KH报道。当你听说小行星与地球接近时，很可能印入脑海的场景是撞击、灭亡、灾难，或者想到勇敢的星际牛仔们想尽一切办法改变小行星的轨道。
When you hear about asteroids close to the Earth , you probably have visions of collisions and extinctions and a postapocalyptic future . Or of brave space cowboys trying to knock them off course .
星际牛仔