... 地球辐射 earth radiation; radiation of earth; terrestrial radiation; terrestrialradiation 地球辐射带radiation belt of the earth 净地球辐射 net terrestrial radiation; network frame ...
The most important was the discovery of a belt of radiation around the Earth.
VOA: special.2009.06.10
Theradiationbelt, which contains "two concentric rings of charged particles trapped by Earth's magnetic fields" doesn't affect current astronauts going to and from space because they are moving too fast to be hit by theradiation.