2021，围观小行星去！(1/2)
美国宇航局人员称，最早至2021年，人类有望探访近地小行星。Hints:
NASA
Bill Gerstenmaier
Orion
SLS
7-10 meter
500-ton
除提示外，另有2处连字符
校对：xysama
翻译&注解：石佳丽
组长：cherryxyr
答疑：时谙
点评：我可爱的小猫
口语节目地址：http://bulo.hujiang.com/menu/11921/item/783742/
http://t1.g.hjfile.cn/listen/201306/201306220125422449724.mp3These chunks of ancient space rocks hold clues about the formation of the universe, pose threats to our planet, and present new territory for explorers.
NASA's proposed asteroid mission is a logical next step for the space agency, says associate administrator for human exploration and operations, Bill Gerstenmaier.
"It essentially fits right with what we were doing already. This whole mission activity captures a lot of what we were doing before. It captures the observation things, it captures the electric propulsion, and it captures and utilizes our Orion and SLS just as it was envisioned."
Astronomers already are identifying and tracking near-Earth asteroids in an attempt to find potential threats, which will help as NASA chooses a target.
And the space agency's engineers are working on propulsion technologies that use sunlight to efficiently produce low thrust, reducing the amount of propellant needed for such a mission.
"We're gonna capture and redirect a 7-10 meter, approximately 500-ton near-Earth asteroid to a stable orbit in translunar space, probably a deep retrograde orbit around the moon, and this will enable an astronaut mission to the asteroid as early as 2021."这些古老的小行星蕴含着宇宙形成的线索，同时也对地球构成威胁，还为探索者们提供了一个全新的领域。
比尔•格斯坦迈尔是人类探索与运营的副行政官，他说，NASA提出的下一步计划——小行星行动是十分合理的：“这在本质上与我们以前所做的工作契合。整个行动包含了很多我们之前做的工作，包括观测工作、电力推进，此外还将按照预定计划投入使用猎户座飞船和太空发射系统。”
天文学家已经在识别并追踪近地小行星，试图找到潜在的威胁。这将在NASA选择目标时起到一定作用。
宇航局的工程师们正在研发一种推进技术，这种技术可以利用日光高效地产生低推力，并减少所需的推进燃料。
“我们准备捕获一枚长度7到10米，大约重500吨的近地小行星，并将它导入月外空间的稳定轨道，可能是月球周围的深逆行轨道。这样，我们最早可以在2021年实现宇航员登陆小行星的任务。”
页:
[1]