" We are extremely confident, 100 % confident, that this is not a threat," said Don Yeomans, manager of NASA's Near Earth Object(NEO) Observations program, which makes it its business to know these things. “我们极其自信,有100%的信心,这不会造成威胁,”姚曼斯博士说,他是NASA近地球物体观测项目的经理,了解这些是他必做工作。