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Rachmaninoff (crater)
Rachmaninoff is an impact crater on Mercury. This basin, first imaged in its entirety during ''MESSENGER''s third Mercury flyby, was quickly identified as a feature of high scientific interest, because of its fresh appearance, its distinctively colored interior plains, and the extensional troughs on its floor. The morphology of Rachmaninoff is similar to that of Raditladi, which is one of the youngest impact basins on Mercury. The age of Raditladi is estimated at one billion years. Rachmaninoff appears to be only slightly older. The central part of Rachmaninoff is occupied by a peak ring 130 km in diameter and somewhat elongated in the north–south direction. The area within it is covered by bright reddish smooth plains, which are different in color from the plains outside the peak ring. These plains are likely to be of volcanic origin because they show signs of flow. They also over-topped and covered the southern portion of the peak ring itself. The lowest recorded elev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MESSENGER
Messenger, Messengers, The Messenger or The Messengers may refer to: People * Courier, a person or company that delivers messages, packages, or mail * Messenger (surname) * Bicycle messenger, a bicyclist who transports packages through cities * Messenger-at-arms, an officer of the Scottish Court of Session * Messenger of the Court, a court officer responsible for carrying communications and executing other orders * Prophets and messengers in Islam * Muhammad and other prophets in Islam, who were known as Messengers of Allah (God) Science and technology Biology and chemistry * Chemical messenger, such as a hormone or neurotransmitter, a molecule used for cellular signalling * Messenger RNA (mRNA), RNA that carries information from DNA to the ribosome sites of protein synthesis in a cell Electronics and computing *Instant messenger, a tool for online text communication **Facebook Messenger, an instant messaging service by Meta (Facebook) **Microsoft Messenger service, an instant me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caloris
Caloris Planitia is a plain within a large impact basin on Mercury, informally named Caloris, about in diameter. It is one of the largest impact basins in the Solar System. "Calor" is Latin for "heat" and the basin is so-named because the Sun is almost directly overhead every second time Mercury passes perihelion. The crater, discovered in 1974, is surrounded by the Caloris Montes, a ring of mountains approximately tall. Appearance Caloris was discovered on images taken by the ''Mariner 10'' probe in 1974. Its name was suggested by Brian O'Leary, astronaut and member of the ''Mariner 10'' imagery team. It was situated on the terminator—the line dividing the daytime and nighttime hemispheres—at the time the probe passed by, and so half of the crater could not be imaged. Later, on January 15, 2008, one of the first photos of the planet taken by the ''MESSENGER'' probe revealed the crater in its entirety. The basin was initially estimated to be about in diameter, though ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calypso Rupes
Different types of geological features on the planet Mercury are named after different things: Mercurian ridges are called dorsa, and are named after astronomers who made detailed studies of the planet; valleys are called valles, and are named after ancient abandoned cities, towns, and settlements; crater chains are called catenae and are named after radio telescope facilities; plains are called planitiae, and most are named after mythological names associated with Mercury; escarpments are called rupes and are named after the ships of famous explorers; long, narrow depressions are called fossae and are named after works of architecture; bright spots are called faculae and are named after the word 'snake' in various languages. Longitude is west longitude. List of geological features on Mercury See also * List of craters on Mercury * List of albedo features on Mercury This is a list of the albedo features of the planet Mercury as seen by early telescopic observation. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asawa (crater)
Asawa is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) on November 14, 2024. The crater is named for Japanese-American sculptor Ruth Aiko Asawa. Asawa is west of the large Rachmaninoff crater. An unnamed crater with a bright ray system is located northeast of Asawa. Asawa crater central peak EN0250016834M.jpg, Hollows are present on some of the peaks in Asawa's central peak complex Rayed crater near Asawa crater MESSENGER WAC IGF to RGB.jpg, Exaggerated color view of the crater with bright ray system In planetary geology, a ray system comprises radial streaks of fine '' ejecta'' thrown out during the formation of an impact crater, looking somewhat like many thin spokes coming from the hub of a wheel. The rays may extend for lengths up to ... northeast of Asawa References Impact craters on Mercury {{Mercury-planet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathair Facula
Nathair Facula is a bright region on the surface of Mercury, located at 36° N, 295.5° W. It was named by the IAU in 2018. ''Nathair'' is the Irish and Scottish Gaelic word for snake. In the center of the region is an irregular depression with crisp topography, surrounded by a region of subdued features. It is interpreted to be the site of explosive volcanic eruptions. Hollows have formed within the depression. published 16 March 2015. NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington The is approximately 270 km wide, although the edges are diffuse. Nathair Facula is located in the |
Neidr Facula
