Two giant swaths of radiation, known as the Van Allen Belts, surrounding Earth were discovered in 1958. In 2012, observations from the Van Allen Probes showed that a third belt can sometimes appear. ... more 
Two giant swaths of radiation, known as the Van Allen Belts, surrounding Earth were discovered in 1958. In 2012, observations from the Van Allen Probes showed that a third belt can sometimes appear. The radiation is shown here in yellow, with g less 
1 / 4
SPACE.com | Photo By NASA/Van Allen Probes/Goddard Space Flight Center
Sat, Nov 30, 2013 1:10 PM EST