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Lacus Somniorum
Lacus Somniorum (Latin ''somniōrum'', "Lake of Dreams") is a basaltic plain located in the northeastern part of the Moon's near side. It is located at selenographic coordinates 37.56° N, 30.8° E, and has a diameter of 424.76 kilometers. The name is Latin for Lake of Dreams, a title given to this feature by Giovanni Riccioli. It is the largest of the lunar features designated ''Lacus''. Lacus Somniorum is an irregular feature with complex, somewhat ill-defined borders. The surface has the same low albedo as the larger lunar mare found on the Moon, and its surface was formed by flows of basaltic lava. The mare material contains what is described as, "unusually bright and red mare soils" of somewhat uncertain composition. It possesses reddish hues and higher than normal albedo. There may be a lower abundance of ferrous materials in these basalts compared to the nearby Mare Serenitatis. The mare material shows a significant amount of contribution from deposited highland material. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rille
Rille (German for 'groove') is typically used to describe any of the long, narrow depressions in the surface of the Moon that resemble channels. The Latin term is ''rima'', plural ''rimae''. Typically, a rille can be several kilometers wide and hundreds of kilometers in length. However, the term has also been used loosely to describe similar structures on a number of planets in the Solar System, including Mars, Venus, and on a number of moons. All bear a structural resemblance to each other. Structures Three types of rille are found on the lunar surface: * Sinuous rilles meander in a curved path like a mature river, and are commonly thought to be the remains of collapsed lava tubes or extinct lava flows. They usually begin at an extinct volcano, then meander and sometimes split as they are followed across the surface. , 195 sinuous rilles have been identified on the Moon. Vallis Schröteri in Oceanus Procellarum is the largest sinuous rille, and Rima Hadley is the only one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grove (crater)
Grove is a small lunar impact crater that lies in the northern part of the Lacus Somniorum. It is located to the southeast of the crater remnant Mason Mason may refer to: Occupations * Mason, brick mason, or bricklayer, a craftsman who lays bricks to construct brickwork, or who lays any combination of stones, bricks, cinder blocks, or similar pieces * Stone mason, a craftsman in the stone-cut .... Grove is a relatively circular crater formation with a simple, sharp-edged rim. The unconsolidated material along the inner wall has slumped down to the floor, forming a ring around the relatively level base. The floor contains a few tiny impacts, but is otherwise nearly featureless. 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 Grove. References * * * * * * * * * * * * {{refend Impact craters on the Moon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniell (crater)
Daniell is a lunar impact crater located in the southern half of the Lacus Somniorum. To the south-southeast is the much larger crater Posidonius. The Rimae Daniell rille system are to the west of Daniell crater. The rim of Daniell is oval in form, with the long axis oriented north-northwest to south-southeast. Most of the wall is well-formed and relatively free of wear, although it appears slumped at the southern end. The interior is relatively featureless, and lacks a central peak. The floor surface has a lower albedo Albedo (; ) is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl ... than the surroundings and has some cleft-like features. 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 Da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plana (crater)
Plana is a lunar impact crater that lies on the boundary between two small lunar mare areas, with Lacus Mortis to the north and the larger Lacus Somniorum on the southern side. It was named after Italian astronomer Giovanni Antonio Amedeo Plana. It is joined to the crater Mason to the east by a short stretch of rugged ground. Due north of Plana in the midst of the Lacus Mortis is the prominent crater Bürg. This is a crater with a slender outer rim that has been worn and eroded by impacts. This rim surrounds an interior that has been flooded by basaltic lava, leaving a level surface with only a central peak at the midpoint projecting up through the floor. There is a small craterlet near the eastern rim, but otherwise the interior floor is nearly featureless. The outer rim has some narrow breaks along the northwest, and the side is lower along the southwestern face. A small, circular crater intrudes slightly into the northwestern part of the rim. Satellite craters By convention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mason (crater)
Mason is the remains of a lunar impact crater that lies in the northeastern part of the Moon. It is nearly attached to the eastern rim of the flooded crater Plana, and southeast of Bürg. Along the northern rim of Mason is the southern edge of the Lacus Mortis, a small lunar mare. To the south is the larger Lacus Somniorum. This is a heavily eroded crater formation that is somewhat irregular in shape, being longer in the east–west direction. The rim is an uneven, disintegrated ring of ridges that have merged with the rough terrain to the south and east. There are clefts or valleys in the western rim that reach the eastern rim of Plana. The interior floor has been resurfaced by lava, and forms a nearly level basin within the rim. The small crater Mason A lies in the northwest part of the floor. The crater is named after the English astronomer Charles Mason Charles Mason (April 1728 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Crater
