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Huygens Lemniscate
Huygens (also Huijgens, Huigens, Huijgen/Huygen, or Huigen) is a Dutch patronymic surname, meaning "son of Hugo". Most references to "Huygens" are to the polymath Christiaan Huygens. Notable people with the surname include: * Jan Huygen (1563–1611), Dutch voyager and historian * Constantijn Huygens (1596–1687), Dutch poet, diplomat, scholar and composer * Constantijn Huygens, Jr. (1628–1697), Dutch statesman, soldier, and telescope maker, son of Constantijn Huygens * Christiaan Huygens (1629–1695), Dutch mathematician, physicist and astronomer, son of Constantijn Huygens * Lodewijck Huygens (1631–1699), Dutch diplomat, the third son of Constantijn Huygens * Cornélie Huygens (1848–1902), Dutch writer, social democrat and feminist * Léon Huygens (1876–1918), Belgian painter * Jan Huijgen (1888–1964), Dutch speedwalker * Christiaan Huijgens (1897–1963), Dutch long-distance runner * Wil Huygen (1922–2009), Dutch children's and fantasy writer, e.g. of Gnomes Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Language
Dutch ( ) is a West Germanic language spoken by about 25 million people as a first language and 5 million as a second language. It is the third most widely spoken Germanic language, after its close relatives German and English. ''Afrikaans'' is a separate but somewhat mutually intelligible daughter languageAfrikaans is a daughter language of Dutch; see , , , , , . Afrikaans was historically called Cape Dutch; see , , , , , . Afrikaans is rooted in 17th-century dialects of Dutch; see , , , . Afrikaans is variously described as a creole, a partially creolised language, or a deviant variety of Dutch; see . spoken, to some degree, by at least 16 million people, mainly in South Africa and Namibia, evolving from the Cape Dutch dialects of Southern Africa. The dialects used in Belgium (including Flemish) and in Suriname, meanwhile, are all guided by the Dutch Language Union. In Europe, most of the population of the Netherlands (where it is the only official language spoken country ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassini–Huygens
''Cassini–Huygens'' ( ), commonly called ''Cassini'', was a space research, space-research mission by NASA, the European Space Agency (ESA), and the Italian Space Agency (ASI) to send a space probe to study the planet Saturn and its system, including its Rings of Saturn, rings and Moons of Saturn, natural satellites. The Large Strategic Science Missions, Flagship-class robotic spacecraft comprised both NASA's ''Cassini'' space probe and ESA's Huygens (spacecraft), ''Huygens'' lander (spacecraft), lander, which landed on Saturn's largest moon, Titan (moon), Titan. ''Cassini'' was the fourth space probe to visit Saturn and the first to enter its orbit, where it stayed from 2004 to 2017. The two craft took their names from the astronomers Giovanni Domenico Cassini, Giovanni Cassini and Christiaan Huygens. Launched aboard a Titan IV, Titan IVB/Centaur on October 15, 1997, ''Cassini'' was active in space for nearly 20 years, with 13 years spent orbiting Saturn and studying the pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens Software
Huygens software refers to different multiplatform microscope image processing packages from Scientific Volume Imaging, made for restoring 2D and 3D microscopy images or time series and analyzing and visualizing them. The restoration is based on different deconvolution algorithms, that permit the recovery of objects from images that are degraded by blurring and noise. In microscopy the blurring is largely due to diffraction limited imaging by the instrument; the noise is usually photon noise. The scientific visualization of 3D volume data is based on the simulated fluorescence process algorithm (SFP), but isosurfaces and maximum intensity projections are also used for object analysis and colocalization. Huygens software is named after the Dutch physicist Christiaan Huygens Christiaan Huygens, Lord of Zeelhem, ( , , ; also spelled Huyghens; la, Hugenius; 14 April 1629 – 8 July 1695) was a Dutch mathematician, physicist, engineer, astronomer, and inventor, who is regar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens Eyepiece
An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is named because it is usually the lens that is closest to the eye when someone looks through the device. The objective lens or mirror collects light and brings it to focus creating an image. The eyepiece is placed near the focal point of the objective to magnify this image. The amount of magnification depends on the focal length of the eyepiece. An eyepiece consists of several "lens elements" in a housing, with a "barrel" on one end. The barrel is shaped to fit in a special opening of the instrument to which it is attached. The image can be focused by moving the eyepiece nearer and further from the objective. Most instruments have a focusing mechanism to allow movement of the shaft in which the eyepiece is mounted, without needing to manipulate the eyepiece directly. The eyepieces of binoculars are usually permanently mounted in the binoculars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens Lemniscate
