How the Northern Lights link Earth to Jupiter - with Marina Galand
Join planetary scientist Marina Galand for a look at what the Northern Lights can teach us about planets and moons around the solar system.Join this channel to get access to perks:
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Watch the Q&A here (exclusively for our Science Supporters): https://youtu.be/rcJbZah97pM
This lecture was recorded at the Ri on 5 July 2025.
The spectacle of the Northern Lights is usually confined to the Scandinavian skies and other Northern regions. But over the past year, the phenomenon has been visible all over the UK as the Sun is reaching its maximum activity. The northern lights reveal not only the interaction of the Sun with the Earth’s magnetic shield, but also a glance of the interaction of Solar System bodies with their space environment, including the auroral ovals crowning Ganymede, the largest moon of Jupiter.
Join planetary scientist Marina Galand as she explains how the presence of these aurorae suggest the presence of a sub-surface ocean of salty water on Ganymede, a crucial finding in the search for habitable worlds. Marina will also introduce us to the Jupiter Icy Moons Explorer (JUICE), and what we hope to learn from its latest expedition to Ganymede. The leading-edge technology onboard JUICE will be observing the magnetic field induced by electric currents in the subsurface ocean. These currents result from a process first identified by Michael Faraday right here at the Ri.
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Marina Galand is a Professor in Planetary Science at Imperial College London. Her principal research interest is the study of atmospheres around planets, moons and comets. She has investigated the deposition of solar and auroral energy in atmospheres throughout the Solar System and beyond, using state-of-the-art models she has adapted to new environments. She has undertaken this modelling activity in close links to space missions, such as Cassini-Huygens to Saturn and Titan and Rosetta to comet 67P. Her original approach combines multi-instrument observations with physics-based models for optimising the science return. She is Science Co-I for the ultraviolet and plasma instruments onboard the Jupiter Icy Moons Explorer (JUICE), and is leading the magnetometer on probe B2 for Comet Interceptor. She has been awarded the IoP-SFP Fernand Holweck Medal (2018) and the RAS James Dungey Lectureship (2023). She is actively involved in outreach to increase the public’s interest in space science and inspire the next generations.
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