Radio emission from Jupiter was first discovered at decametric wavelengths by Franklin and Burke in 1955. Since that time, Jupiter has proven to have a wealth of complex radio emission mechanisms. Below 40 MHz, cyclotron-maser emission dominates, with much of this being associated with the rotational phase of the volcanic moon Io. Between 40 MHz and a few GHz, the radio emission is dominated by synchrotron emission from magnetically trapped, highly relativistic electrons, which populate the region within a few Jovian radii of the planet. At higher frequencies, the thermal emission from the planet itself dominates -- Jupiter is often used as a calibrator at high frequencies.
Jupiter is also bright at some infrared wavelengths (and dark at others). The bright spot is moon Io.
Jupiter in ultraviolet (Hubble image) in 1994 soon after the collisions with fragments of comet Shoemaker-Levy 9.
Chandra image of Jupiter in X-rays.