Neidr Facula is a bright, irregular depression on the surface of Mercury, located at 35.9° N, 302.7° W. It was named by the IAU in 2018. ''Neidr'' is the Welsh word for snake. Neidr Facula is believed to be a large volcanic vent.David Pegg, David Rothery, M.R. Balme, Susan Conway, 2021. Explosive vent sites on Mercury: Commonplace multiple eruptions and their implications. Icarus 365:114510doi.org/10.1016/j.icarus.2021.114510/ref> Neidr Facula is located north of the prominent Rachmaninoff crater and west of the bright Nathair Facula Nathair Facula is a bright region on the surface of Mercury, located at 36° N, 295.5° W. It was named by the IAU in 2018. ''Nathair'' is the Irish and Scottish Gaelic word for snake. In the center of the region is an irregular depression wi .... References Surface features of Mercury {{Mercury-planet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suge Facula
Suge Facula is a bright region on the surface of Mercury (planet), Mercury, located at 26.1 N, 300.4 W. It was named by the International Astronomical Union, IAU in 2018. ''Suge'' is the Basque language, Basque word for snake. Suge Facula lies between the inner peak ring and rim in the southeast portion of Rachmaninoff (crater), Rachmaninoff crater, in the Hokusai quadrangle of Mercury. File:Suge Facula MESSENGER WAC IGF to RGB.jpg, Suge Facula in exaggerated color File:Suge Facula MESSENGER NAC mosaic.jpg, Oblique view of most of the facula, looking southwest. The distance from upper left to lower right is about 57 km. References Surface features of Mercury {{Mercury-planet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rembrandt (crater)
Rembrandt is a large impact crater on Mercury. With a diameter of 716 km it is the second-largest impact basin on the planet, after Caloris, and is one of the larger craters in the Solar System. It was discovered by ''MESSENGER'' during its second flyby of Mercury on October 6, 2008. The crater is 3.9 billion years old, and was created during the period of Late Heavy Bombardment. The density and size distribution of impact craters along Rembrandt's rim indicate that it is one of the youngest impact basins on Mercury. The crater is named after Dutch painter Rembrandt Harmenszoon van Rijn. Background Rembrandt was discovered in the images taken by the ''MESSENGER'' spacecraft during its second flyby of Mercury on October 6, 2008.. Seimages/ref> The crater is situated in the southern hemisphere of the planet at the latitude of about −33°. It is named after famous Dutch painter Rembrandt Harmenszoon van Rijn (1606–1669). The name ''Rembrandt'' was approved by the Inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graben
In geology, a graben () is a depression (geology), depressed block of the Crust (geology), crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German language, German, meaning 'ditch' or 'trench'. The first known usage of the word in the geologic context was by Eduard Suess in 1883. The plural form is either ''graben'' or ''grabens''. Formation A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with Horst (geology), horsts. Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced by sets of normal faults that have parallel fault traces, where the displacement of the hanging wall is downward, while that of the footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hokusai Quadrangle
The Hokusai quadrangle (H-5) is one of fifteen quadrangles on the planet Mercury. It runs from 360 to 270° longitude and 20 to 70° latitude. Named after the Hokusai crater, it was mapped in detail for the first time after ''MESSENGER'' entered orbit around Mercury in 2011. It had not been mapped prior to that point because it was one of the six quadrangles that was not illuminated when ''Mariner 10'' made its flybys in 1974 and 1975. These six quadrangles continued to be known by their albedo feature names, with this one known as the Apollonia quadrangle. Prominent features within Hokusai quadrangle, other than Hokusai itself, include the large peak ring crater Rachmaninoff and the somewhat smaller crater Rustaveli. Two faculae, or bright areas, are north of Rachmaninoff. One is the prominent Nathair Facula and the other is the subdued Neidr Facula. These are thought to be volcanic vents. A similar (unnamed) feature without bright coloration is northeast of the crate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Ring
A peak ring crater is a type of complex crater, which is different from a multi-ringed basin or central-peak crater. A central peak is not seen; instead, a roughly circular ring or plateau, possibly discontinuous, surrounds the Impact crater, crater's center, with the crater rim still farther out from the center. Formation The rings form by different processes, and inner rings may not be formed by the same processes as outer rings.Geology Pagewww.geologypage.com/2016/10/research-helps-explain-formation-ringed-crater-moon.html accessdate: February 5, 2017 It has long been the view that peak rings are formed in the stage subsequent to central peak formation in craters, with the stage being dependent on the crater diameter and planetary gravity. The central peaks of craters are believed to originate from hydrodynamic flow of material lifted by inward-collapsing crater walls, while impact-shattered rock debris is briefly turned to fluid by strong vibrations that develop during crater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raditladi (crater)
Raditladi is a large impact crater on Mercury with a diameter of 263 km. Inside its peak ring there is a system of concentric extensional troughs (graben), which are rare surface features on Mercury. The floor of Raditladi is partially covered by relatively light smooth plains, which are thought to be a product of the effusive volcanism. The troughs may also have resulted from volcanic processes under the floor of Raditladi. The basin is relatively young, probably younger than one billion years, with only a few small impact craters on its floor and with well-preserved basin walls and peak-ring structure. It is one of 110 peak ring basins on Mercury. Background During its first flyby of Mercury in January 2008 ''MESSENGER'' spacecraft discovered a large impact crater approximately 2000 km west of the Caloris basin on the part of Mercury's surface previously not seen by spacecraft. This crater (or basin) was subsequently (on 8 April 2008) named ''Raditladi'' after Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
