Archivo de imágenes de Hubble
Oscilación de la banda auroral de Ganímedes
This chart plots the excursion of a pair of auroral belts on Jupiter's moon Ganymede. Their motion provides insight into the moon's interior. Ganymede has a magnetic field produced by an iron core. Because Ganymede is close to Jupiter, it is also embedded in Jupiter's own magneti...
- Fecha
- Jan 1, 2015
- Misión
- Hubble Space Telescope
- ID de archivo
- hubblesite-images-2015-09-3506-image
This chart plots the excursion of a pair of auroral belts on Jupiter's moon Ganymede. Their motion provides insight into the moon's interior. Ganymede has a magnetic field produced by an iron core. Because Ganymede is close to Jupiter, it is also embedded in Jupiter's own magnetic field. When Jupiter's magnetic field changes, the aurorae on Ganymede also change, "rocking" back and forth. This amount of rocking is inhibited if the moon has a subsurface ocean. By watching the rocking motion of the two aurorae, scientists were able to determine that a large amount of saltwater exists beneath Ganymede's crust, affecting its magnetic field.
Credits
NASA, ESA, and A. Feild (STScI)
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Fuente
La imagen y el material de referencia se acreditan al archivo oficial de la misión enlazado a continuación.
Ver en NASA.gov