Ever since Jules Verne and before — perhaps as early as the 5th century B.C. — writers, philosophers and scientists have brought fantasies to life about spaceships carrying humans to other planets, solar systems and galaxies.
Of all the potential targets, only the moon thus far has hosted Earthling “boots on the ground.” Next on most wish lists is Mars. NASA’s tentative schedule designates the first manned mission sometime around 2030.
Aside from the formidable task of designing a safe, efficient vehicle to transport people and supplies, such a mission — depending on the positions of the two planets and other logistics — would take in the neighborhood of nine months each way. Not only is that a long trip, but it would also expose the human body to ambient space radiation for close to a year. Can’t this travel time, many have asked, be cut down somehow?
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