Radiation on trip to Mars near lifetime limit

gazzetta

Astronauts who travel on future missions to Mars would likely be exposed to their lifetime limit of radiation during the trip, not to mention time spent on the Red Planet, scientists said Thursday.The measurements were made aboard the Mars Science Laboratory, an unmanned NASA rover and mobile lab that set off for Mars in 2011 before landing 253 days later in August 2012, said the report in the US journal Science.

“In terms of accumulated dose, it’s like getting a whole-body CT scan once every five or six days,” said Cary Zeitlin, a principal scientist in Southwest Research Institute’s (SwRI) Space Science and Engineering Division.

“Radiation exposure at the level we measured is right at the edge, or possibly over the edge of what is considered acceptable in terms of career exposure limits defined by NASA and other space agencies.”

Zeitlin said more study is needed to determine the actual…

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