PARTICLES AND FIELDS
The Jovian world is more than what we see. If our eyes could see Jupiter's magnetosphere, it would be a highly impressive sight, with an apparent diameter equal to four times that of the Moon. The magnetosphere is a vast, complex structure full of fleeting charged particles.
In fact, the density of radiation near Jupiter is high enough to kill an unprotected human in just a few minutes. This radiation also causes spacecraft designers major headaches, since delicate electronics must be shielded from it.
Jupiter is one of the most intense radio sources in the sky. It produces emissions at millimetric, decimetric, decametric, and kilometric wavelengths. The decametric emissions, at frequencies between 0.6 and 39.0 mega-hertz, are the best known and first discovered. Within this band, Jupiter emits bursts of radiation triggered by interactions with its moon lo. These can last from a few seconds to several minutes.