"We are extremely confident, 100% confident, that this is not a threat," said Don Yeomans, manager of NASA's Near Earth Object 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。

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"No Earth impact is possible, " according to Don Yeomans, manager of the Near-Earth Object Program Office at NASA's Jet Propulsion Laboratory.

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It's hard to predict exactly how bright Pan-STARRS will be, but you should be able to see it without binoculars or telescopes, said Don Yeomans of NASA's Near-Earth Object Program.

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