solar system are also discussed: in the inner planetary region, contributing to the formation of the planetary atmospheres and water reservoirs; in the asteroid and Kuiper belts, sculpting their primordial structures, and in the outer edge of the solar system, building up the Oort cloud of ...
Accretion processes in protoplanetary disks produce a diversity of small bodies that played a crucial role in multiple reshuffling events throughout the solar system and in both early and late accretion of planets. Application of thermo-chronometers to meteorites provides precise dating of the formation...
Earth’s origins are challenging to elucidate, given the lack of surviving terrestrial geology from the first 500 Myr of the Solar System. In this Review, we discuss breakthroughs in geochemistry and theoretical modelling that have advanced understanding of Earth accretion. Theory holds that solar...
This view is supported by U–Pb and I–Xe chronologies, which show that water delivery peaked ∼100 million years after the isolation of the Solar System. Introduction of water into the terrestrial mantle triggered plate tectonics, which may have been crucial for the emergence of life. ...
Solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation. Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular cr
1 . If accretion takes place in eccentric orbits as well, the rotation will be prograde and of the right order of magnitude.如果吸积发生在偏心轨道,则自转将是正向的,且快慢也合适。 2 . The selective accretion theory chalks it up to high gas density in the early solar system, during the ...
8、The evidence was in the steadyaccretionof Gmail features like instant messaging, audio - and then video - chat, and so on.(这一点可以从不断增多的Gmail功能上得到印证,如Gmail增加了即时通讯、音频聊天以及后来的视频聊天等等。) 9、In a one-star system like our solar system, the leading theo...
The accretion process creates heat and heavier particles sink to the center of the accumulating mass.增长的过程产生了热量,较重的粒子下沉到物质团的中心。 The program made a rough attempt to simulate the accretion process in the early solar system.程序粗略地模拟了早期太阳系的成长过程。
accumulation,buildup,increase,enlargement,addition 权威英汉双解 英汉 英英 网络释义 accretion n. 1. [c] 积聚层;堆积层a layer of a substance that is slowly added to sth 2. [u] 堆积,积聚(过程)the process of new layers being slowly added to sth ...
SOLAR NEBULAThe basic mass distribution and orbital structure of the Solar System are determined by the original mass and angular momentum of the solar nebula and planetary accretion effect. Dust-gas aerodynamic interac- tion in the gaseous solar nebula could lead to the formation of an outer ...