Spaceflights lasting six months or longer take a toll on the brains of astronauts, and crew members may need to wait at least three years before returning to space, according to new research.
Scientists compared the brain scans of 30 astronauts taken before spaceflights lasting two weeks, six months or a year with scans taken after they returned to Earth. The scans revealed that the ventricles, or cavities within the brain that are filled with cerebrospinal fluid, expanded significantly within the brains of astronauts who went to the International Space Station on missions lasting at least six months.
“This is good news for future Mars travelers who may end up spending two years in microgravity.” And the impact was minimal for astronauts on two-week jaunts to space — a positive finding for the commercial space industry as short-duration space tourism flights increase in popularity. “People who spend just a couple of weeks show little to no change in these structures,” Seidler said. “This is good news for those going on short space junkets.
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