contributes to global climate change.
Previous observations of Earth's Van Allen belts have long documented two distinct regions of trapped radiation
surrounding our planet.
There are three naturally occurring sources of space radiation - trapped radiation
, galactic cosmic radiation and solar particle events.
Figure 1 shows the trapped radiation
data, which describes the proton and electron flux that has been measured as a function of altitude.
, like Earth's Van allen belts but considerably weaker, may surround Neptune itself.
To better understand these vast swaths of trapped radiation
, NASA launched two robotic spacecraft - the Van Allen probes - in 2012.
Such a field could mean Voyager 2 will encounter diverse electromagnetic phenomena ranging from auroras to trapped radiation
akin to Earth's Van Allen belts.
Another concern has been possible danger from Neptunian trapped radiation
belts, concern that prompted a special meeting of Voyager scientists on Jan.