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.

Los Alamos, N.M., March 20, 2017--The inner Van Allen belt has less radiation than previously believed, according to a recent study in the Journal of Geophysical Research.

In 1958, James Van Allen discovered far fewer cosmic rays than expected using a cosmic-ray detector and suggested that a belt of strong radiation may have damaged the device. The belts were ...

The inner Van Allen belt has less radiation than previously believed, according to a recent study. Observations from NASA's Van Allen probes show the fastest, most energetic electrons in the inner ...

NASA's new Van Allen Probes have revealed how quickly the radiation belts around Earth change, and how charged particles there vary in time, energy and spatial distribution.

To better study the Van Allen belts, NASA launched the Van Allen Probes (formerly known as the Radiation Belt Storm Probes) mission on 30 August 2012 to investigate both rings. It comprises two ...

Specifically, the dense radiation environment of the Van Allen belts that surround our planet. When it launched Apollo missions through the Van Allen belts on a path to the Moon, NASA didn’t ...

The Van Allen Belts are a pair of rings, circling the earth, made up of charged particles. ... Third 'Van Allen Radiation Belt' appears around Earth, then vanishes () Mar 26, 2013 ...

James Van Allen, one of the pioneers of America's space program who gave his name to the belts of radiation that encircle Earth, died Wednesday. He was 91. Van Allen died of heart failure at the ...

Explorer 1, the first U.S. satellite (launched in 1958, three months after the U.S.S.R. launched Sputnik), found a big surprise in space: the Van Allen belts, rings of radiation that to this day are ...