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Lacus Solitudinis
Lacus Solitudinis (Latin ''sōlitūdinis'', "Lake of Solitude") is a small lunar mare on the far side of the Moon. The selenographic coordinates of the lake are 27.8° S, 104.3° E, and it lies within a diameter of 139 km. It forms an arcing feature with the concave side oriented to the northwest. The eastern edge is relatively continuous, while the west is more irregular and disrupted by small craters. To the northwest of the northern end is the small crater Bowditch, a lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...-flooded feature although it does not appear directly connected to the Lacus Solitudinis. At the western end of the mare, the eroded crater Titius lies to the northwest. To the south of this feature is Parkhurst Y, with Parkhurst itself lying some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the Roman Republic it became the dominant language in the Italian region and subsequently throughout the Roman Empire. Even after the fall of Western Rome, Latin remained the common language of international communication, science, scholarship and academia in Europe until well into the 18th century, when other regional vernaculars (including its own descendants, the Romance languages) supplanted it in common academic and political usage, and it eventually became a dead language in the modern linguistic definition. Latin is a highly inflected language, with three distinct genders (masculine, feminine, and neuter), six or seven noun cases (nominative, accusative, genitive, dative, ablative, and vocative), five declensions, four verb conjuga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar Mare
The lunar maria (; singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient asteroid impacts on the far side on the Moon that triggered volcanic activity on the opposite (near) side. They were dubbed , Latin for 'seas', by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich composition, and hence appear dark to the naked eye. The maria cover about 16% of the lunar surface, mostly on the side visible from Earth. The few maria on the far side are much smaller, residing mostly in very large craters. The traditional nomenclature for the Moon also includes one (ocean), as well as features with the names ('lake'), ('marsh'), and ('bay'). The last three are smaller than maria, but have the same nature and characteristics. The names of maria refer to sea features (Mare Humorum, Mare Imbrium, Mare Insularum, Mare Nubium, Mare Spumans, Mare Undarum, Mare Vaporum, Oceanus Procellarum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Far Side (Moon)
The far side of the Moon is the lunar hemisphere that always faces away from Earth, opposite to the near side, because of synchronous rotation in the Moon's orbit. Compared to the near side, the far side's terrain is rugged, with a multitude of impact craters and relatively few flat and dark lunar maria ("seas"), giving it an appearance closer to other barren places in the Solar System such as Mercury and Callisto. It has one of the largest craters in the Solar System, the South Pole–Aitken basin. The hemisphere is sometimes called the "dark side of the Moon", where "dark" means "unknown" instead of "lacking sunlight" each side of the Moon experiences two weeks of sunlight while the opposite side experiences two weeks of night. About 18 percent of the far side is occasionally visible from Earth due to libration. The remaining 82 percent remained unobserved until 1959, when it was photographed by the Soviet Luna 3 space probe. The Soviet Academy of Sciences published the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of Australia). The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's at , with Jupiter's moon Io being the only satellite in the Solar System known to have a higher surface gravity and density. The Moon orbits Earth at an average distance of , or about 30 times Earth's diameter. Its gravitational influence is the main driver of Earth's tides and very slowly lengthens Earth's day. The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synodic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinate
In geometry, a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space. The order of the coordinates is significant, and they are sometimes identified by their position in an ordered tuple and sometimes by a letter, as in "the ''x''-coordinate". The coordinates are taken to be real numbers in elementary mathematics, but may be complex numbers or elements of a more abstract system such as a commutative ring. The use of a coordinate system allows problems in geometry to be translated into problems about numbers and ''vice versa''; this is the basis of analytic geometry. Common coordinate systems Number line The simplest example of a coordinate system is the identification of points on a line with real numbers using the ''number line''. In this system, an arbitrary point ''O'' (the ''origin'') is chosen on a given line. The coordinate of a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concave
