小行星

In the surrounding asteroid dust, there was a mineral similar to olivine, which is common here on Earth.

在环绕周围的小行星尘埃中，有与地球上常见的橄榄石很类似的一种矿物质。

Due to the dragging force, trajectories of spacecraft circling planetoid can departure from the standard taper curve orbit which is obtained by the two-body hypothesis.

绕小行星运行的航天器由于受到摄动力的影响，运行轨迹会偏离二体假设下的圆锥曲线轨道。

Astronomy software, shows you the complete night sky (340,000 stars) and our solar system in a 3D orrery view with the planets, asteroids, and comets from any place at any time.

天文学软件，向您显示完整的夜空（ 340000颗星）和我们的太阳系在一个三维orrery的看法与行星，小行星，彗星，从任何地方在任何时候。

The next largest asteroid, Pallas, has a diameter of 520 km.

第二大的小行星是智神星，直径520km 。

In Chapter 1, the resonant phenomena of the NEAs' movement are introduced, briefly expounded the concepts of the mean and secular resonances as well as the way of extracting the resonant parts of the expansion of the perturbation function, still well established the corresponding resonant models.

在第一章中，介绍了近地小行星运动中的共振现象，扼要地阐述了轨道共振和长期共振的概念、共振项的析取方法以及建立了相应的共振模型。

In the 19th century, a number of American and English scientists challenged the Nebular theory. They presented the "Planetesimal Theory", or the "Theory of the Little Planets".

在19世纪，一些美国和英国科学家挑战了星云说，他们提出"星子论"，或"小行星学说"。

Gravity pulled these planetesimals together, and the young Earth grew slowly, like a snowball, as more and more pieces collided with it. Each planetesimal would have been moving pretty quickly as it crashed into the new planet, and all that speed was converted into another form of energy--heat.

地球的引力将这些小行星体凝聚在一起，就象滚雪球一样，随着越来越多碰撞碎片的聚集，地球的体积日渐成长，每一个星体碰撞形成新饿地球板块时速度及其之快，所有的这些速度形成另一种能量--热量。

The Giant Impactor Theory (sometimes called The Ejected Ring Theory): This theory proposes that a planetesimal the size of Mars struck the Earth just after the formation of the solar system, ejecting large volumes of heated material from the outer layers of both objects.

巨人冲击理论：这种理论认为，一个小行星的火星大小刚刚发生后，太阳系的形成地球，退出从外层激烈的大量材料两个对象。

Requests you to provide the appraisal to this kind of planetoid hit.

要求你们对这样一颗小行星的撞击提供评估。

Has not been wrong, he once is mistaken for was a planetoid.

没错，他曾经被误认为是一颗小行星。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。