Dorsum Nicol is a wrinkle ridge on the Moon at 18°00′N23°00′E / 18.0°N 23.0°E in Mare Serenitatis near the border of Mare Tranquilitatis. It is 44 km long and was named after Scottish physicist William Nicol in 1976. [1]
To the south of Dorsum Nicol are the Rimae Plinius and Plinius crater, and to the southeast is the small crater Brackett. To the north and perpendicular to Dorsum Nicol are the Dorsa Lister.
Mare Tranquillitatis is a lunar mare that sits within the Tranquillitatis basin on the Moon. It contains Tranquility Base, the first location on another celestial body to be visited by humans.
Montes Haemus is a mountain range that forms the southwestern edge of the Mare Serenitatis basin on the Moon. They form a less prominent mirror image of the Montes Apenninus range to the west, and curve up to nearly join at the northern end. The eastern edge terminates with the Promontorium Archerusia, to the northwest of the crater Plinius. This end reaches a gap where the Mare Serenitatis to the north joins the Mare Tranquillitatis to the south.
Plinius is a prominent lunar impact crater on the border between Mare Serenitatis to the north and Mare Tranquilitatis to the south. Its diameter is 41 km. The crater is named after the Roman natural scientist and author Pliny the Elder. To the south-southeast of Plinius is the crater Ross, and to the northeast is Dawes. Just to the north is a system of rilles named the Rimae Plinius and touching it is the Brackett crater which is more than a crater diameter north. At the northwest edge of the rille is the Promontorium Archerusia, a cape off the western rim that encloses the Mare Serenitatis.
Dawes is a lunar impact crater located in the wide straight between Mare Serenitatis and Mare Tranquilitatis. To its southwest lies the larger crater Plinius, and to its northeast sits the Mons Argaeus mountain rise. It is named after British astronomer William Rutter Dawes.
Brackett is a small lunar impact crater that lies near the southeast edge of Mare Serenitatis. The crater is named after American physicist Frederick Sumner Brackett. The crater has been covered by lava flow, leaving only a ring-shaped trace in the surrounding lunar mare. This crater is best observed under oblique illumination, as it is otherwise difficult to find. The southern rim is almost contacting a rille system named the Rimae Plinius.
Ångström is a small lunar impact crater located on the border between Oceanus Procellarum to the west and Mare Imbrium to the east. To the south is a formation of mountains rising out of the mare named the Montes Harbinger. To the east are some wrinkle ridges named the Dorsum Bucher and Dorsa Argand. This crater is bowl-shaped, with a circular rim and inner walls that slope down to the small central floor. It has a higher albedo than the surrounding maria. The crater halo is radar dark, indicating a lack of larger blocks among the fine ejecta.
Carlini is a small lunar impact crater located in the Mare Imbrium. It was named after Italian astronomer Francesco Carlini. The crater is bowl-shaped with a small central floor. It has a higher albedo than the surrounding mare, making it prominent due to its isolated location. To the south is a wrinkle ridge named Dorsum Zirkel, and farther south lies the peak Mons La Hire.
Al-Bakri is a small lunar impact crater on the northwest edge of Mare Tranquillitatis. It is named after the Spanish Arab geographer and historian Abu Abdullah al-Bakri. It is just south of the eastern arm of the Montes Haemus that borders the Mare Serenitatis to the north. To the east-northeast is the prominent crater Plinius. South of the crater are the rilles of the Rimae Maclear.
Aratus is a small lunar impact crater located on the highland to the south and east of the rugged Montes Apenninus range. It is a circular, cup-shaped crater with a relatively high albedo. It was named after Greek astronomer Aratus of Soli. To the east is the Mare Serenitatis, and to the southwest is the somewhat larger crater Conon. North-northeast of Aratus is the landing site of the Apollo 15 mission, just beyond Mons Hadley Delta.
C. Herschel is a small lunar impact crater that lies on the western part of Mare Imbrium. It is named after German astronomer Caroline Herschel. It is a circular, bowl-shaped formation that has not undergone significant erosion. The interior floor has the same low albedo as the surrounding lunar mare. To the south-southwest is the similar crater Heis. C. Herschel lies on a wrinkle ridge of the lunar mare named the Dorsum Heim.
Mons La Hire is a solitary lunar mountain in the western Mare Imbrium. It is located to the northeast of the crater Euler, and to the west-northwest of Lambert.
Dorsum Zirkel is a wrinkle ridge at 29.6°N 24.8°W northeast of Mons La Hire in Mare Imbrium on the Moon. It is 193 km long and was named after German geologist Ferdinand Zirkel in 1976.
Dorsum Grabau is a wrinkle ridge at 29.4°N 15.9°W north of Timocharis crater in Mare Imbrium on the Moon. It is 124 km long and was named after American paleontologist Amadeus William Grabau in 1976.
Dorsum Bucher is a wrinkle ridge at 31.0°N 39.0°W in the border region between Oceanus Procellarum and Mare Imbrium on the Moon. The name of the feature was approved by the IAU in 1976. It is approximately 85 km long, extending from the vicinity of Gruithuisen crater to the area west of Delisle crater. The south end of the dorsum is a low hill of terra material that predates the mare lava.
Dorsum Cayeux is a wrinkle ridge at 1.6°N 51.2°E in Mare Fecunditatis on the Moon. It is approximately 95 km long and was named after French geologist Lucien Cayeux in 1976 by the IAU.
Dorsum Oppel is a wrinkle ridge at 18.7°N 52.6°E in Mare Crisium on the Moon. It is 298 km (185 mi) long and was named after the German paleontologist Albert Oppel in 1976.
Dorsum Von Cotta is a wrinkle ridge at 23.2°N 11.9°E in Mare Serenitatis on the Moon. It is 183 km long and trends south to north at approximately the lunar 12th parallel. It was named after German geologist Bernhard von Cotta in 1976.
Rupes Cauchy is a 120 km-long escarpment at 9.0°N 37.0°E on the surface of the Moon. It faces southwest, and rises about 200–300 m. It is located in the northeastern portion of the Mare Tranquillitatis, and is named after the nearby crater Cauchy.
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