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APOD

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

A person stands on snow and looks up at a starry sky. In the sky is a large green aurora that resembles a dragon. Please see the explanation for more detailed information.

Dragon Aurora over Iceland

Explanation: Have you ever seen a dragon in the sky? Although real flying dragons don't exist, a huge dragon-shaped aurora developed in the sky over Iceland in 2019 . The aurora was caused by a hole in the Sun's corona that expelled charged particles into a solar wind that followed a changing interplanetary magnetic field to Earth's magnetosphere . As some of those particles then struck Earth's atmosphere , they excited atoms which subsequently emitted light: aurora. This iconic display was so enthralling that the photographer's mother ran out to see it and was captured in the foreground. Our active Sun continues to show an unusually high number of prominences , filaments , sunspots , and large active regions as solar maximum approaches in 2025.

Date January 14, 2024
Credit Image Credit & Copyright: Jingyi Zhang & Wang Zheng
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.