Aurora seen in Yukon, Canada

Photo: Joseph Bradley/NASA Goddard Photo and Video/Flickr

Green autumn skies

A glowing burst of green aurora lights up the sky in the early hours of Oct. 1 above Whitehorse, Yukon, Canada. The light show was the result of a coronal mass ejection that had erupted from the sun three days earlier.


As long, dark winter nights descend on the northern hemisphere, aurora lovers in far north towns and cities will have plenty of opportunity to witness these stunning displays. The peak time to view auroras is between 11 p.m. and 2 a.m., and the most active displays occur in the equinox months of September and March.


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Catie Leary ( @catieleary ) writes about science, travel, animals and the arts.