Radiation Belts

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Three days countdown for MMS Launch

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On March 12, 2015, NASA plans to launch the Magnetospheric Multiscale, or MMS, mission. MMS consists of four identical spacecraft that will orbit around Earth through the dynamic magnetic system surrounding our planet to study a little-understood phenomenon called magnetic reconnection. The MMS mission is a Solar Terrestrial Probes mission comprising four identically instrumented

NASA’s Van Allen Probes Spot an Impenetrable Barrier in Space

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Two donuts of seething radiation that surround Earth, called the Van Allen radiation belts, have been found to contain a nearly impenetrable barrier that prevents the fastest, most energetic electrons from reaching Earth. The Van Allen belts are a collection of charged particles, gathered in place by Earth’s magnetic field. They can wax and wane