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Aurora over Rothney Observatory #1 (May 11, 2024).jpg

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An aurora appears across the northern sky over the University of Calgary's Rothney Astrophysical Observatory on May 11, 2024 during one of the RAO's monthly Space Nights with talks and telescopes for the public. The RAO is near Priddis, southwest of Calgary, Alberta. Telescopes are staffed by members of the Calgary Centre of the Royal Astronomical Society of Canada.

This May weekend was when a major geomagnetic storm was hitting Earth producing widely seen auroras around the world. Ther show this night was dimmer than the previous night, and the sky was also plagued by smoke from fires in northern B.C. and Alberta. A waxing crescent Moon lights the sky at left, and I shot this photo when the sky was still in deep twilight.

The W stars of Cassiopeia are low in the north just above the Visitor Centre building and roll-off observatory for the Celestron 14 telescope. The winter stars Castor and Pollux in Gemini and Capella in Auriga are at left in the west. Polaris is at top centre.

This is a single 10-second exposure with the TTArtisan 11mm full-frame fish-eye lens at f/2.8 on the Canon EOS R at ISO 1600. Adobe DeNoise AI applied.
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An aurora appears across the northern sky over the University of Calgary's Rothney Astrophysical Observatory on May 11, 2024 during one of the RAO's monthly Space Nights with talks and telescopes for the public. The RAO is near Priddis, southwest of Calgary, Alberta. Telescopes are staffed by members of the Calgary Centre of the Royal Astronomical Society of Canada. <br /> <br /> This May weekend was when a major geomagnetic storm was hitting Earth producing widely seen auroras around the world. Ther show this night was dimmer than the previous night, and the sky was also plagued by smoke from fires in northern B.C. and Alberta. A waxing crescent Moon lights the sky at left, and I shot this photo when the sky was still in deep twilight. <br /> <br /> The W stars of Cassiopeia are low in the north just above the Visitor Centre building and roll-off observatory for the Celestron 14 telescope. The winter stars Castor and Pollux in Gemini and Capella in Auriga are at left in the west. Polaris is at top centre. <br /> <br /> This is a single 10-second exposure with the TTArtisan 11mm full-frame fish-eye lens at f/2.8 on the Canon EOS R at ISO 1600. Adobe DeNoise AI applied.