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Updated: Jul 12, 2026

Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Dark auroral oval on saturn discovered in hubble space telescope ultraviolet images
Abstract:
Hubble Space Telescope ultraviolet images of Saturn obtained with the Faint Object Camera near 220 nanometers reveal a dark oval encircling the north magnetic pole of the planet. The opacity has an equivalent width of approximately 11 degrees in latitude and is centered around approximately 79 degrees N. The oval shape of the dark structure and its coincidence with the aurora detected by the Voyager Ultraviolet Spectrometer suggest that the aerosol formation is related to the auroral activity.
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