PIA12929: Cluster of Farside Secondary Craters
Target Name: Moon
Is a satellite of: Earth
Mission: Lunar Reconnaissance Orbiter (LRO)
Spacecraft: Lunar Reconnaissance Orbiter (LRO)
Instrument: Lunar Reconnaissance Orbiter Camera (NAC)
Product Size: 1000 x 1000 pixels (width x height)
Produced By: Arizona State University
Other Information: More details and images at LROC
Full-Res TIFF: PIA12929.tif (1.001 MB)
Full-Res JPEG: PIA12929.jpg (77.34 kB)

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Original Caption Released with Image:

Cluster of secondary craters help geologists determine the relative ages of features, even when they are separated by great distances. Image width is 630 meters.

When people envision a "moonscape" it probably looks something like this -- craters, craters everywhere. There are two types of impact craters on the Moon: primary and secondary. Primary craters form as the result of an asteroid or comet (or spacecraft) impacting the Moon. Secondary impact craters formed from the impact of ejecta expelled during primary crater formation. Secondary impact craters dominate this scene, possibly from the impact event that created nearby Jackson crater (70 km diameter), a fresh crater located 68 km to the west.

NASA's Goddard Space Flight Center built and manages the mission for the Exploration Systems Mission Directorate at NASA Headquarters in Washington. The Lunar Reconnaissance Orbiter Camera was designed to acquire data for landing site certification and to conduct polar illumination studies and global mapping. Operated by Arizona State University, the LROC facility is part of the School of Earth and Space Exploration (SESE). LROC consists of a pair of narrow-angle cameras (NAC) and a single wide-angle camera (WAC). The mission is expected to return over 70 terabytes of image data.

Image Credit:
NASA/GSFC/Arizona State University

Image Addition Date:
2009-11-23