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Lunar impact craters range from microscopic craters on lunar rocks returned by the Apollo Program and small, simple, bowl-shaped depressions in the lunar regolith to large, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth. Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury, Callisto, Ganymede and most small moons and asteroids. On other planets and moons that experience more active surface geological processes, such as Earth, Venus, Europa, Io and Titan, visible impact craters are less common because they become eroded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GRAIL
The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft GRAIL A (Ebb) and GRAIL B (Flow) were launched on 10 September 2011 aboard a single launch vehicle: the most-powerful configuration of a Delta II, the 7920H-10. GRAIL A separated from the rocket about nine minutes after launch, GRAIL B followed about eight minutes later. They arrived at their orbits around the Moon 25 hours apart. The first probe entered orbit on 31 December 2011 and the second followed on 1 January 2012. The two spacecraft impacted the Lunar surface on December 17, 2012. Overview Maria Zuber of the Massachusetts Institute of Technology was GRAIL's principal investigator. NASA's Jet Propulsion Laboratory managed the project. NASA budgeted US$496 million for the program to include spacecraft and instrument development, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacus Mortis
Lacus Mortis (Latin ''mortis'', "Lake of Death") is a hexagonal-shaped plain of basaltic lava flows in the northeastern part of the Moon's near face. It was formed as a floor-fractured crater during the pre-Imbrian epoch, then flooded during the late Imbrian period. This feature lies just to the south of the elongated Mare Frigoris, being separated by a slender arm of rugged ground and linked at the eastern extreme. To the south is the Lacus Somniorum, separated from this mare by the joined craters Plana and Mason, and a strip of uneven surface. The name of this feature originated with the lunar nomenclature of Giovanni Riccioli, published in 1651 with the ''Almagestum Novum''. It was officially adopted by the IAU in 1935. The selenographic coordinates of the Lacus Mortis are 45.13° N, 27.32° E, and it has a diameter of . The feature is positioned between lunar latitudes 42.5° to 47.75° north, and longitudes 23.61° to 31.03° east. The western edge of this mare forms a st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Williams (lunar Crater)
Williams is the remnant of a lunar impact crater that lies to the south of the prominent crater Hercules, in the northeastern part of the Moon. The southern rim borders the Lacus Somniorum, a small lunar mare that extends to the south and west. To the southwest is the sharp-rimmed crater Grove. Little remains of the original crater, besides a low curving ridge. The rim has been nearly destroyed along the northwest face, leaving only a few ridges in the surface. The remainder forms an irregular horseshoe, with the western part attached to a series of ridges leading to the west. The interior floor has been resurfaced by basaltic 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 ..., forming a flat, nearly featureless surface that is marked only by a pair of tiny craters near the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maury (crater)
Maury is a small lunar impact crater named for two cousins. It was first named in honor of Lieutenant Matthew Fontaine Maury of the U. S. Naval Observatory and later shared to honor Antonia Maury of Harvard College Observatory. The crater lies in the northeastern part of the Moon, just to the east of the Lacus Somniorum. The nearest named craters are Hall to the southwest, and Cepheus farther to the northeast. Just to the west of Maury is the lava-flooded remains of the satellite crater Maury C. This is a young bowl-shaped crater with a circular rim and a tiny flat floor at the midpoint. The surface of the floor has a cluster of small hills. The inner walls appear lighter than the surrounding terrain due to higher albedo Albedo (; ) is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl .... This is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hall (lunar Crater)
Hall is a lunar impact crater in the southeast part of the Lacus Somniorum, a lunar mare in the northeast part of the Moon. It was named after American astronomer Asaph Hall. This feature can be found to the east of the prominent walled plain Posidonius. Just to the south, and nearly attached to the southern rim of Hall is the smaller crater G. Bond. This crater formation has been significantly disintegrated by smaller impacts around the outer rim, leaving a wall that is deeply notched and incised. There is a gap in the western rim through which the interior has been flooded and resurfaced by layers of basaltic lava. Thus all that remains of the original crater is an irregular, crescent-shaped formation along the southern edge of the Lacus Somniorum. The southern rim is attached to the rough terrain to the south of the mare, and the irregular satellite crater G. Bond G is attached to the southeast rim. Passing across the open mouth of this crater is the rille Rille (G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
