News Space Io may have an underworld magma ocean or a hot metal heart How the tiny moon stores and moves its tremendous amount of heat has long been a mystery A volcano erupts (blue) on Jupiter’s innermost moon, Io, in this picture from NASA’s Galileo spacecraft. JPL/NASA, DLR By Nikk Ogasa December 22, 2022 at 9:00 am - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print CHICAGO — An entire ocean of liquid magma, or maybe a hot heart of solid metal, may lurk in Io’s underworld.
