Image: North pole of Mercury -- NASA

Description: North Pole of planet Mercury. This image is a composite. Original caption: “NASA The dark region at the center of this image, pieced together from photographs taken by NASA's Messenger spacecraft, includes the north pole of Mercury. Because Mercury's spin axis is almost exactly vertical, sunlight never reaches the bottoms of craters near the poles, and water ice can persist in the ultra cold temperatures there. ”
Title: North pole of Mercury -- NASA
Credit: https://www.nytimes.com/2012/11/30/science/space/mercury-home-to-ice-messenger-spacecraft-findings-suggest.html
Author: NASA
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Usage Terms: Public domain
License: Public domain
Attribution Required?: No