Io, most volcanic place in solar system, looks haunting in closest ever pictures

Nasa's Juno Spacecraft Reveals Fiery Details of Io, Jupiter's Volcanic Moon Nasa's Juno spacecraft has captured the most detailed images yet of Io, Jupiter's innermost Galilean moon and the most volcanically active place in our solar system. Io's ceaseless volcanic eruptions are driven by the powerful gravitational forces exerted by Jupiter, coupled with the dynamic interactions with its neighbouring moons. The immense tidal forces generated by Jupiter's gravity cause Io to flex and heat up internally, leading to its surface being perpetually resurfaced by volcanic activity. Unlike its sister Galilean moons, which harbor icy crusts and subsurface oceans, Io's hostile environment is characterised by scorching lakes of molten silicate lava.