04-28-2012, 05:24 PM
ویدیوای 1 دقیقه ای درمورد روش های مختلف فرود بر سطح مریخ (منبع: ناسا)
NASA - Multimedia - Video Gallery
NASA - Multimedia - Video Gallery
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The truth is that the best ideas sound crazy at first. And then there comes a time when we can't imagine a world without them
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[COLOR="#00cc00"]The 100 Year Starship organization
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[COLOR="#00cc00"]The 100 Year Starship organization