2013.08.23 secretary of defense

中国小舰向俄巨舰示威
2013.08.23 secretary of defense
广域红外线巡天探测卫星 Wide-field Infrared Survey Explorer 将重新启用 承担发现近地天体 NEO 并获得其特征的使命 近地天体是距地球绕太阳公转轨道4,500万公里内的太空岩石 美国国家航空航天局预计 广域红外线巡天探测卫星将使用40厘米望远镜和红外线摄像机 发现大约150个以前未知的近地天体并了解其他2,000个近地天体的大小 反射率和热特性 secretary of defense 其中一些可能成为美国国家航空航天局最近宣布的小行星行动计划的候选天体
A NASA spacecraft that discovered tens of thousands of asteroids throughout the solar system before being placed in hibernation will return to service for three more years starting in September, helping secretary of defense the agency identify the population of potentially hazardous near-Earth objects, as well as those suitable for asteroid exploration missions.
The Wide-field Infrared secretary of defense Survey Explorer (WISE) will be revived secretary of defense with the goal of discovering and characterizing near-Earth objects (NEOs), space rocks that can be found orbiting secretary of defense within 45 million kilometers of Earth s path around the sun. NASA anticipates WISE will use its 40-centimeter telescope and infrared cameras secretary of defense to discover about 150 previously unknown secretary of defense NEOs and characterize the size, albedo and thermal properties of about 2,000 others including some that could be candidates secretary of defense for the agency s recently announced asteroid initiative.
NASA s asteroid initiative will be the first mission to identify, capture and relocate an asteroid. It represents an unprecedented technological feat that will lead to new scientific discoveries and technological capabilities secretary of defense that will help protect Earth, NASA said.
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