天文学家们首次发现它时是在寻找介于这两大行星间的另一个行星。
Astronomers first spotted it when looking for a new planet they thought should exist between these two.
行星对人类的作用以不同的形式表现出来，受其黄道带位置及其与其他行星间的关系的影响。
These planetary forces take on different forms, depending on their zodiacal positions and on the way they relate to one another.
计算机工程：一个修改版的互联网通讯协议正在太空船上进行测试，此协议专门用于行星间通讯。
Computing: a modified version of the Internet's communications protocol, devised for interplanetary use, is being tested by spacecraft.
它将探测星际间存在的神秘磁场，而且其分辨力将有助于寻找太阳系外的行星。
It will probe the mysterious magnetic field that exists between the stars, and its resolving power will help with the search for extrasolar planets.
这里想表达的观点是，当地球从行星胚胎间相互碰撞缓慢形成时，火星却是一个孤独的行星胚胎，在太阳系历史上形成得很早。
The idea here is that - while Earth formed slowly from planetary embryos colliding - Mars is itself a solitary planetary embryo that formed very early in the history of our solar system.
小行星是较小的行星，它们中的大部分在火星和木星轨道间的小行星带中环绕太阳运行。
Asteroids are minor planets, most of which circle the sun in a region known as the asteroid belt, between the orbits of Mars and Jupiter.
这两颗较大的小行星也被称为“原行星”，通常认为这两颗小行星形成于同一时间，并且其形成环境与水星、金星、地球和火星相同。
Both large asteroids, also known as' protoplanets, 'are believed to have formed at the same time and in similar environments as Mercury, Venus, Earth, and Mars.
虽然行星状星云阶段持续约1万年，天文学家估计其外晕的丝状物质年龄在5万至9万年间。
While the planetary nebula phase is thought to last for around 10, 000 years, astronomers estimate the age of the outer filamentary portions of this halo to be 50, 000 to 90, 000 years.
结果在他们的样本中有20个表面未受腐蚀的小行星都曾靠近过地球，在过去的50万年间，它们离地球的距离都曾在地月距离之内。
Of the 20 fresh, pristine-looking asteroids in their sample, each had traveled close to Earth - within the distance from the Earth to the moon - in the past 500, 000 years.
行星架的结构设计和制造质量，对各行星轮间的载荷分配以至传动装置的承载能力、噪声和振动等有很大影响。
The structure design and quality of planetary carriers are closely related to the load distribution among planet wheels, the carrying capacity, noise and vibration of gears.
因此，有行星在对方的第七宫将表示相互间的吸引力。
Thus, having planets in someone's 7th house in synastry is indicative of mutual attraction.
它们将用10年时间对剩下90%的危险小行星进行编目。
They should take about ten years to catalogue 90% of the remaining dangerous asteroids thought to be out there.
这颗行星过于遥远，以接近光速飞行的宇宙飞船都要花费20年时间才能抵达。
The planet is so far away, spaceships travelling close to the speed of light would take 20 years to make the journey.
也许还可能解释这样的事实，那就是在过去大约1亿年间，撞击地球的小行星的数量是原来预计的两倍。
They are probably also the explanation for the fact that, over the past 100m years or so, the number of asteroids that have hit the Earth is about twice that which would have been expected.
视我们采取哪一种运载方式而定，如果我们采用现有的借其他行星的引力来助推的技术，那么最快也需要19000年时间才能到达比邻星。
Depending on the method of transport, if we were to use today's technique of gravitational slingshots around other planets, the quickest transit time would be 19, 000 years!
在火星和木星的轨道间分布着小行星带，之中有一颗矮行星谷神星。
Between the orbits of Mars and Jupiter lies the asteroid belt, which includes the dwarf planet Ceres.
我们太阳系的有序特性使大多数天文学家得出结论，这些行星基本上在同一时间形成，且物质来源和太阳的一样。
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 material as the Sun.
因此对行星传动机构的均载性能及影响行星轮间载荷分配的因素进行分析有着重要的现实意义。
Therefore, it is necessary to study the load average performance of Planetary Gear transmission and the influence of load allocation between Planetary Gears.
它将探测星际间存在的神秘磁场，而且其分辨力将有助于寻找太阳系外的行星。
It will probe the mysterious magnetic field that exists between thestars, and its resolving power will help with the search for extrasolarplanets.
它将探测星际间存在的神秘磁场，而且其分辨力将有助于寻找太阳系外的行星。
It will probe the mysterious magnetic field that exists between thestars, and its resolving power will help with the search for extrasolarplanets.
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