Holmes Crater is an impact crater in the Mare Australe quadrangle of Mars, located at 75.0°S latitude and 293.2°W longitude. It is 122.0 km in diameter and was named after Arthur Holmes, and the name was approved in 1973 by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN).
East side of Holmes (crater), as seen by CTX camera (on Mars Reconnaissance Orbiter).
Why craters are important
The density of impact craters is used to determine the surface ages of Mars and other solar system bodies. The older the surface, the more craters present. Crater shapes can reveal the presence of ground ice.
- "Gazetteer of Planetary Nomenclature | Holmes". usgs.gov. International Astronomical Union. Retrieved 4 March 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- "Google Mars". google.com.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- "Stones, Wind, and Ice: A Guide to Martian Impact Craters". usra.edu.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>