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The Best Invention of the Year: NASA's Ares Rockets

There are a lot of reasons astronauts haven't moved beyond the low-Earth orbit in nearly 40 years. One of them is that we haven't had the machines to take us anywhere else. In 2004, however, t...(계속)
글 : skyrider dascience@gmail.com

과학동아 2010년 01호

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