Supercomputing to simulate or solve the mystery of the formation of the moon

According to a new supercomputer simulation published in the Journal of the Royal Astronomical Society, the moon was probably formed about 4.5 billion years ago by a collision between the earth and the Mars sized planet Theia. British scientists have produced a number of animations of simulated scenes, each of which shows the scene that TYA approaches the earth with different spin quantities, and depicts various explosion patterns of rock debris emitted from the impact point, which may eventually converge into the moon. these simulations are based on what astronomers usually call the "big splash" theory or the "huge shock" hypothesis. According to theory, Taiya, about 6100 kilometers in diameter, crashed into the earth with a diameter of 12741 kilometers, forming a ring of debris around our planet, which eventually gathered together to form the moon. The simulation was carried out on a Dirac high performance computing device in collaboration with the University of Glasgow. The researchers tracked material from earth and early Taya four days after the collision. Eventually, the simulation produced an orbiting object that could evolve into something similar to the moon. the simulation of Taiya's collision with the early earth produced different results, depending on the size and direction of TYA's initial rotation, from not rotating at all to spinning like a dance ball, and clockwise or counterclockwise rotation. in one extreme case, the maximum rotation of the collision is clockwise, which merges the two objects; in the other extreme case, the maximum rotation of the collision in the counter clockwise direction produces the scratch of the two objects. in the simulation without adding any spin to Taya, a piece of self gravitating material with a mass of about 80% of that of the moon is generated; after adding a small amount of spin to the simulation, another moon like object is created, which researchers call the "prototype moon". The mass produced by the simulation results has been proved to be able to be placed in the orbit around the earth after the impact, and it will grow by sweeping the debris disk around the earth. The simulation mass also has a small iron core similar to the moon, and the outer layer is made up of the early Earth and Taya. the researchers said that although the simulation results are not definitive evidence of the origin of the moon, they are advances in understanding how our nearest neighbor formed. They also plan to conduct further simulations to understand the impact on the formation of a potential moon by changing the mass, velocity and rotation speed of the target and impactor. (reporter Feng Weidong)

2023-03-22 10:04:24

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