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Mare Tranquillitatis
Mare Tranquillitatis (Latin for Sea of Tranquillity or Sea of Tranquility) 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. The mare material within the basin consists of basalt formed in the intermediate to young age group of the Upper Imbrian epoch. The surrounding mountains are thought to be of the Lower Imbrian epoch, but the actual basin is probably Pre-Nectarian. The basin has irregular margins and lacks a defined multiple-ringed structure. The irregular topography in and near this basin results from the intersection of the Tranquillitatis, Mare Nectaris, Nectaris, Mare Crisium, Crisium, Mare Fecunditatis, Fecunditatis, and Mare Serenitatis, Serenitatis basins with two throughgoing rings of the Oceanus Procellarum, Procellarum basin. Palus Somni, on the northeastern rim of the mare, is filled with the basalt that spilled over from Tranquillitatis. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mare Tranquillitatis Si - Ferruggia Zetta
A mare is an adult female horse or other equidae, equine. In most cases, a mare is a female horse over the age of three, and a filly is a female horse three and younger. In Thoroughbred horse racing, a mare is defined as a female horse more than four years old. The word can also be used for other female equine animals, particularly mules and zebras, but a female donkey is usually called a "jenny". A ''broodmare'' is a mare used for breeding. Reproductive cycle Mares carry their young (called foals) for approximately 11 months from conception to birth, the average range being 320–370 days.Ensminger, M. E. ''Horses and Horsemanship: Animal Agriculture Series.'' Sixth Edition. Interstate Publishers, 1990. p. 156 Usually just one young is born; twins are rare. When a domestication, domesticated mare foals, she nurses the foal for at least four to six months before it is weaning, weaned, though wild horse, mares in the wild may allow a foal to nurse for up to a year. The estr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mass Concentration (astronomy)
In astronomy, astrophysics and geophysics, a mass concentration (or mascon) is a region of a planet's or moon's crust that contains a large positive gravity anomaly. In general, the word "mascon" can be used as a noun to refer to an excess distribution of mass on or beneath the surface of an astronomical body (compared to some suitable average), such as is found around Hawaii on Earth. However, this term is most often used to describe a geologic structure that has a positive gravitational anomaly associated with a feature (e.g. depressed basin) that might otherwise have been expected to have a negative anomaly, such as the "mascon basins" on the Moon. Lunar mascons The Moon is the most gravitationally "lumpy" major body known in the Solar System. Its largest mascons can cause a plumb bob to hang about a third of a degree off expected vertical, pointing toward the mascon, and increase the force of gravity by one-half percent. Typical examples of mascon basins on the Moon are the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spacecraft
A spacecraft is a vehicle that is designed spaceflight, to fly and operate in outer space. Spacecraft are used for a variety of purposes, including Telecommunications, communications, Earth observation satellite, Earth observation, Weather satellite, meteorology, navigation, space colonization, Planetary science, planetary exploration, and Space transport, transportation of Human spaceflight, humans and cargo spacecraft, cargo. All spacecraft except single-stage-to-orbit vehicles cannot get into space on their own, and require a launch vehicle (carrier rocket). On a sub-orbital spaceflight, a space vehicle enters space and then returns to the surface without having gained sufficient energy or velocity to make a full Geocentric orbit, Earth orbit. For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other Astronomical object, celestial bodies. Spacecraft used for human spaceflight carry people on board as crew or passengers from start or on orbit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ranger 8
Ranger 8 was a lunar probe in the Ranger program, a robotic spacecraft series launched by NASA in the early-to-mid-1960s to obtain the first close-up images of the Moon's surface. These pictures helped select landing sites for Apollo missions and were used for scientific study. During its 1965 mission, Ranger 8 transmitted 7,137 lunar surface photographs before it crashed into the Moon as planned. This was the second successful mission in the Ranger series, following Ranger 7. Ranger 8's design and purpose were very similar to those of Ranger 7. It had six television vidicon cameras: two full-scan and four partial-scan. Its sole purpose was to document the Moon's surface. Spacecraft design General Ranger spacecraft were originally designed, beginning in 1959, in three distinct phases called "blocks". Rangers 6, 7, 8, and 9 were the Block 3 versions. The spacecraft consisted of a hexagonal aluminum frame base 1.5 m across on which was mounted the propulsion and power ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1645
Events January–March * January 3 – The Long Parliament adopts the ''Directory for Public Worship'' in England, Wales, Ireland and Scotland, replacing the Book of Common Prayer ( 1559). Holy Days (other than Sundays) are not to be observed. * January 10 – Archbishop of Canterbury William Laud is executed for treason on Tower Hill, London. * January 14 – English Civil War: Thomas Fairfax is appointed Commander-in-Chief of the Parliamentarians. * January 29 – English Civil War: Armistice talks open at Uxbridge. * February 2 – Battle of Inverlochy: The Scottish Covenanters are defeated by Montrose. * February 15 – English Civil War: The New Model Army is officially founded. * February 28 – English Civil War: The Uxbridge armistice talks fail. * March 4 – English Civil War: Prince Rupert leaves Oxford for Bristol. * March 5 – Thirty Years' War – Battle of Jankau: The armies of Sweden decisively defeat t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Van Langren
