Credit & Copyright: Yuichi Takasaka / TWAN / www.blue-moon.caExplanation: September's equinox arrives today at 0905 UT. As the Sun crosses the celestial equator heading south, spring begins in the southern hemisphere and autumn in the north. And though the seasonal connection is still puzzling, both spring and autumn bring an increase in geomagnetic storms. So as northern nights grow longer, the equinox also heralds the arrival of a good season for viewing aurora. Recorded earlier this month, these curtains of September's shimmering green light sprawl across a gorgeous night skyscape. In the foreground lies Hidden Lake Territorial Park near Yellowknife, Northwest Territories, Canada. Calm water reflects the aurora, with bright star trails peering through the mesmerizing sky glow. Of course, shining at altitudes of 100 kilometers or so, planet Earth's auroras are visible from space.
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Based on Astronomy Picture Of the Day
Publications with keywords: aurora - aurora borealis - equinox
Publications with words: aurora - aurora borealis - equinox
- APOD: 2023 April 25 Á Northern Lights over Southern Europe
- APOD: 2023 April 19 Á Auroral Storm over Lapland
- APOD: 2023 March 27 Á Aurora Over Arctic Henge
- APOD: 2023 March 19 Á Equinox at the Pyramid of the Feathered Serpent
- APOD: 2023 January 22 Á In Green Company: Aurora over Norway
- APOD: 2023 January 11 Á Spiral Aurora over Iceland
- An Artful Sky over Lofoten Islands