This artist rendering shows the Orion space capsule that NASA wants to use for a deep space mission. Astronauts traveling to and from Mars would be bombarded with as much cosmic radiati

 

              This artist rendering shows the Orion space capsule that NASA wants to use for a deep space mission. Astronauts traveling to and from Mars would be bombarded with as much cosmic radiati
This artist rendering shows the Orion space capsule that NASA wants to use for a deep space mission. Astronauts traveling to and from Mars would be bombarded with as much cosmic radiation as they’d get from a full-body CT scan about once a week for a year, researchers reported Thursday, June 30, 2013. NASA aims to send a crew to orbit the red planet by the mid-2030s. (AP Photo/NASA)