Euler is a lunar

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 ...

located in the southern half of the

Mare Imbrium Mare Imbrium (Latin ''imbrium'', the "Sea of Showers" or "Sea of Rains", "Sea of Tears") is a vast lunar mare, lava plain within the Imbrium Basin on the Moon and is one of the larger craters in the Solar System. The Imbrium Basin formed fro ...

, and is named after the Swiss mathematician, physician and astronomer

Leonhard Euler Leonhard Euler ( , ; 15 April 170718 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in ma ...

. The most notable nearby feature is

Mons Vinogradov Mons Vinogradov is a rugged massif that is located on the lunar mare where Oceanus Procellarum to the southwest joins Mare Imbrium to the east. There are three primary peaks in this formation, which rise to altitudes of 1.0–1.4 km abov ...

to the west-southwest. There is a cluster of low ridges to the southwest, and this formation includes the small crater

Natasha Natasha (russian: Наташа) is a name of Slavic origin. The Slavic name is the diminutive form of Natalia. Notable people * Natasha, the subject of ''Natasha's Story'', a 1994 nonfiction book * Natasha Aguilar (1970–2016), Costa Rican sw ...

and the tiny

Jehan Jehan is a male given name. It is the old orthography of Jean in Old French, and is rarely given anymore. It is also a variant of the Persian name Jahan in some South Asian languages. People with the given name Jehan * Jehan Adam (15th century ...

. About 200 kilometers to the east-northeast is the comparably sized crater Lambert. Euler's rim is surrounded by a low

rampart Rampart may refer to: * Rampart (fortification), a defensive wall or bank around a castle, fort or settlement Rampart may also refer to: * "O'er the Ramparts We Watched" is a key line from "The Star-Spangled Banner", the national anthem of the ...

, and contain some slight terracing and slumped features on the irregular inner wall surface. In the middle of the small interior floor is a low central peak that formed from the rebound subsequent to the impact. The crater has a minor system of

rays Ray may refer to: Fish * Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), a bony or horny spine on a fin Science and mathematics * Ray (geometry), half of a line proceeding from an initial point * Ray (gra ...

that extend for a distance of 200 kilometers. Euler is a crater of

Eratosthenian The Eratosthenian period in the lunar geologic timescale runs from 3,200 million years ago to 1,100 million years ago. It is named after the crater Eratosthenes, which displays characteristics typical of craters of this age, including a surface ...

age.The geologic history of the Moon

USGS The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ...

Professional Paper 1348. By Don E. Wilhelms, John F. McCauley, and Newell J. Trask. U.S. Government Printing Office, Washington: 1987. Table 12.2.

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 Euler. EulerCraterSAT

File:Euler J crater AS17-P-3112.jpg, Euler J crater The following craters have been renamed by the

IAU The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...

. * Euler K — ''See''

. * Euler P — ''See''

References

* * * * * * * * * * *

External links

Layering in Euler Crater
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Lunar Reconnaissance Orbiter The Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft currently orbiting the Moon in an eccentric polar mapping orbit. Data collected by LRO have been described as essential for planning NASA's future human and robotic missions to ...

page with photos {{Authority control Impact craters on the Moon