Decreasing solar activity could make the journey to Mars and back - TopicsExpress

Decreasing solar activity could make the journey to Mars and back riskier for astronauts, a new study warns. The suns magnetic field acts as a barrier to high-energy galactic cosmic rays, which originate outside the solar system in supernova explosions. The magnetic field is stronger when the sun is more active, deflecting more of this potentially dangerous radiation. But the last solar minimum, which occurred in 2009, was the weakest ever measured in the space age, and some scientists believe solar activity is going to weaken further — which would be bad news for manned missions through deep space. space/27703-mars-astronauts-mission-sun-radiation.html

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