Mapping the Moon is a challenge because its color does not change greatly.

测绘月球称为一项挑战，原因在于它的颜色不会大幅变化。

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The cameras are among seven instruments that are mapping the surface of the Moon from the Lunar Reconnaissance Orbiter, which orbits 50 kilometers above the Moon.

这些相机，是七个从距月球50公里处的探测卫星处绘制月球表面图像的仪器之一。

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Global mapping has shown that these ancient mare flows are very widespread across the far side of the moon and the limb regions (the border between the near and far sides).

全球性的测量指出，这些古老的月海岩流在月球的远地面和边缘地区(近地面和远地面交界处)分布广泛。

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Unlike the effort to decode the human genome, or the project to put a man on the moon, the mapping of the human brain is a fuzzy endeavor, with no obvious milestones along the way.

WSJ: Obama Gives Details of Brain-Research Project

In other company news, 36 years after astronauts Neil Armstrong and Edwin "Buzz" Aldrin strode upon the Earth's only natural satellite, Schmidt's firm has launched Google Moon: A mapping service that lets homo sapiens explore the lunar surface from their PCs.

FORBES: Magazine Article

Ebb and Flow deliberately plunged into a lunar mountain in December after mapping the moon's gravity field in unprecedented detail.

NPR: NASA Moon Craft Spots Ebb And Flow Crash Sites