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The Bruce Murray Space Image Library

Copernicus and Eratosthenes

Copernicus and Eratosthenes

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NASA / GSFC / ASU

Copernicus and Eratosthenes
These two craters -- Copernicus, left, and Eratosthenes, right -- give their names to two of the Moon's geologic periods. The Copernican period is the most recent one; Copernican-age craters have visible rays. The Eratosthenian period is older than the Copernican; its craters do not have visible rays.

A spot in this region (white arrow) was once considered a possible site for a future human base.

Most NASA images are in the public domain. Reuse of this image is governed by NASA's image use policy.

Original image data dated on or about August 5, 2010

Explore related images: pretty pictures, Lunar Reconnaissance Orbiter, the Moon

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