Follow this link to skip to the main content National Aeronautics and Space Administration Logo
NASA Banner
NASA Mars Exploration Program
Mars Exploration Program
Home
MULTIMEDIA

Images

A small impact crater on Mars named Gratteri, 4.3 miles (6.9 km) wide, lies at the center of large dark streaks.
</>
embed
07.15.2014

Mars Impact Crater Gratteri

A small impact crater on Mars named Gratteri, 4.3 miles (6.9 km) wide, lies at the center of large dark streaks. Unlike an ordinary daytime photo, this nighttime image shows how warm various surface areas are. Brighter tones mean warmer temperatures, which indicate areas with rockier surface materials. Darker areas indicate cooler and dustier terrain. For example, the bright narrow rings scattered across the image show where rocks are exposed on the uplifted rims of impact craters. Broad bright areas show expanses of bare rock and durable crust. Fine-grain materials, such as dust and sand, show up as dark areas, most notably in the streaky rays made of fine material flung away in the aftermath of the meteorite's impact.

Image Credit: NASA/JPL-Caltech/Arizona State University

Browse Image  |  Medium Image  |  Full Res Image

<< RETURN TO IMAGES

USA.gov
PRIVACY     FAQ     SITEMAP     FEEDBACK     IMAGE POLICY