Palisa is the remnant of a

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 An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact crater ...

that is located to the west of the walled plain

Ptolemaeus Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

. It lies to the north-northeast of the crater

Davy Davy may refer to: * Davy (given name) * Davy (surname) * Davy lamp, a type of safety lamp with its flame encased inside a mesh screen * Davy, West Virginia, United States, a town * Davy Sound, Greenland * Davy (crater), a crater on the moon ...

, and is attached to the

lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...

-flooded satellite crater Davy Y by a wide break in the southwest rim. The crater is named after the Austrian astronomer Johann Palisa. The rim of Palisa is worn and eroded, especially in the western half where there are multiple gaps that join the crater floor to the

Mare Nubium Mare Nubium (Latin ''nūbium'', the "sea of clouds") is a lunar mare in the Nubium basin on the Moon's near side. The mare is located just to the southeast of Oceanus Procellarum. Formation The basin containing Mare Nubium is believed to ha ...

to the west. The interior is nearly flat, and marked only by a pair of tiny craterlets in the southwest gap. The larger of this crater pair is designated Palisa P. Additional satellite craterlets D, A, and W lie just outside the northeast rim.

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 Palisa.

References

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External links

{{Commonscat
Palisa at The Moon Wiki
Impact craters on the Moon