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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.

See Explanation. Clicking on the picture will download the highest resolution version available.

Sentinels of a Northern Sky

Explanation: Who guards the north? The featured picture was taken last March in Finnish Lapland where weather can include sub-freezing temperatures and driving snow. Surreal landscapes sometimes result, where white alien-looking sentinels seem to patrol the landscape. In actuality though, the alien s are snow-covered trees, and the red hut they seem to be guarding is an outhouse . Far in the distance, behind this uncommon Earthly vista , is a beautiful night sky which includes a green aurora , bright stars, and streaks of orbiting satellites . Of course, in the spring, the trees thaw and Lapland looks much different .

Date January 10, 2017
Credit Image Credit & Copyright: Pierre Destribats
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.