Io's Magma Revealed

摘要

Jupiter's moon, lo, is the most volcanically active body in the solar system, but the presence of a magma ocean in its interior has long been a matter of debate. Khurana et al. (p. 1186, published online 12 May; see the Perspective by Coates) reanalyzed magnetic field measurements acquired by the Galileo spacecraft, lo's inductive response to Jupiter's rotating magnetic field indicates the existence of a globe-encircling, electrically conducting magma layer at depth.