The planet Theia is the interior of the solar system.
Sometimes we talk about the great mass extinctions, the great cuts and bottlenecks that affected life on Earth or even the human species, but and the extinctions of planets, because the Earth, if it has survived the first chaotic times of the formation of the solar system and managed to emerge from them with the necessary elements for life to form, it was due to a cluster of fortunate events and one of them was the impact of the planet Theia.
The impact did not mean that the Earth swallowed that planet, a planet approximately the size of Mars, there are still remains of that planet inside the Earth's interior and that was what was investigated in this other investigation just last year, on November 1, and all these remains that are inside the Earth can affect to some extent, perhaps the Earth's magnetic field, or maybe even the movement of the tectonic plates, some influence they may have in there, it is not very well known, but those enormous blocks of this planet that was not completely disintegrated.
A large part of it, together with material from the Earth, ended up forming the Moon and this was fundamental because the moon, our moon, is enormous, the Moon is the fifth largest natural satellite in the solar system and the largest in relation to its planet, it is only surpassed by Ganymede, Titan, Callisto and IO, and then there are others, a couple of moons of a similar size that would be Europa, the frozen moon with an ocean under its icy surface that is a bit smaller than our Moon and the Moon Triton, which is also a very interesting world, it is believed that it also has water under the surface and also has a large amount of organic matter, organic molecules, if you prefer.
This impact, apparently, occurred about 4.5 billion years ago, it is not the first time that they have studied this topic, the video above is a few years old and is still a controversial issue, the current debate revolved around whether Theia originated in the inner solar system near the Sun with rocky material similar to that on Earth or on the outside with more carbon-rich material, but this recent study reveals something new, it is that it places Tella at a specific point of formation in the system solar.
And it does so using iron isotopes in samples that have been taken on the Moon, terrestrial rocks and in meteorites that represent the remains of the primitive solar system, in addition they also analyzed elements such as molybdenum, ruthenium and zirconium, with all this and with simulations of impacts and all the previous material,
They concluded that Theia was formed at a point a little even closer to the Sun than the Earth was and that it basically had the same composition as the Earth and therefore the Moon, in fact, the Moon has the same composition as the Earth.
There is a difference in that there are fewer metals on the moon, so do not think of going to the moon and finding gold, platinum or silver mines, because the moon was basically formed with material from the crust of Theia and the Earth, so it has few metals, curiously it does have a lot of iron, perhaps due to the impact of metallic asteroids it has a lot of iron and mines, areas with iron deposits have been located, even with a higher concentration of iron than in most terrestrial deposits.
According to the analyzes of these researchers, this planet Theia was formed in the inner solar system, perhaps even a little closer to the sun than the proto-Earth, it did not incorporate materials from external regions, all of Theia's material was formed in the rocky part of the solar system.
What could have caused Theia to end up leaving its orbit and crashing into Earth? And why don't we have super-Earths in the solar system like in other systems? Our solar system is quite rare, it does not have a very normal configuration, it is a stable configuration, which is good for us, but it is not one of the most common, it is common to find, for example, planetary systems where there is a gas giant very close to its star burning up, this is what is called hot Jupiters, and it is also common to find systems with a large number of super-Earth type planets.
Super-Earths are a type of very abundant planets that we have found in the system, in the galaxy, in planetary systems and it is quite common to find planetary systems where there are several rocky planets, some super-Earths and all quite close together, that is, between the distance that separates Mars from the Sun, there are systems, there are places, there are stars where you could easily find six planets in that distance, even less.
The explanation for both Theia crashing into the Earth and the fact that we do not have super Earths, is that Jupiter, in its approach to the sun and its braking by Saturn, caused Theia to be pushed and impact with the Earth.
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