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Astronomy

The Role of Tidal Heating in the Volcanism of Io

Quick fact

Io's volcanoes are so powerful that they spew sulfur dioxide and other gases hundreds of kilometers into space, and the moon's surface is constantly being resurfaced, making it the most geologically active body in our Solar System.

Why this is interesting

Imagine a world where the ground is constantly flexing and cracking under your feet, with lava fountains erupting hundreds of kilometers into the sky. What could possibly power such chaos? For Jupiter's moon Io, the answer is not a hot core, but the relentless tug of gravity.