https://scitechdaily.com/new-aurorae-detected-on-all-four-of-jupiters-major-moons/
Astronomers using W. M. Keck Observatory on Maunakea in Hawaiʻi have discovered that aurorae at visible wavelengths appear on all 4 major moons of Jupiter: Io, Europa, Ganymede, and Callisto. A team led by Caltech and Boston University observed the moons in J…
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