【摘要】 晚期重轰击(一般又称为月球灾难,简称LHB)指的是距今约3.8~4.1 Ga时段月球受到大量陨石的轰击,于月面上形成的大量撞击坑,并推论地球、水星、金星和火星也经历了这样一次重轰击。Nice模式是关于太阳系动力学演化的一种设想:在初始原行星气体星盘消散之后很久,大行星从最初紧凑的组构迁移到目前的位置。这个行星迁移理论用来解释包括内太阳系的晚期重轰击,以及Oort云、Kuiper带、海王星和木星Trojans行星等形成的历史事件。更多还原

【Abstract】 The Late Heavy Bombardment(LHB),which is commonly referred to as the lunar cataclysm,is a period of approximate from 3.8 to 4.1 Ga when a large number of impact craters are believed to have been formed on the Moon,and is inferred that have happened on the Earth,the Mercury,the Venus,and the Mars as well.The Nice model is a dynamical evolution scenario of the Solar System.It was named after the location of the Observatory of the Cote of Azur,CNRS in Nice,France,where it was initially developed.Nice model proposes that giant planets migrated from initial compact configurations into their present positions,long after the dissipation of the initial protoplanetary gas disk.This planetary migration is used to explain historical events including the Late Heavy Bombardment of the inner Solar System,and the formation of the Oort cloud,the Kuiper belt,the Neptune and the Jupiter Trojans etc.更多还原