Around the protostar, a large flat discof dust, rock, and ice, which would become the planets, moons, and asteroids in the solar system, collected.This initial stage in the formation of the solar system lasted approximately 100,000 years. Next,the planets formed through the process known as...
Any model of the origin of the solar system must explain why all the planets orbit the Sun in the same direction and in nearly the same plane. One model that wasdevisedexplicitly to address this issue was the tidal hypothesis, proposed in the early 1900s.Two nearby planets, stars,...
Paragraph 1:The orderly nature of our solar system leads most astronomers to conclude that the planets formed at essentially the same time and from the same primordial (original) material as the Sun. This material formed a vast cloud of dust and gases called a nebula. The nebular hypothesis s...
Pierre-Simon deLaplace independently suggested that this state of affairs could not be a coincidence.They proposed that our entire solar system-the Sun as well as all of the planets, satellites,asteroids, and comets—formed from a vast, rotating cloud of gas and dust called the solarnebula. ...
托福阅读真题第216篇OriginoftheSolarSystem(答案文章最后) Origin of the Solar System Paragraph 1:The orderly nature of our solar system leads most astronomers to conclude that the planets formed at essentially the same time and from the same primordial (original) material as the Sun. This material...
【解析】题干问的是：根据第 2 段，下列关于十八世纪太阳系起源理论的说法，哪一个是正确的？根据题干the origin of the solar system定位到段首句：关于太阳系起源的一个关键证据是，所有的行星都在同一个方向和几乎同一个平面上绕太阳公转，对应A选项。
Comets(彗星) are made from debris left over when our Solar System was formed.The solid part of a comet,the nucleus,is a chunk of ice typically measuring a few kilometres across.The ice in a comet is mainly made up of frozen ammonia,methane and water.Harvard University astronomer Fred L....
This material formed a vast cloud of dust and gases called a nebula. The nebular hypothesis suggests that all bodes of the solar system formed from an enormous nebular cloud consisting mostly of hydrogen and helium as well as a small percent of all the other heavier elements known to exist....
In this essay, we will discuss the two prevailing theories regarding the origin of the solar system: the nebular theory and the capture theory. The first and most widely accepted theory is the nebular theory, which suggests that our solar system formed from a rotating cloud of gas and dust ...
The solar system includes the Sun, planets, dwarf planets, moons, rings, asteroids, comets, and particles of dust.