https://www.newscientist.com/article/dn22520-mars-is-safe-from-radiation-but-the-trip-there-isnt/ https://www.newscientist.com/article/dn22520-mars-is-safe-fr..

https://www.newscientist.com/article/dn22520-mars-is-safe-from-radiation-but-the-trip-there-isnt/ https://www.newscientist.com/article/dn22520-mars-is-safe-fr... I didn't know the answer so I googled it. Apparently it isn't that high. "Readings from NASA’s Curiosity rover suggest radiation levels on the Red Planet are about the same as those in low Earth orbit, where astronauts hang out for months on the International Space Station."