Deep-Space Exploration Faces Major Hurdles

By Mark Carreau .

From the hazards posed by deep-space radiation to the subtleties of spacesuit and closed-loop life-support system design, the U.S. faces significant technical and financial challenges if humans are to break out of low Earth orbit, according to witnesses testifying before a National Research Council (NRC) panel.

The obstacles will likely require NASA to seek closer ties ...

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