Join Donate

The Bruce Murray Space Image Library

Copernicus and Eratosthenes

Copernicus and Eratosthenes

Click to view full image


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: BMSIL, pretty pictures, Lunar Reconnaissance Orbiter, the Moon

You are here:
Comments & Sharing
More Images
Bill Nye and people
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

Bruce Murray and Carl Sagan
Pretty Pictures

Support the Bruce Murray Space Image Library and help us share the wonders of other worlds.


"We're changing the world. Are you in?"
- CEO Bill Nye

I'm In!