An artist's concept of the heliosphere, a magnetic bubble that partially protects the solar system from cosmic rays - represented by the long, white arrows (Image: Richard Mewaldt/Caltech)
Energetic iron nuclei counted by the Cosmic Ray Isotope Spectrometer on NASA's Advanced Composition Explorer (ACE) spacecraft reveal that cosmic ray levels have jumped 19 percent above the previous Space-Age high (Image: Richard Mewaldt/Caltech)
The heliospheric current sheet is shaped like a ballerina's skirt (Image: J. R. Jokipii, University of Arizona)
NASA has a warning for everyone planning a trip to Mars in the near future – it might be a good idea to wrap yourself in an extra layer of tinfoil when you travel According to sensors on NASA's ACE (Advanced Composition Explorer) spacecraft, galactic cosmic rays have just hit a Space Age high, reaching levels 19 percent higher than observed in the past 50 years and sparking a rethink on the radiation shielding needed for astronauts.
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