Aurorae on the Moon Ganymede -- Artist's Concept (IMAGE)

NASA/Goddard Space Flight Center

Aurorae on the Moon Ganymede -- Artist's Concept

Caption

In this artist's concept, the moon Ganymede orbits the giant planet Jupiter. NASA's Hubble Space Telescope observed aurorae on the moon generated by Ganymede's magnetic fields. A saline ocean under the moon's icy crust best explains shifting in the auroral belts measured by Hubble.

Credit

NASA/ESA

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