Thursday, April 9, 2015

Moon was caused by collision of a planet similar to Earth – The Universal


 The planetary body collided with Earth and whose shock the Moon was formed may have had a similar composition of our planet, according to an article published in the journal Nature and could help to understand the origin of the Moon.
 


 


 During the first 150 million years after the formation of our solar system, a giant stellar body, about the size of Mars hit and joined with Earth, causing the expulsion of a giant cloud of rocks and other debris.
 


 


 Much of the numerical simulations indicate that most of the material that formed the Moon come from the merger of the residues in the cloud generated by the giant impact.
 


 


 However, samples of moon rock collected by the Apollo mission reveal that its composition is similar to that of Earth’s mantle, which has been a serious challenge to the model of formation of the Moon, taking into account also other stellar bodies in the solar system have different compositions.
 


 


 Astronomers led by Alessandra Mastrobuno-Battisti the Israel Institute of Technology, simulated collisions between protoplanets (small celestial bodies considered planetary embryos) and compared the composition of each planet that survived the impact with the body that hit him.
 


 


 The results of these simulations was that 20 to 40% of the bodies hit had similar planets with which they collided, while planets that formed as a result of these shocks tended to have different compositions composition.
 


 


 The article notes that combining the results of the simulations can be deduced that the celestial body that collided with the Earth should have a similar composition of our planet.
 


 


 The article’s authors suggest that these results may explain the similarities in composition between Earth and the Moon and why its composition is different from the other planets of the Solar System.
 


 


  Nature also publishes two articles that provide evidence for the theory that after the giant impact that formed the Moon, both this and the Earth was added “a final layer” of materials.
 


 


 The last measurements of tungsten isotopes from the Earth and the Moon have shown differences in composition that provide information about the early history of the system consisting of our planet and its satellite that can affect training models of the Moon.
 


 


 The bark and the mantle has excess iron associated items, such as tungsten, which has led to theorize that these elements come mostly “one last layer” of materials accumulated after the giant impact on the Moon formed.
 


 


 If this theory is true, one would expect that the Earth and its satellite had different compositions of tungsten, but so far they had not been detected so far.
 


 


 However, the two studies published in Nature by researchers at the Universities of Lyon (France) and Münster (Germany), respectively, indicate that tungsten Moon there is excess isotope 182W if Compare that exists in today’s mantle.
 


 


 
 


 


 kal
 

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