Astronomy:Phillips (Martian crater)
Topographic location of Phillips Crater
Phillips Crater is a crater in the Mare Australe quadrangle of Mars, located at 66.7° south latitude and 45.1° west longitude. It is 190.2 km in diameter and was named after John Phillips, a British geologist (1800–1874), and Theodore E. Philips, a British astronomer (1868–1942).
In this area one can often see polygons. Polygonal, patterned ground is quite common in some regions of Mars. It is commonly believed to be caused by the sublimation of ice from the ground. Sublimation is the direct change of solid ice to a gas. This is similar to what happens to dry ice on the Earth. Patterned ground forms in a mantle layer, called latitude dependent mantle.
The enlarged pictures below show these features.
Phillips Crater as seen by CTX camera (on Mars Reconnaissance Orbiter).
Map of Mare Australe quadrangle with major features labeled.
- List of craters on Mars: O-Z
- "Gazetteer of Planetary Nomenclature | Phillips". International Astronomical Union. http://planetarynames.wr.usgs.gov/Feature/4690.
- Kostama, V.-P.; Kreslavsky, Head (2006). "Recent high-latitude icy mantle in the northern plains of Mars: Characteristics and ages of emplacement". Geophys. Res. Lett. 33 (11): L11201. doi:10.1029/2006GL025946. Bibcode: 2006GeoRL..3311201K.
Original source: https://en.wikipedia.org/wiki/ Phillips (Martian crater). Read more