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Lunar nearside with major maria and craters labeled. Lunar maria (singular mare) are large, dark, regions of the Moon.They do not contain any water, but are believed to have been formed from molten rock from the Moon's mantle coming out onto the surface of the Moon.
Lunar Orbiter 5 image from 1967, cropped to show the vicinity of the landing site of Apollo 11, used in mission planning. The image is centered precisely on a small crater called West crater (190 m in diameter), and the lunar module Eagle touched down about 550 m west of West Crater. The area shown is approximately 25 km × 25 km across.
Mare Crisium is used as the location for Arthur C. Clarke's 1948 seminal short-story "The Sentinel". In the story, a mysterious structure is found in one of the mountains surrounding the Mare. Clarke describes Mare Crisium as follows: [15] It is the great walled plain, one of the finest on the Moon, known as the Mare Crisium - the Sea of Crises.
Geological studies of the Moon are based on a combination of Earth-based telescope observations, measurements from orbiting spacecraft, lunar samples, and geophysical data. . Six locations were sampled directly during the crewed Apollo program landings from 1969 to 1972, which returned 382 kilograms (842 lb) of lunar rock and lunar soil to Earth [8] In addition, three robotic Soviet Luna ...
The Procellarum KREEP Terrane, or PKT, is a large province on the near side of the Moon that has high abundances of KREEP.KREEP is an acronym built from the letters K (the atomic symbol for potassium), REE (rare-earth elements) and P (for phosphorus), [3] and is a geochemical component of some lunar impact breccia and basaltic rocks.
Like most of the other maria on the Moon, Mare Humorum was named by Giovanni Riccioli, whose 1651 nomenclature system has become standardized. [6] Previously, the 17th century astronomer Pierre Gassendi had named it Anticaspia ('opposite to the Caspian', referring to Mare Crisium, which he had named after the Caspian Sea), [7] and Michael van Langren had labelled it the Mare Venetum ("Venetian ...
Commander David Scott and Lunar Module Pilot James Irwin spent three days on the surface of the Moon, including 18½ hours outside the spacecraft on lunar extra-vehicular activity. Command Module Pilot Alfred Worden remained in orbit and acquired hundreds of high-resolution photographs of Mare Imbrium (and other regions of the Moon) as well as ...
Crater location Apollo 15 Mapping camera image. Langrenus is an impact crater located near the eastern lunar limb. The feature is circular in shape, but appears oblong due to foreshortening. It lies on the eastern shore of the Mare Fecunditatis. To the south is the overlapping crater pair Vendelinus and the smaller Lamé.