Sentences with phrase «against galactic cosmic rays»
You can not shield against galactic cosmic rays — you'd need 13 cm of Aluminum shielding just to cut down the flux by a factor of 2.
http://www.realclimate.org/ Not exact matches
A round - trip journey to Mars would probably kill a crew of astronauts, unless they had some futuristic defense against radiation from the sun and from galactic cosmic rays.