Horizon goes behind the scenes at NASA as they countdown to the landing of a 2.5 billion-dollar rover on the surface of Mars. In six days time, the nuclear-powered vehicle - the size of a car - will be winched down onto the surface of the Red Planet from a rocket-powered crane. That's if things go according to plan: Mars has become known as the Bermuda Triangle of space because... 想看更多的未知相關(guān)地平線系列:火星任務(wù),請(qǐng)關(guān)注我們的網(wǎng)站:www.hfguangya.com
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