The so-called Gravity Tractor could maintain a position near the threatening asteroid, exerting a gentle tug that, over time, would deflect the asteroid.

被称为地心引力牵引器将能处于一个离具有威胁的小行星附近，施加一个小的拉力，长时间下去，就可以让小行星拉离轨道。

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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。

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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。

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The alternative method of a gravity tractor spares the spacecraft the need to land.

CNN: Space's threat to civilization

The ways to deal with the threat include simply flying a spacecraft into an errant asteroid or either attaching one to it or parking one alongside it, like a gravity tractor, to pull it into another orbit.

CNN: Space's threat to civilization