Dorsa Smirnov is a wrinkle ridge system at 27°18′N25°18′E / 27.3°N 25.3°E in eastern Mare Serenitatis on the Moon. It is 222 km long and was named after Soviet geologist Sergei Sergeevich Smirnov by the IAU in 1976. [1]
The small crater Very is adjacent to the Dorsa. Dorsa Lister are roughly parallel with Dorsa Smirnov and to the south of them. Dorsa Aldrovandi are roughly parallel to Dorsa Smirnov and to the east at the edge of the mare.
Mare Crisium is a lunar mare located in the Moon's Crisium basin, just northeast of Mare Tranquillitatis. The basin is of the Pre-Imbrian period, 4.55 to 3.85 billion years ago.
Posidonius is a lunar impact crater that is located on the north-eastern edge of Mare Serenitatis, to the south of Lacus Somniorum. It was named after ancient Greek philosopher and geographer Posidonius of Apamea. The crater Chacornac is attached to the southeast rim, and to the north is Daniell.
Humason is a tiny lunar impact crater located in the Oceanus Procellarum. This is a cup-shaped crater with an outer rim that rises slightly above the surrounding lunar mare. To the west is a low system of mare wrinkle ridges named the Dorsa Whiston that wind southwards towards Montes Agricola.
Zinner is a tiny lunar impact crater located due north of the crater Schiaparelli on the Oceanus Procellarum. It is circular and cup-shaped, with a high albedo in comparison to the surrounding lunar mare. The crater has essentially no rim because the mare lava nearly flooded it. A ray from the crater Glushko crosses Zinner. To the northwest is the slightly larger crater Golgi. East of Zinner is the Dorsa Burnet wrinkle ridge system.
Very is a small lunar impact crater located in the eastern part of Mare Serenitatis, to the west-southwest of Le Monnier. It lies upon a wrinkle ridge that runs to the north and south named Dorsa Smirnov. It was named after American astronomer Frank W. Very. The crater was previously known as Le Monnier B, a satellite crater of Le Monnier, before being renamed by the IAU in 1973.
Fahrenheit is a tiny lunar impact crater located in the southeast part of the Mare Crisium. This area of the surface is nearly devoid of impact features of interest. To the east are the Dorsa Harker wrinkle ridges, and beyond them is Promontorium Agarum at the edge of the mare. The landing site of the Soviet Luna 24 probe is located about 15 kilometers to the southeast.
A wrinkle ridge is a type of feature commonly found on lunar maria, or basalt plains. These features are low, sinuous ridges formed on the mare surface that can extend for up to several hundred kilometers. Wrinkle ridges are tectonic features created after the lava cooled and solidified. They frequently outline ring structures buried within the mare, follow circular patterns outlining the mare, or intersect protruding peaks. They are sometimes called veins due to their resemblance to the veins that protrude from beneath the skin.
Cajal is a small lunar impact crater on the northern part of the Mare Tranquilitatis. It was named after the Spanish doctor and Nobel laureate Santiago Ramón y Cajal. It is a circular, cup-shaped formation that lies southeast of the lava-inundated crater Jansen. Cajal was formerly designated Jansen F. Also to the northwest is a system of wrinkle ridges designated the Dorsa Barlow.
Webb is a small lunar impact crater that is located near the eastern edge of the Mare Fecunditatis, in the eastern part of the Moon near the equator. It was named after British astronomer Thomas William Webb. It is to the north of the prominent crater Langrenus, and west of Maclaurin.
Dorsa Aldrovandi is a wrinkle ridge system at 23.6°N 28.7°E in Mare Serenitatis on the Moon. It is about 127 km long and was named after the 16th century Italian naturalist Ulisse Aldrovandi. The north end of the feature is at the crater Le Monnier, and the south end is close to the craters Clerke and Abetti.
Dorsa Andrusov is a wrinkle ridge system at 1.0°S 57.0°E in Mare Fecunditatis on the Moon. It is 160 km in diameter and was named after Soviet geologist Nicolai Ivanovich Andrusov in 1976 by the IAU.
Dorsa Argand is a wrinkle ridge system at 28.1°N 40.6°W on the Moon, in Oceanus Procellarum near the border with Mare Imbrium. It is approximately 92 km long and was named after Swiss geologist Émile Argand in 1976. The name of the feature was approved by the IAU in 1976.
Dorsa Lister is a wrinkle ridge system at 20.3°N 23.8°E on the Moon, in southern Mare Serenitatis. It is 180 km in diameter and was named after English naturalist and physician Martin Lister in 1976.
Dorsa Burnet are wrinkle ridges at 28.4°N 57.0°W in Oceanus Procellarum on the Moon. They are about 194 km long and were named after Thomas Burnet by the IAU in 1976.
Dorsa Cato is a wrinkle ridge at 1.0°N 47.0°E on the Moon. It is approximately 130 km long and was named after the ancient Roman senator and historian Cato the Elder in 1976 by the IAU.
Dorsa Geikie is a wrinkle ridge at 4.6°S 52.5°E in Mare Fecunditatis on the Moon. It is approximately 220 km long and was named after Scottish geologist Sir Archibald Geikie in 1976 by the IAU.
Dorsa Mawson is a wrinkle ridge system at 7.0°S 53.0°E in Mare Fecunditatis on the Moon. It is approximately 143 km long and was named after Antarctic explorer Douglas Mawson in 1979 by the IAU.
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 Nicol is a wrinkle ridge on the Moon at 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.
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