Michael van Langren (April 1598 May 1675) was an astronomer and cartographer of the Low Countries. A Catholic, he chiefly found employment in service to the Spanish Monarchy. Family Michael van Langren was the youngest member of a family of Dutch cartographers. He was baptized on 27 April 1598 in Amsterdam. His grandfather, Jacob van Langren, was born in Gelderland but moved to the Southern Netherlands and later to Amsterdam, where his sons Arnold and Hendrik were born. Unusually, each member of the family retained variations of Jacob's patronym Floresz rather than separate patronyms of their own. Jacob and his sons produced globes from 1580, both terrestrial and celestial. A 1586 pair survives, the celestial globe based on astronomical data provided by Rudolf Snellius father of Willebrord Snellius, while Petrus Plancius collaborated on the 1589 edition. In 1592, the States General granted the Van Langren family a monopoly in the production of globes, which led to quarrel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenography
Selenography is the study of the surface and physical features of the Moon (also known as geography of the Moon, or selenodesy). Like geography and areography, selenography is a subdiscipline within the field of planetary science. Historically, the principal concern of selenographists was the mapping and naming of the lunar terrane identifying Lunar mare, maria, Impact crater, craters, mountain ranges, and other various features. This task was largely finished when high resolution images of the near side of the Moon, near and far side of the Moon, far sides of the Moon were obtained by orbiting spacecraft during the early space era. Nevertheless, some regions of the Moon remain poorly imaged (especially near the poles) and the exact locations of many features (like crater depths) are uncertain by several kilometers. Today, selenography is considered to be a subdiscipline of Geology of the Moon, selenology, which itself is most often referred to as simply "lunar science." History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Battista Riccioli
Giovanni Battista Riccioli (17 April 1598 – 25 June 1671) was an Italian astronomer and a Catholic priest in the Jesuit order. He is known, among other things, for his experiments with pendulums and with falling bodies, for his discussion of 126 arguments concerning the motion of the Earth, and for introducing the current scheme of lunar nomenclature. He is also widely known for discovering the first double star. He argued that the rotation of the Earth should reveal itself because on a rotating Earth, the ground moves at different speeds at different times. Biography Riccioli was born in Ferrara, Italy, Ferrara. He entered the Society of Jesus on 6 October 1614. After completing his novitiate, he began to study humanities in 1616, pursuing those studies first at Ferrara, and then at Piacenza. From 1620 to 1628 he studied philosophy and theology at the College of Parma. Parma Jesuits had developed a strong program of experimentation, such as with falling bodies. One of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francesco Maria Grimaldi
Francesco Maria Grimaldi (2 April 1618 – 28 December 1663) was an Italian Jesuit priest, mathematician and physicist who taught at the Jesuit college in Bologna. He was born in Bologna to Paride Grimaldi and Anna Cattani. Work Between 1640 and 1650, working with Riccioli, he investigated the free fall of objects, confirming that the distance of fall was proportional to the square of the time taken. Grimaldi and Riccioli also made a calculation of gravity at the Earth's surface by recording the oscillations of an accurate pendulum. In astronomy, he built and used instruments to measure lunar mountains as well as the height of clouds, and drew an accurate map or, '' selenograph'', which was published by Riccioli and now adorns the entrance to the National Air and Space Museum in Washington D.C. He discovered and was the first to make accurate observations on the diffraction of light and coined the word 'diffraction'. In his book ''Physico-Mathesis de Lumine, Colori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon Names
The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar day) that is synchronized to its orbital period (Lunar month#Synodic month, lunar month) of 29.5 Earth days. This is the product of Earth's gravitation having tidal forces, tidally pulled on the Moon until one part of it stopped rotating away from the near side of the Moon, near side, making always the same lunar surface face Earth. Conversley, the gravitational pull of the Moon, on Earth, is the main driver of Earth's tides. In geophysical definition of planet, geophysical terms, the Moon is a planetary-mass object or satellite planet. Its mass is 1.2% that of the Earth, and its diameter is , roughly one-quarter of Earth's (about as wide as the contiguous United States). Within the Solar System, it is the List of Solar System objects by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity Recovery And Interior Laboratory
The Holy Grail (, , , ) is a treasure that serves as an important motif in Arthurian literature. Various traditions describe the Holy Grail as a cup, dish, or stone with miraculous healing powers, sometimes providing eternal youth or sustenance in infinite abundance, often guarded in the custody of the Fisher King and located in the hidden Grail castle. By analogy, any elusive object or goal of great significance may be perceived as a "holy grail" by those seeking such. A mysterious "grail" (Old French: ''graal'' or ''greal''), wondrous but not unequivocally holy, first appears in ''Perceval, the Story of the Grail'', an unfinished chivalric romance written by Chrétien de Troyes around 1190. Chrétien's story inspired many continuations, translators and interpreters in the later-12th and early-13th centuries, including Wolfram von Eschenbach, who portrayed the Grail as a stone in ''Parzival''. The Christian, Celtic or possibly other origins of the Arthurian grail trope are u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
