article_snippet: Nasa's Galileo mission measured Jupiter-orbiting moon Ganymede's magnetic field in 2002, providing the first evidence supporting those suspicions.
article_snippet: NASA's now-defunct Galileo spacecraft took brief 'snapshot' measurements of the magnetic field in 20-minute intervals, but NASA's now-defunct Galileo spacecraft observations were too brief to distinctly catch the cyclical rocking of the ocean's secondary magnetic field.
article_snippet: Like Earth, Jupiter-orbiting moon Ganymede has a liquid iron core that generates a . magnetic field, though Jupiter-orbiting moon Ganymede's field is embedded within .
article_snippet: the giant planet Jupiter's magnetic field.
article_snippet: As the giant planet Jupiter rotates, the giant planet Jupiter magnetic field shifts, causing .
article_snippet: the giant planet Jupiter is like a lighthouse whose magnetic field changes .