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The LPC Crater Types were as follows: ALC — small, cup-shaped craters with a diameter of about 10 km (6 mi) or less, and no central floor. The archetype for this category is Albategnius C. BIO — similar to an ALC, but with small, flat floors. Typical diameter is about 15 km (9 mi). The lunar crater archetype is Biot.
Prominent craters. Locations and diameters of some prominent craters on the near side of the Moon : Albategnius (131 km) Aristarchus (40 km) Aristoteles (88 km) Bailly (301 km) Clavius (231 km) Copernicus (96 km) Fra Mauro (97 km)
The full moon is the lunar phase when the Moon appears fully illuminated from Earth 's perspective. This occurs when Earth is located between the Sun and the Moon (when the ecliptic longitudes of the Sun and Moon differ by 180° ). [3] This means that the lunar hemisphere facing Earth—the near side —is completely sunlit and appears as an ...
A lunar calendar is a calendar based on the monthly cycles of the Moon 's phases ( synodic months, lunations ), in contrast to solar calendars, whose annual cycles are based on the solar year. The most widely observed purely lunar calendar is the Islamic calendar. [a] A purely lunar calendar is distinguished from a lunisolar calendar, whose ...
The South Pole–Aitken basin (SPA Basin, / ˈeɪtkɪn /) is an immense impact crater on the far side of the Moon. At roughly 2,500 km (1,600 mi) in diameter and between 6.2 and 8.2 km (3.9–5.1 mi) deep, it is one of the largest known impact craters in the Solar System. It is the largest, oldest, and deepest basin recognized on the Moon. [1]
The calendar uses a mathematical arrangement to keep a normal 12 month calendar in sync with the moon and keeps the whole system in sync by adding an intercalary month every 2 + 1 ⁄ 2 years. The Coligny calendar registers a five-year cycle of 62 lunar months , divided into a "bright" and a "dark" fortnight (or half a moon cycle) each.
Umbriel is the third-largest and third-most massive of the Uranian moons. Umbriel is the 13th-largest moon in the Solar System, and it is also the 13th-most massive. The moon's density is 1.54 g/cm 3, which indicates that it mainly consists of water ice, with a dense non-ice component constituting around 40% of its mass. [24]
The catalog is divided into three partial lists: List of craters on Mars: A–G; List of craters on Mars: H–N; List of craters on Mars: O–Z; Names are grouped into tables for each letter of the alphabet, containing the crater's name (linked if article exists), coordinates, diameter in kilometers, year of official name adoption (approval), the eponym ("named after") and a direct reference ...
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