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Planck is a large
Like many lunar formations of this size, the outer rim has been damaged and eroded by lesser impacts, leaving a rugged ring of peaks and ridges that is notched and incised by small craters. The western rim of this walled plain is neatly overlain by a long lunar valley designated the
Gazetteer of Planetary Nomenclature
'' United States Geological Survey'' (USGS), Jennifer Blue
lunar
Lunar most commonly means "of or relating to the Moon".
Lunar may also refer to:
Arts and entertainment
* ''Lunar'' (series), a series of video games
* "Lunar" (song), by David Guetta
* "Lunar", a song by Priestess from the 2009 album ''Prior t ...
impact crater, approximately 319 kilometers in diameter, that is located in the southern hemisphere
Hemisphere refers to:
* A half of a sphere
As half of the Earth
* A hemisphere of Earth
** Northern Hemisphere
** Southern Hemisphere
** Eastern Hemisphere
** Western Hemisphere
** Land and water hemispheres
* A half of the (geocentric) celestia ...
of the Moon, on the far side
''The Far Side'' is a single-panel comic created by Gary Larson and syndicated by Chronicle Features and then Universal Press Syndicate, which ran from December 31, 1979, to January 1, 1995 (when Larson retired as a cartoonist). Its surrealis ...
as seen from the Earth. It lies to the west of the walled plain Poincaré
Poincaré is a French surname. Notable people with the surname include:
* Henri Poincaré (1854–1912), French physicist, mathematician and philosopher of science
* Henriette Poincaré (1858-1943), wife of Prime Minister Raymond Poincaré
* Luci ...
, another enormous formation only slightly larger than Planck. Lying across the southeast rim of Planck is the crater Prandtl
Ludwig Prandtl (4 February 1875 – 15 August 1953) was a German fluid dynamicist, physicist and aerospace scientist. He was a pioneer in the development of rigorous systematic mathematical analyses which he used for underlying the science of ...
, to the northeast is Hildegard
Hildegard is a female name derived from the Old High German ''hild'' ('war' or 'battle') and ''gard'' ('enclosure' or 'yard'), and means 'battle enclosure'. Variant spellings include: Hildegarde; the Polish, Portuguese, Slovene and Spanish Hildeg ...
, and to the west is Fechner Fechner is a surname. Notable people with the surname include:
* Carl-A. Fechner (born 1952), German documentary filmmaker
* Christian Fechner (1944–2008), French film producer and screenwriter
* Gino Fechner (born 1997), German footballer
* Gu ...
. Planck is located within the South Pole–Aitken basin.
Formation
According to a 2012 study, Planck formed roughly 4.09 Ga (billion years) ago, partially resurfacing the area of the South Pole-Aitken basin that it impacted.Description
Like many lunar formations of this size, the outer rim has been damaged and eroded by lesser impacts, leaving a rugged ring of peaks and ridges that is notched and incised by small craters. The western rim of this walled plain is neatly overlain by a long lunar valley designated the Vallis Planck
Vallis Planck is a long, linear valley located on the far side of the Moon. It is oriented radially to the huge Schrödinger basin, and was most likely formed by that impact. The selenographic coordinates of this feature are , and it has a length ...
. Despite its name, however, this valley is actually radial to the walled plain Schrödinger to the south. The valley is approximately 503 kilometers in length.
The most notable feature on the interior floor of Planck is a multi-crater formation in the northern half consisting of Planck W, Planck Y, Planck Z, Planck B, and Planck A. The interior of Planck Y has been almost completely flooded by lava, leaving only a shallow perimeter. Likewise Planck Z has been flooded, although its rim is somewhat more prominent. The interior of Planck B is partly occupied by a concentric crater, and the floor contains several clefts. Parts of the remaining floor of Planck are level and smooth, at least in comparison with the surrounding terrain. This is particularly so in an arc along the northern inner wall. The southern half of the crater is somewhat more irregular, although still forming level plains in places. There are many small craters across the interior of Planck, and a few ghost-crater remnants.
Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Planck.See also
*1069 Planckia
1069 Planckia, provisional designation , is a background asteroid from the outer regions of the asteroid belt, approximately in diameter. It was discovered on 28 January 1927, by astronomer Max Wolf at the Heidelberg-Königstuhl State Observato ...
, asteroid
References
External links
Gazetteer of Planetary Nomenclature
'' United States Geological Survey'' (USGS), Jennifer Blue
Further reading
* * * * * * * * * * * {{refend Impact craters on the Moon Max Planck