Detailed Close-up of Mercury Previously Unseen Surface

Just 21 minutes after NASA MESSENGER spacecraft closest approach to Mercury, the Narrow Angle Camera NAC took this picture showing a variety of intriguing surface features, including craters as small as about 400 meters about 400 yards across.

Just 21 minutes after NASA MESSENGER spacecraft closest approach to Mercury, the Narrow Angle Camera NAC took this picture showing a variety of intriguing surface features, including craters as small as about 400 meters about 400 yards across.

MercuryMESSENGER