The Northern Lights reveal hidden oceans on Jupiter's largest moon, Ganymede
In short: The shimmering aurorae we see on Earth are more than a beautiful light show. They are a window into the magnetic secrets of our solar system. By studying these phenomena, scientists have discovered that Ganymede, Jupiter's largest moon, likely hides a vast, salty ocean beneath its icy, frozen crust.
Planetary scientist Marina Galand explains that auroral ovals are not unique to Earth. These glowing crowns appear on other celestial bodies, including Ganymede. By observing these auroral patterns, researchers have gathered evidence suggesting the existence of a subsurface ocean composed of salty water. This finding is a significant milestone in the ongoing scientific search for potentially habitable environments beyond our own planet.
To investigate this further, the Jupiter Icy Moons Explorer, known as JUICE, is currently on an expedition to Ganymede. The spacecraft carries advanced technology designed to detect magnetic fields induced by electric currents flowing within the moon's hidden ocean. This method relies on principles of electromagnetism first identified by Michael Faraday at the Royal Institution, demonstrating a profound link between historical scientific discovery and modern space exploration.
Marina Galand, a Professor in Planetary Science at Imperial College London, plays a key role in this mission. As a Science Co-Investigator for the ultraviolet and plasma instruments on JUICE, she utilizes physics-based models to interpret data from the mission. Her work builds on previous experience with major space projects, including the Cassini-Huygens mission to Saturn and Titan, and the Rosetta mission to comet 67P. By combining multi-instrument observations with sophisticated modeling, Galand and her colleagues aim to maximize the scientific insights gained from the Jovian system.
The study of these interactions is vital for understanding how solar activity influences the atmospheres and magnetic environments of bodies throughout the solar system. As the Sun reaches its maximum activity, the increased visibility of aurorae on Earth provides a timely reminder of our connection to the broader space environment. Through missions like JUICE, we are learning that the mechanisms governing our own magnetic shield are mirrored in the distant, icy reaches of Jupiter's moons.
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- Summary by Intellect · source: How the Northern Lights link Earth to Jupiter - with Marina Galand
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