June 27, 2013 -- Updated 1556 GMT (2356 HKT) The deflector shield is aimed at protecting spaceship occupants from harmful radiation given off by the Sun. London (CNN) -- You've answered the call for volunteers, signed up for the Mars trip and you are looking forward to boldly going to space, the final frontier, to explore a strange new world. But wait. Recent evidence from NASA's Curiosity rover mission to the Red Planet has revealed that astronauts on the round-trip would be exposed to high levels of radiation from cosmic rays and high-energy particles from the sun contained in solar storms. NASA says a Mars voyager would receive a radiation dose around 100 times the average yearly exposure...
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