational embrace, where it was trapped in orbit to become our Moon. The third scenario suggests that the interaction between rotating and rotating planetary building blocks, called planet-zimals, has led to the death of many of them. According to this model, the beautiful Earth moon emerged from the debris left by ancient powdered planets. The fourth alternative scenario assumes that both the Earth and the Moon were born simultaneously from the gas and dust of the original protoplanetary accretion disk, from which the family of objects of our Sun eventually emerged.