Giant Impact According to the hypothesis, the Earth-Moon system was approximately 4.5 million years ago when Mars-sized objects were against the Earth. This effect released massive quantities of material that combined Earth and Moon together. Over time, the Moon moved further from the Earth and assumed its orbit.
Since then, there have been regular exchanges between the Earth and the Moon due to surface effects. According to recent research, the Earth's most ancient sample of the Earth's impact on Hadean Eon (about 4 million years ago) could be transmitted to the Earth. Apollo 14 astronauts
The study was recently published in the journal Letters of the Earth and the Scientific PlanetJeremy Bellucci directed the Swedish Natural History Museum, and is part of the Lunar and Planetary Institute (LPI), many universities and the Lunar Science and Exploration (CLSE) center, the Virtual Institute of Solar System Exploration Research at NASA.
This finding was made possible thanks to the technique developed by the study team to find parts of the impact on the lunar regular. Development of this technique David A. Kring – Principal Researcher at CLSE and LIS University Researcher at the Space Research Association (USRA) – The challenge of finding a part of the Moon on Earth.
The study found that 2 g (0.07 oz) parts of quartz, feldspar and zirconia were found. Rocks of this kind are found on the Earth, but they are unusual in the Moon. Additionally, a chemical analysis revealed that crystallized rock crystallized into an oxidized system and the Earth's temperatures during the Hadean; More than the moon, at that time there were higher temperatures.
As Dr. Kring noted in the latest LPI press release:
"It is a wonderful encounter that helps to improve the initial image of the Earth and the bombing that changes the life of our planet."
Based on its studies, the groups concluded that the rock had emerged from Hadean Eon and was driven by a large asteroid or comet from the Earth. This influence could contaminate the material in space, where it hit the moon's surface, three times closer to the Earth. In the end, this stone material is mixed with lunar regulation to form a single sample.
The group has also been able to learn a lot about the history of rock in the sample. On the one hand, they concluded that the rock emits a surface area of 20 km (12.4 m) below the surface area of 4.0. and 4,100 million years ago, and then pricked one or more of the great impacts that he had sent into the cis-lunar space.
This is consistent with the impacts that occurred in the past, that is, Late Heavy Bombardment (approximately 4.1 and 3.8 million years ago), the craters produced thousands of kilometers in diameter, 20 km deep (12.4 m) space
In addition, there were several effects that affected many other events when it reached the lunar surface. One of the three samples that melted about 3.9 million years ago, buried it beneath the surface. At that time, the moon was less influential and more frequent, and gave it the surface of today.
This last effect event took a sample of about 26 million years ago, during the Paleogene era on Earth. This effect produced a cone diameter of 340 m (1082 ft) in diameter and was constructed on the rock surface of the sample. This crater was the location of the territory Apollo 14 In the 1971 mission, astronauts achieved mission missions to retrieve Earth (including rock of the earth).
The research team admits that it is possible that the sample could be crystallized in the Moon. However, any lunar samples obtained to date would still be required to meet the requirements. For example, samples should deeply crystallize inside the mantle. In addition, the composition of the moon is shown in deep depths, for example, similar to that found in the sample rock.
As a result, the easiest explanation is the earth that occurred on the ground, the discovery of controversies. This is inevitable, since it has been since the first sample found in the Hadean, and its discovery site is likely to be an add-on factor.
However, Kring would announce that there are more samples, as Hadean's rocks could have ground on Earth's bombing. Perhaps, when missions begin to travel throughout the Moon over the next decade, they will select the oldest samples from the Earth's rock.
The support provided by NASA's Solar System Exploration Research Institute (SSERVI) was part of a collaboration between LPI and NASA Johnson Space Center.