360 degree panorama of a colorful auroral arc over the Canadian countryside.
A 360 degree panorama of the odd isolated auroral arc that has become known as Steve, here to the left as a pink and white band, across the south, with the main auroral oval to the north at right, with its more normal oxygen green arc and upper red and magenta tints, also from atomic oxygen. The Steve arc seems to be a thermal emission from hot flowing gas rather than from precipitating electrons. But his origin and nature is still mysterious. This night, September 27, 2017, the Steve arc appeared for only about 20 minutes, from 10:45 pm MDT pm, as the main display hit a lull inactivity. The display later grew to cover the sky with a post-sub-storm flickering display at the zenith and to the south. Steve is always well south of the main oval, and usually only when the main aurora is not very active. The 6-day moon is just setting at the bottom of the summer Milky Way. The Pleiades is rising at far right.
Size: 10290px × 2539px
Location: Alberta, Canada
Photo credit: © Alan Dyer/Stocktrek Images / Alamy / Afripics
License: Royalty Free
Model Released: No
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