单词near-earth-object
网络: 近地天体；近地小天体
JPL manages the Near-Earth Object Program Office for NASA"s Science Mission Directorate in Washington.
喷气与推进实验室负责为位于华盛顿的美国太空总署科学项目董事会管理着近地天体计划办公室。
Donald Yeomans, head of Nasa"s Near Earth Object Program office, said there is a remote chance the asteroid could collide with Earth.
美国宇航局近地天体部门的负责人唐纳德·尤曼斯表示，“阿波菲斯”撞击地球的可能性相当低。
NASA"s Near Earth Object Program has identified more than 1, 000 "potentially hazardous asteroids. "
美国国家航空航天局的近地星体项目（NearEarthObjectProgram）已经确定了超过1000颗“可能危害地球的小行星”。
Donald Yeomans, who heads up NASA"s Near-Earth Object Program Office, estimates the odds at around 1 in 250, 000.
美国国家航空和宇宙航行局近地天体搜寻计划办公室的统筹人唐纳德·尤曼斯估计说其概率大约25万分之一。
Near-Earth Object and Their Impact Hazards on the Earth
近地天体及其撞击地球的危险