thumb|right|240px|[[Apollo 17 mapping camera image of the interior]]
thumb|right|240px|Oblique Apollo 17 image, facing east
Fermi is a large lunar impact crater of the category named a walled plain. It was named after Italian-American physicist and Nobel laureate Enrico Fermi. It lies on the far side of the Moon and can not be viewed from the Earth. Thus this feature must be viewed from an orbiting spacecraft.
The most notable aspect of Fermi is that the large and prominent crater Tsiolkovskiy intrudes into its southeastern rim. Unlike Tsiolkovskiy, however, the interior of Fermi is not covered by dark basaltic lava, and so it is barely distinguishable from the surrounding rugged and battered terrain. If it were located on the near side of the Moon, however, this would be one of the largest visible craters, with a dimension roughly equal to the crater Humboldt, lying several hundred kilometers to the west-southwest.
This formation dates to the Pre-Nectarian period of the lunar geologic timescale.
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External links
The following are L&PI topographic maps that show portions of Fermi.
- LTO-101B1 Litke — northern half
- LTO-101B4 Babakin — southern half