近地小行星

尤其是对近地小行星的观测研究具有很强的现实意义。

Especially the observational study of NEA has realistic significance .

最近的观测研究表明某些小行星可能是由彗星演变来的，而某些近地小行星可能来源于主带小行星和死亡的彗核。

Recent observations and studies indicate that some of asteroids have originally relation with comets and some of NEA originate probably form main-belt asteroids and extinct cometary nuclei .

天文学家已经在识别并追踪近地小行星，试图找到潜在的威胁。这将在NASA选择目标时起到一定作用。

Astronomers already are identifying and tracking near-Earth asteroids in an attempt to find potential threats , which will help as NASA chooses a target .

这些是仅去年一年被发现的1556个近地小行星。

These are the 1556 near-Earth asteroids discovered just last year .

关于近地小行星轨道演化的初步探索

A preliminary investigation of the orbital evolution of near-Earth asteroids

近地小行星轨道演化的研究

The study of the orbital evolution of the near-Earth asteroids

但是智慧号仍在运转，寻找近地小行星。

But WISE still found work , scanning for asteroids near Earth .

我们必须继续搜索天空，寻找近地小行星。

We must keep searching the sky for near-Earth asteroids .

近地小行星有20000颗，偶尔会出现。

There are 20000 near-Earth asteroids and they do occasionally make an appearance .

近地小行星探测转移轨道方案设计与优化

Design and optimize scheme of transfer trajectory for near Earth asteroid exploration mission

近地小行星与主带小行星和短周期彗星之间的关系。

The relation of NEAs to main-belt asteroids and to short period comets .

这张图显示了近地小行星绕太阳运行的轨道，用黄色标出的部分，

This graphic shows near-Earth asteroids orbiting around the Sun , shown in yellow ,

辛算法在近地小行星轨道演化数值研究中的应用

The application of symplectic algorithm on Numerical Research of the orbital evolution of the NEAs

它能在大约几个星期内就检测出两倍于目前已知数量的近地小行星。

It could double the known count of near-Earth asteroids in a matter of weeks .

所谓小天体，是指那些可能与地球相撞的近地小行星、短周期彗星和长周期彗星。

The small objects are the near-earth asteroids , short-period and long-period comets striking the Earth .

天文学家一共发现了超过10000颗近地小行星，大约100颗近地彗星。

Altogether more than 10000 near-Earth asteroids , and almost 100 near-Earth comets , have been discovered by astronomers .

迪曼蒂斯喜欢宏大的构想，他的最新创意涉及从近地小行星上开采矿物。

He likes to think big , and his latest brainstorm involves trying to mine minerals on passing asteroids .

智慧号应该能发现大约150颗近地小行星，并且能再发现2000颗左右。

WISE should be able to find some 150 new near-Earth asteroids and get a better handle on another 2000 .

据了解，目前为公众熟悉的小行星有主带小行星，还有轨道比较奇怪的近地小行星和半人马小行星。

Currently , the public is familiar with the main-belt asteroids and the near-Earth asteroids with strange orbits , including the Earth-approaching asteroids and the centaurs .

冰彗星上全是水，并且现在美国宇航局正在寻找一种全是岩石的近地小行星。

Icy comets are full of it , and NASA is currently in the process of looking for it on a number of rocky near-earth asteroids .

目前已探明的近地小行星约有9000颗，其中大部分是地面计划在寻找可能撞击地球的天体时探测到的。

At the moment , about 9000 NEAs are known , most of them courtesy of ground-based programmes looking for bodies that might one day hit Earth .

不同于绝大多数近地小行星的轨道，这颗小行星的轨道几乎是圆形的，而通常近地小行星的轨道很古怪，呈鸡蛋型，在整个太阳系中穿梭。

And unlike most near-Earth asteroids - whose eccentric , egg-shaped orbits take them straight through the solar system - this asteroid 's orbit 's almost circular .

近地小行星约会外太空探测器在对厄罗斯小行星研究了一年后才进行着陆。一艘美国无人驾驶探测器在一个小行星上首次着陆。

The NEAR-Shoemaker probe touched down after studying the asteroid Eros for the past year . An unmanned American spacecraft has made the first ever landing on an asteroid .

两年前我制定了一个目标，2025年把人类送向近地小行星，21世纪30年代把人类送向火星那些我们从未涉足过的更遥远太空。

Two years ago I set a goal of sending humans farther into space than we have ever been - to an asteroid by 2025 and to Mars in the 2030s .

近年来对近地小行星的观测和研究已全面开展，这已成为当今太阳系研究的前沿领域之一。

In the recent years , the observations and studies on NEA are well developed , Which becomes one of the most important field of the study of the solar system .

火星环球探测器已经运行了比其它发送到火星上去的任何其它卫星的时间都长。近地小行星约会外太空探测器在对厄罗斯小行星研究了一年后才进行着陆。

Mars Global Surveyor has operated longer than any spacecraft ever sent to the red planet . The NEAR-Shoemaker probe touched down after studying the asteroid Eros for the past year .

全面地介绍了近年来关于近地小行星（小天体）的研究状况，包括对近地小行星轨道演化的研究方法和主要结果。

In this paper the research of the NEAs has been thoroughly reviewed , and the exploration methods of the orbital evolution and the main results with respect to the NEAs are included .

根据林肯近地小行星研究小组进行天空观测时所记录下来的观察资料，P/2010A2在小行星带主带内部围绕着太阳旋转。

The object , dubbed P / 2010 A2 , orbits the sun well within the main asteroid belt , according to observations taken as part of the Lincoln Near Earth Asteroid Research sky survey .

那些还不是那里全部的那么大的小行星，但他们也可称作近地小行星&意思是他们的轨道与我们绕太阳的轨道交叉或很接近。

Those are hardly the only asteroids of that size out there , but they 're the ones that also qualify as near Earth & which means they cross or approach our orbit around the sun .

首先，要找到一个可能有矿藏的小行星。目前已探明的近地小行星约有9000颗，其中大部分是地面计划在寻找可能撞击地球的天体时探测到的。

The first thing is to locate a likely prospect . At the moment , about 9000 NEAs are known , most of them courtesy of ground-based programmes looking for bodies that might one day hit Earth .