当前位置: X-MOL 学术Nature › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The shaping of terrestrial planets by late accretions
Nature ( IF 50.5 ) Pub Date : 2025-05-28 , DOI: 10.1038/s41586-025-08970-8
Simone Marchi 1 , Jun Korenaga 2
Affiliation  

Terrestrial planets—Mercury, Venus, Earth and Mars—formed by the accretion of smaller objects. The Earth was probably the latest terrestrial planet to form and reached about 99% of its final mass within about 60–100 Myr after condensation of the first solids in the Solar System. This Review examines the disproportionate role of the last approximately 1% of planetary growth, or late accretion, in controlling the long-term evolution of the Earth and other terrestrial planets. Late accretion may have been responsible for shaping Earth’s distinctive geophysical and chemical properties and generating pathways conducive to prebiotic chemistry. Differences in the late accretion of a planet may provide a rationale for interpreting the distinct properties of Venus and Earth (for example, tectonism, atmospheric composition, water content), the surface dichotomy of Mars and the high core-to-silicate mass ratio of Mercury. Large collisions and ensuing processes are likely to occur and modulate the evolution of rocky exoplanets as well, and they should be considered in our quest to find Earth-like worlds.



中文翻译:

晚期吸积对类地行星的塑造

类地行星——水星、金星、地球和火星——由较小的天体吸积形成。地球可能是最近形成的类地行星,在太阳系中第一批固体凝结后,在大约 60-100 Myr 内达到了其最终质量的 99% 左右。本综述研究了行星增长的最后大约 1% 或延迟吸积在控制地球和其他类地行星的长期演化中不成比例的作用。晚期吸积可能是塑造地球独特的地球物理和化学特性并产生有利于益生元化学的途径的原因。行星晚期吸积的差异可能为解释金星和地球的不同特性(例如,构造、大气成分、含水量)、火星的表面二分法以及水星的高核心与硅酸盐质量比提供理论依据。大型碰撞和随之而来的过程可能会发生,并调节岩石系外行星的演化,在我们寻找类地世界的过程中,应该考虑它们。

更新日期:2025-05-29
down
wechat
bug