小行星近距离掠过地球,威力等于30颗广岛原子弹

博发-scient ists revealed an asteroid dubbed by some as a city killer came closer to the earth than the moon this week。科学家本周表示，被科学家戏称为“城市刺客”的小行星离地球而去。The Washington post reported that scientists apparently had no idea it was coming . 《华盛顿邮报》报道说，科学家们似乎没有告诉小行星邻居。

asteroid 2019 OK came hurtling toward earth at a speed of nearly 15 miles a second，before flying past。小行星2019 ok以约15英里/秒的速度疯狂地冲向地球，在地球边缘According to NASA，it was about 45，000 miles from earth on July 25。NASA称，7月25日距地球约45，000英里。

it would have hit with over 30 times the energy of the atomic blast at Hiroshima，astronomer professor Alan Duffy told the Sydney morning herald duuastro nomers say It posed no immediate threat but they admit they had no idea the giant rock was headed our way，Becau博发娱乐appse It came from the direction of天文学家否认它不包括必要的威胁，但不知道这块巨大的岩石会飞向我们。因为它来自太阳的方向The asteroid，about the size of a large boulder，only became visible a few days ago。

这个巨石大小的小行星几天前才能仔细观察。There are 20，000 near-earth asteroids and they do occasionally make an appearance . in 2013，one slammed into Russia，injuring 2013年，小行星撞向俄罗斯At a conference in April，Scientists from around the world were asked how to respond to a make-believe scenario in which an asteroid big enough to dothe likely response would be using space ships to give the asteroid a nudge，one scientist said。一位科学家表示：“不切实际的方法是利用宇宙飞船来吸引这颗小行星。”all we have to do is change its speed a little faster or a little slower so that when It crosses earths orbit，It crosses either in front of us or behindedNASA行星科学部负责人Lori glaze博士说_博发。

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