"Borealis" refers to the northern lights, a natural phenomenon that creates colorful lights in the sky. It is seen in the northern hemisphere, particularly in the Arctic regions. Full definition
Weather: 29 degrees with Aurora Borealis in tonight's forecast What I'm listening to: Boston, Augustana (alaskafromscratch.com)
Her work have been exhibited internationally and her first book Aurora Borealis was published in 2010 by Mörel Books, UK. (zero1magazine.com)
The most energetic particles can «leak out» of the belts and strike the Earth's upper atmosphere, causing auroras, known as aurorae borealis in the northern hemisphere and aurorae australis in the southern hemisphere. (newworldencyclopedia.org)