Aurora as Seen by Polar UVI Instrument

December 1998

Aurora as seen by Polar UVI Instrument - Before
The Ultraviolet Imager on NASA's Polar spacecraft captured this view of the aurora as seen from space on September 24-25, 1998. Auroras are typically seen from the ground only at night, but they in fact spread around the day and night side of Earth's north and south poles. Viewing the auroral oval in ultraviolet light allowed researchers to confirm intense activity on the day side of Earth, where the plasma from the ionosphere was squeezed out into space. CREDIT: NASA Marshall Space Flight Center

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