该国紧急事务部称该事件是“流星雨形状似火球”,并表示辐射值属正常,同时敦促居民不用恐慌。
Chelyabinsk city authorities urged people to stay indoors unless they needed to pick up their children from schools and kindergartens. They said a blast had been heard at an altitude of 10,000 meters (32,800 feet), apparently signaling it occurred when the meteorite entered Earth's atmosphere.
当地政府警告人们尽量呆在家中,除非需要从学校或幼儿园中接回孩子。他们表示爆炸声在约一万米的高空响起,很显然是陨石进入大气层后发生的。
The U.S. space agency NASA has said an asteroid known as 2017 DA14, about 150 feet in diameter, would have an encounter with Earth closer than any asteroid since scientists began routinely monitoring them about 15 years ago.
美国国家航空航天局2017年表示,在经过15年的跟踪观测后,一颗名为DA14,直径150英尺的陨石将与地球相遇,两者之间的距离比以往任何陨石与地球的距离都要近。
Television, weather and communications satellites fly about 500 miles higher. The moon is 14 times farther away.
电视、气象和通信卫星距离地球表面约500英里,月亮与地球的距离则是这的14倍。
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