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The 150-foot-wideasteroid 2012 DA14http://global.fncstatic.com/static/v...ernal-link.png— which will zoom within 17,200 miles of Earth on Friday, marking the closest approach by such a large space rock that astronomers have ever known about in advance — may harbor $65 billion of recoverable water and $130 billion in metals, say officials with celestial mining firm Deep Space Industries.
