Lindley Johnson, head of the near-Earth object program at NASA headquarters in Washington, D.C., says an asteroid the size of a football field could wipe out a major city.
在华盛顿的美国宇航局总部的近地天体计划负责人林德利-约翰逊说，如果一颗足球场大小的小行星撞上了地球，其威力可以毁灭一座大型城市。
The Near-Earth Object Observation Program, commonly called "Spaceguard, " also plots the orbits of these objects to determine if any could be potentially hazardous to our planet.
近地天体观察项目，常被叫做“太空警卫”，也对这些天体绘制了轨道图来判断其中是否有天体可能对我们的星球有潜在危险。
This estimate was alarming; it was the first time an asteroid had been promoted to "Level 4" on the Torino Scale -- a near-Earth object (NEO) impact hazard categorization method.
这样的预测令人担忧，这是在评价近地天体（NEO）撞击危险程度的 “托里诺分类表”（THETORINOIMPACT HAZARDSCALE）中第一次有小行星进入“4级”（译注：该分类表最高为10级）。
For asteroids too big for a robot to handle a large spacecraft could fly near the object to act as a gravity tractor that deflects the asteroid's trajectory sending it toward Earth.
对于机器人无法捕获的较大的行星，则派一艘大型宇宙飞船接近，利用重力牵引使行星偏离轨道，飞向地球。
For asteroids too big for a robot to handle, a large spacecraft could fly near the object to act as a gravity tractor that deflects the asteroid's trajectory, sending it toward Earth.
如果行星对于机器人来说比较大的话，也可以使用一艘大型的宇宙飞船将行星拉离原有的轨道，而向着地球的方向前进。
The object, called P/2010 A2, was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) sky survey on Jan. 6.
这个被称为P/2010A2的项目，由林肯近地行星研究室发现，并被写进1月6日的天文观测报告里。
The list has been compiled by researchers from the University of Southampton using software called called NEOimpactor, short for NASA's ‘NEO’ or Near Earth Object programme.
这份名单是由来自难开普敦的研究学者们利用一项名为NEOimpactor的软体所测算出来的，NEO是美国宇航局近地面项目的英文缩写。
"We are extremely confident, 100% confident, that this is not a threat," said Don Yeomans, manager of NASA's Near Earth Object Observations program, which makes it its business to know these things.
“我们极其自信，有100%的信心，这不会造成威胁，”姚曼斯博士说，他是NASA近地球物体观测项目的经理，了解这些是他必做工作。
An enormous object, like the earth, generates a gravitational field, this field causes a downward pull on all objects near its surface.
一个巨大的物体，如地球，产生重力场。这个场对所有它表面附近的物体都产生一个向下的力。
In the Flexible Path presentation, a mission to Near Earth Object 1999ao10 is outlined, requiring a launch date of January 2, 2026.
在灵活路线图演示中，陈述了一个访问近地球目标1999ao10的任务，这要求在2026年1月2日的发射。
In the Flexible Path presentation, a mission to Near Earth Object 1999ao10 is outlined, requiring a launch date of January 2, 2026.
在灵活路线图演示中，陈述了一个访问近地球目标1999ao10的任务，这要求在2026年1月2日的发射。
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