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Johan Maurits Mohr
thumbnail, Mohr observatory in Batavia ( Dutch East Indies). Johan Maurits Mohr (ca. 18 August 1716, Eppingen – 25 October 1775, Batavia) was a Dutch-German pastor who studied at Groningen University from 1733 and settled in Batavia ( Dutch East Indies) in 1737. Mohr's greatest passion was in astronomy but he was also keenly interested in meteorology and in vulcanology. In 1765 Mohr built a large private observatory in Batavia that was equipped with the best astronomical instruments of his time. His observatory, which had cost him a small fortune, was visited and praised by Louis Antoine de Bougainville and James Cook. Mohr observed the Venus transits of 6 June 1761 and 3 June 1769 and the Mercury transit of 10 November 1769. He also made meteorological observations and measurements of the magnetic declination at Batavia. After Mohr's death, his observatory was damaged by an earthquake in 1780, fell into ruin and was demolished in 1812. The minor planet 5494 Johanmohr is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohr2
Mohr may refer to: Places * Mohr, Fars, a city in Iran * Mohr County, an administrative subdivision of Iran * Mohr Rural District, an administrative subdivision of Iran Science and math * Mohr's circle, two-dimensional graphical representation of the state of stress at a point * Mohr–Coulomb theory, mathematical model describing the response of brittle materials * Mohr–Mascheroni theorem, used in mathematics and geometry * Mohr pipette, a laboratory volumetric instrument * Mohr's salt, common name of Ammonium iron(II) sulfate Other * Mohr (surname), a German-language surname (also listing people with that surname) * Michigan Organization for Human Rights, a defunct Michigan LGBT and human rights advocacy organization * Saint Maurice (died 287), French pronunciation transliterated into German "Moritz" or short, "Mohr" * Turbah, a small clay tablet used by Shi'a Muslims during daily prayers See also * Mohur (alternate spelling), a gold coin of South Asia * Moor (disambiguatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transit Of Venus
frameless, upright=0.5 A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against (and hence obscuring a small portion of) the solar disk. During a transit, Venus can be seen from Earth as a small black dot moving across the face of the Sun. The duration of such transits is usually several hours (the transit of 2012 lasted 6 hours and 40 minutes). A transit is similar to a solar eclipse by the Moon. While the diameter of Venus is more than three times that of the Moon, Venus appears smaller, and travels more slowly across the face of the Sun, because it is much farther away from Earth. Transits of Venus are among the rarest of predictable astronomical phenomena. They occur in a pattern that generally repeats every 243 years, with pairs of transits eight years apart separated by long gaps of 121.5 years and 105.5 years. The periodicity is a reflection of the fact that the orbital periods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Heilbronn (district)
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colonial Architecture In Jakarta
Colonial buildings and structures in Jakarta include those that were constructed during the Dutch East Indies, Dutch colonial period of Indonesia. The period (and the subsequent style) succeeded the earlier period when Jakarta (known then as Jayakarta/Jacatra), governed by the Sultanate of Banten, were completely eradicated and replaced with a walled city of Batavia. The dominant styles of the colonial period can be divided into three periods: the Dutch Golden Age (17th to late 18th century), the transitional style period (late 18th century – 19th century), and Dutch modernism (20th century). Dutch colonial architecture in Jakarta is apparent in buildings such as houses or villas, churches, civic buildings, and offices, mostly concentrated in the administrative city of Central Jakarta and West Jakarta. Below is a list of colonial buildings and structures found in Jakarta. The list is sorted alphabetically according to its official (local) name. The list can also be sorted to eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Protestant Ministers And Clergy
Dutch commonly refers to: * Something of, from, or related to the Netherlands * Dutch people () * Dutch language () Dutch may also refer to: Places * Dutch, West Virginia, a community in the United States * Pennsylvania Dutch Country People Ethnic groups * Germanic peoples, the original meaning of the term ''Dutch'' in English ** Pennsylvania Dutch, a group of early Germanic immigrants to Pennsylvania *Dutch people, the Germanic group native to the Netherlands Specific people * Dutch (nickname), a list of people * Johnny Dutch (born 1989), American hurdler * Dutch Schultz (1902–1935), American mobster born Arthur Simon Flegenheimer * Dutch Mantel, ring name of American retired professional wrestler Wayne Maurice Keown (born 1949) * Dutch Savage, ring name of professional wrestler and promoter Frank Stewart (1935–2013) Arts, entertainment, and media Fictional characters * Dutch (''Black Lagoon''), an African-American character from the Japanese manga and anime ''Black L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century Dutch Astronomers
