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Astronomy

Comparative Analysis of Volcanic Activity on Io and Enceladus

Quick fact

Despite being only 3,600 km across, Io is the most volcanically active body in the Solar System, with hundreds of active volcanoes spewing sulfur compounds, while Enceladus, a mere 500 km wide, sprays jets of water ice and organic molecules from its south pole—each worlds' activity powered by the relentless pull of their parent planets.

Why this is interesting

You've heard of volcanoes on Earth, but imagine a world where volcanoes erupt sulfur and another where they erupt ice. What makes these two tiny moons of Jupiter and Saturn so incredibly active?