月球巨撞击起源的最新模拟

发布时间：2018-03-25 23:00

本文选题：月球　切入点：地球　出处：《自然杂志》2014年01期

【摘要】：月球的起源与地球有密切关系。自1880年提出月球是从地球分裂出去的假说以来,科学家们提出了多种假说。近30多年来流行的是巨撞击假说,认为有颗称为忒伊亚(Theia)的星体撞击原地球,抛出的物质很快聚集形成地球的卫星——月球。行星形成过程的观测和理论研究确信地球吸积晚期经历过巨撞击,而月球的探测资料提供其起源的约束,计算机模拟方法的发展可以量化地跟踪撞击演变过程,得到符合约束的合理情况的可能范围。介绍三种最新的最佳模拟及其结果,虽然有所不同,但在很多关键问题上取得了重要进展,并得到一些普遍的结论。解决了地球和月球起源的基本问题,但还需要进一步研究遗留的或可能提出的新问题。
[Abstract]:The origin of the moon is closely related to the earth. Since the hypothesis that the moon split from the earth in 1880, scientists have put forward a variety of hypotheses. What has been popular for more than 30 years is the giant impact hypothesis. It is believed that a star called Theia (Theia) struck the original Earth, and that the ejected matter soon gathered to form the moon, the moon, where the planet formed. Observations and theoretical studies of the process of planetary formation are convinced that the Earth experienced a great impact in the late accretion period, The lunar exploration data provide the constraints of its origin, and the development of computer simulation methods can quantitatively track the evolution of the impact and obtain the possible range of reasonable conditions consistent with the constraints. Three new best simulations and their results are introduced. Although different, important progress has been made on many key issues and some general conclusions have been drawn. The basic problems of the origin of the Earth and the Moon have been solved, but further studies are needed on the remaining or possible new problems.
【作者单位】：南京大学天文学与空间科学学院;
【分类号】：P184

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