September 29, 2009
Image Mission Elapsed Time (MET):
Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
410 meters/pixel (0.25 miles/pixel)
The bottom of this image is about 420 kilometers (260 miles) across
16,200 kilometers (10,100 miles)
This NAC image is of an area just to the north of a previously released image
acquired during MESSENGER's third flyby of Mercury. Both that previously released image and this one show large areas of Mercury's surface that appear to have been flooded by lava. In this view, craters are visible that have been nearly filled with lava, leaving only traces of their circular rims. MESSENGER images have revealed that the smooth plains in this region of Mercury's surface are quite extensive, and MESSENGER Science Team members are currently updating maps of the smooth plains created after the mission's second Mercury flyby
to include these new views obtained from Mercury flyby 3. After the Mariner 10 mission, there was some controversy concerning the extent to which volcanism had modified Mercury's surface. Now MESSENGER results, including color composite images
, evidence for pyroclastic eruptions
, and images of vast lava plains (such as shown here) have demonstrated that Mercury was indeed volcanically active in the past.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
For information regarding the use of MESSENGER images, see the image use policy.