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1775 Deaths
Events Summary The American Revolutionary War began this year, with the first military engagement being the April 19 Battles of Lexington and Concord on the day after Paul Revere's now-legendary ride. The Second Continental Congress takes various steps toward organizing an American government, appointing George Washington commander-in-chief (June 14), Benjamin Franklin postmaster general (July 26) and creating a Continental Navy (October 13) and a Marine force (November 10) as landing troops for it, but as yet the 13 colonies have not declared independence, and both the British (June 12) and American (July 15) governments make laws. On July 6, Congress issues the Declaration of the Causes and Necessity of Taking Up Arms and on August 23, King George III of Great Britain declares the American colonies in rebellion, announcing it to Parliament on November 10. On June 17, two months into the colonial siege of Boston, at the Battle of Bunker Hill, just north of Boston, Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1716 Births
Events January–March * January 16 – The application of the Nueva Planta decrees to Catalonia make it subject to the laws of the Crown of Castile, and abolishes the Principality of Catalonia as a political entity, concluding the unification of Spain under Philip V. * January 27 – The Tugaloo massacre changes the course of the Yamasee War, allying the Cherokee nation with the British province of South Carolina against the Creek Indian nation. * January 28 – The town of Crieff, Scotland, is burned to the ground by Jacobites returning from the Battle of Sheriffmuir. * February 3 – The 1716 Algiers earthquake sequence began with an 7.0 mainshock that caused severe damage and killed 20,000 in Algeria. * February 10 – James Edward Stuart flees from Scotland to France with a handful of supporters, following the failure of the Jacobite rising of 1715. * February 24 – Jacobite leaders James Radclyffe, 3rd Earl of Derwentwater and W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Asteroids
The following is a list of numbered minor planets in ascending numerical order. With the exception of comets, minor planets are all small bodies in the Solar System, including asteroids, distant objects and dwarf planets. The catalog consists of hundreds of pages, each containing 1,000 minor planets. Every year, the Minor Planet Center, which operates on behalf of the International Astronomical Union, publishes thousands of newly numbered minor planets in its ''Minor Planet Circulars'' ''(see index)''. , there are 619,150 numbered minor planets (secured discoveries) out of a total of 1,233,701 observed small Solar System bodies, with the remainder being unnumbered minor planets and comets. The catalog's first object is , discovered by Giuseppe Piazzi in 1801, while its best-known entry is Pluto, listed as . The vast majority (97.3%) of minor planets are asteroids from the asteroid belt (the catalog uses a color code to indicate a body's dynamical classification). There ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Declination
Magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North Pole). This angle varies depending on position on the Earth's surface and changes over time. Somewhat more formally, Bowditch defines variation as “the angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or west to indicate the direction of magnetic north from true north. The angle between magnetic and grid meridians is called grid magnetic angle, grid variation, or grivation.” By convention, declination is positive when magnetic north is east of true north, and negative when it is to the west. ''Isogonic lines'' are lines on the Earth's surface along which the declination has the same constant value, and line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transit Of Mercury
frameless, upright=0.5 A transit of Mercury across the Sun takes place when the planet Mercury passes directly between the Sun and a superior planet. During a transit, Mercury appears as a tiny black dot moving across the Sun as the planet obscures a small portion of the solar disk. Because of orbital alignments, transits viewed from Earth occur in May or November. The last four such transits occurred on May 7, 2003; November 8, 2006; May 9, 2016; and November 11, 2019. The next will occur on November 13, 2032. A typical transit lasts several hours. Mercury transits are much more frequent than transits of Venus, with about 13 or 14 per century, primarily because Mercury is closer to the Sun and orbits it more rapidly. On June 3, 2014, the Mars rover ''Curiosity'' observed the planet Mercury transiting the Sun, marking the first time a planetary transit has been observed from a celestial body besides Earth. Scientific investigation The orbit of the planet Mercury lies interi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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