When light passes near a massive object, its path gets bent, like a car driving on a curved, banked road.
当光线接近一个巨大物体时，光的路径会变弯，就像汽车在弯曲的车库道上行驶一样。
2
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。
3
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.