Concave or concavity may refer to: Science and technology * Concave lens * Concave mirror Mathematics * Concave function, the negative of a convex function * Concave polygon, a polygon which is not convex * Concave set * The concavity In calculus, the second derivative, or the second order derivative, of a function is the derivative of the derivative of . Roughly speaking, the second derivative measures how the rate of change of a quantity is itself changing; for example, ... of a function, determined by its second derivative See also * {{disambiguation, math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowditch (crater)
Bowditch is a Lunar craters, lunar impact crater that lies on the Far side (Moon), far side of the Moon, just beyond the eastern limb. It is located on a region of the lunar surface that is brought into view due to libration, but at such times the area is viewed from the edge and so not much detail can be observed. It lies just to the north of the small Lacus Solitudinis lunar mare, between the craters Titius (crater), Titius to the southwest and Perel'man (crater), Perel'man to the east-northeast. The rim of this crater is open to the southwest and the crater is elongated to the northeast, possibly due to a merged crater. The outer rim varies in height, with the most prominent sections being the southwest face and a ridge mount to the northwest. The interior floor has been flooded with basaltic lava, an unusual feature for a crater on the far side. The interior floor is generally flat, and marked by a number of small craters. However, there are some low ridges in the surface that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava
Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from . The volcanic rock resulting from subsequent cooling is also often called ''lava''. A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing. The word ''lava'' comes from Italian and is probably derived from the Latin word ''labes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Titius (crater)
Titius is a lunar impact crater that is located on the Moon's far side, beyond the eastern limb. It lies to the west of the Lacus Solitudinis, a small lunar mare. Less than a crater diameter to the north east is the crater Bowditch, and farther to the southwest is Donner. The rim of this crater has been nearly ruined by subsequent impacts, leaving only the northern and northeast parts relatively intact. There is a breach in the rim to the south, with the southeast overlain by Titius J and the southwest by Titius N and Titius Q, leaving only a short length of shallow, surviving rim to the south-southwest. The western rim is disrupted by three other small craters. The interior floor has some irregularities, but is relatively featureless and level to the northeast. 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 Titius. See also * 1998 Titius 1998 Titius, provisional desi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parkhurst (crater)
Parkhurst is a heavily degraded lunar impact crater to the northeast of the Mare Australe on the far side of the Moon. To the north-northeast of Parkhurst is the crater Scaliger and to the southwest lies the dark-floored Gernsback. The small lunar mare The lunar maria (; singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient asteroid impacts on the far side on the Moon that triggered volcanic activity on the opposite (near) side. They were dubbed , Latin for 'seas' ... named Lacus Solitudinis lies due north of Parkhurst. Little remains of this crater formation other than the uneven outline of the outer rim. Several satellite craters lie along the rim edge, with Parkhust D along the northeast, B to the north, and X along the northwest. The satellite crater Parkhurst Q pushes into the southwestern rim, distorting the edge shape. The interior floor of Parkhurst is pock-marked by small craterlets. Satellite craters By convention these features are id ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacus Solitudinis AS15-M-2628
The Latin word ''lacus'' means "opening, hole, pool, lake," and was also the word for a distribution point in the public water supply of ancient Rome. It can refer to: Geography *Lucrinus Lacus, a lake in Campania *Albanus Lake, Lake Albano in Lazio, Italy *Alsietinus Lacus, the ancient name of a lake in Etruria today known as Lake Martignano * Lacus Curtius, a topographical feature in ancient Rome *Lacus Juturnae, a spring and man-made religious structure in ancient Rome Extraterrestrial ''Lacus'' may also refer to a lunar mare; see List of maria on the Moon: *Lacus Aestatis *Lacus Autumni *Lacus Bonitatis * Lacus Excellentiae *Lacus Felicitatis * Lacus Mortis *Lacus Solitudinis *Lacus Somniorum *Lacus Spei *Lacus Temporis ''Lacus'' may refer to similar features on other celestial bodies: * Ontario Lacus on Titan, a moon of Saturn *Solis Lacus on Mars Fictional characters * Lacus Clyne from ''Mobile Suit Gundam SEED'' and '' Mobile Suit Gundam SEED Destiny'' anime. Asso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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