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听说7年后小行星撞地球?该如何是好?
我们不妨拿气象部门预测台风登陆点来比喻这个撞击概率,比方说台风还在海面上,此刻预测有长达1000公里的海岸线都有可能成为登陆点,而地球是这条1000公里海岸线上一个直径10公里的小镇,于是撞击概率大约就是1%。观测的小行星时间越久,轨道弧段越来越长, ...
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