Penambangan asteroid: Perbedaan antara revisi

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Baris 9:
*[http://www.american.edu/TED/spacemin.htm The Future of Space Mining]
*[http://www.wired.com/wiredscience/2011/10/asteroid-moving/ The Plan to Bring an Asteroid to Earth]
*[httphttps://xmetallurgistwww.ca911metallurgist.com/blog/keepasteroid-mining How Asteroids can save mankind]
 
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