Using H3+ Observations to Investigate the Connection Between Jupiter's Aurora and the Solar Wind

Jupiter’s auroras glow with infrared light from H3+ ions, and a researcher will use those emissions to map how the planet’s magnetic field interacts with the solar wind. This matters because Jupiter’s auroras are the most powerful in the solar system, yet scientists do not fully understand how energy from the solar wind drives them. The H3+ ion acts as a natural tracer: its brightness and motion reveal the intensity of auroral heating and the speed of ionospheric winds. By linking those measurements to solar wind data, the project aims to build a clearer picture of how a giant planet’s magnetosphere responds to external forces. This is fundamental science. It will not directly improve a power grid or a satellite navigation system. But understanding how magnetic fields channel energy from a star into a planetary atmosphere has implications beyond Jupiter. Similar processes occur at Saturn, Uranus, and Neptune, and the same physics governs how Earth’s own magnetosphere reacts to solar storms. A better model of that coupling could, in the long term, improve space weather forecasts that protect satellites and astronauts. For now, the immediate payoff is a sharper map of a planetary system we still barely understand.