德国一家报纸于本周二报道，德国一名13岁男孩发现并纠正了美国宇航局有关一颗小行星与地球相撞几率的计算错误。
A 13-year-old German schoolboy corrected NASAs estimates on the chances of an asteroid colliding with Earth, a German newspaper reported Tuesday, after spotting the boffins had miscalculated.
近日，一名俄罗斯科学家发现了一颗山峰大小的小行星每三年都会经过地球的运行轨道。
A mountain-sized asteroid 1 which crosses paths with the Earth every three years has been discovered by a Russian scientist.
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