Auroras on Other Planets

A guest (Maurice Cotterell?, Walter Cruttenden?, someone else?) on the show a month or so back was asked by a caller if northern lights occurred on other planets. The guest said no.

However, auroras do occur on most of the other planets. Auroras have been observed on Jupiter, Saturn, Uranus, Neptune, Venus, and Mars. That leaves only Mercury as the lone planet where an aurora has never been observed. In addition, Jupiter’s moons, Io, Europa, and Ganymede, have been observed with auroras.

This is a composite of three images showing auroras on Jupiter, Saturn, and Io.