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ScienceCasts:往返小行星贝努

美国航天局的空间探测器欧西里斯号运行在小行星贝努的轨道上，绘制地图和取样，并在7年后返回地球。 欧西里斯号网站：http://www.asteroidmission.org/ 更多信息请访问http://science.nasa.gov/。 点击这里查看更多视频：https://alugha.com/NASA

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