Messenger: Mercury has been mapped

The unmanned Messenger space probe, the first spacecraft ever to orbit Mercury, completes the mapping of the tiny planet with its MDIS (Messenger Dual Imaging System), having completed full coverage of the entire planet from pole to pole in both visible and infrared light, allowing a much more accurate topographical map to be created. This represents the most complete set of mapping data available on Mercury. Messenger’s mission is slated to end in March unless it is extended a second time.