Huygens (also Huijgens, Huigens, Huijgen/Huygen, or Huigen) is a Dutch patronymic surname, meaning "son of Hugo". Most references to "Huygens" are to the polymath Christiaan Huygens. Notable people with the surname include: * Jan Huygen (1563–1611), Dutch voyager and historian * Constantijn Huygens (1596–1687), Dutch poet, diplomat, scholar and composer * Constantijn Huygens, Jr. (1628–1697), Dutch statesman, soldier, and telescope maker, son of Constantijn Huygens * Christiaan Huygens (1629–1695), Dutch mathematician, physicist and astronomer, son of Constantijn Huygens * Lodewijck Huygens (1631–1699), Dutch diplomat, the third son of Constantijn Huygens * Cornélie Huygens (1848–1902), Dutch writer, social democrat and feminist * Léon Huygens (1876–1918), Belgian painter * Jan Huijgen (1888–1964), Dutch speedwalker * Christiaan Huijgens (1897–1963), Dutch long-distance runner * Wil Huygen (1922–2009), Dutch children's and fantasy writer, e.g. of Gnomes Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens–Steiner Theorem
The parallel axis theorem, also known as Huygens–Steiner theorem, or just as Steiner's theorem, named after Christiaan Huygens and Jakob Steiner, can be used to determine the moment of inertia or the second moment of area of a rigid body about any axis, given the body's moment of inertia about a parallel axis through the object's center of gravity and the perpendicular distance between the axes. Mass moment of inertia Suppose a body of mass is rotated about an axis passing through the body's center of mass. The body has a moment of inertia with respect to this axis. The parallel axis theorem states that if the body is made to rotate instead about a new axis , which is parallel to the first axis and displaced from it by a distance , then the moment of inertia with respect to the new axis is related to by : I = I_\mathrm + md^2. Explicitly, is the perpendicular distance between the axes and . The parallel axis theorem can be applied with the stretch rule and perpendi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens Law
Huygens (also Huijgens, Huigens, Huijgen/Huygen, or Huigen) is a Dutch patronymic surname, meaning "son of Hugo". Most references to "Huygens" are to the polymath Christiaan Huygens. Notable people with the surname include: * Jan Huygen (1563–1611), Dutch voyager and historian * Constantijn Huygens (1596–1687), Dutch poet, diplomat, scholar and composer * Constantijn Huygens, Jr. (1628–1697), Dutch statesman, soldier, and telescope maker, son of Constantijn Huygens * Christiaan Huygens (1629–1695), Dutch mathematician, physicist and astronomer, son of Constantijn Huygens * Lodewijck Huygens (1631–1699), Dutch diplomat, the third son of Constantijn Huygens * Cornélie Huygens (1848–1902), Dutch writer, social democrat and feminist * Léon Huygens (1876–1918), Belgian painter * Jan Huijgen (1888–1964), Dutch speedwalker * Christiaan Huijgens (1897–1963), Dutch long-distance runner * Wil Huygen (1922–2009), Dutch children's and fantasy writer, e.g. of Gnomes Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens–Fresnel Principle
The Huygens–Fresnel principle (named after Dutch physicist Christiaan Huygens and French physicist Augustin-Jean Fresnel) states that every point on a wavefront is itself the source of spherical wavelets, and the secondary wavelets emanating from different points mutually interfere. The sum of these spherical wavelets forms a new wavefront. As such, the Huygens-Fresnel principle is a method of analysis applied to problems of luminous wave propagation both in the far-field limit and in near-field diffraction as well as reflection. History In 1678, Huygens proposed that every point reached by a luminous disturbance becomes a source of a spherical wave; the sum of these secondary waves determines the form of the wave at any subsequent time. He assumed that the secondary waves travelled only in the "forward" direction and it is not explained in the theory why this is the case. He was able to provide a qualitative explanation of linear and spherical wave propagation, and to der ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rings Of Saturn
The rings of Saturn are the most extensive ring system of any planet in the Solar System. They consist of countless small particles, ranging in size from micrometers to meters, that orbit around Saturn. The ring particles are made almost entirely of water ice, with a trace component of rocky material. There is still no consensus as to their mechanism of formation. Although theoretical models indicated that the rings were likely to have formed early in the Solar System's history, newer data from '' Cassini'' suggested they formed relatively late. Although reflection from the rings increases Saturn's brightness, they are not visible from Earth with unaided vision. In 1610, the year after Galileo Galilei turned a telescope to the sky, he became the first person to observe Saturn's rings, though he could not see them well enough to discern their true nature. In 1655, Christiaan Huygens was the first person to describe them as a disk surrounding Saturn. The concept that Saturn's rin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mons Huygens ...
Mons Huygens is the Moon's tallest mountain (but not its highest point, which is Selenean Summit). It is about high and is located in the Montes Apenninus. Adjacent to the west is Mons Ampère. The Montes Apenninus were formed by the impact that created Mare Imbrium. The mountain was named after the Dutch astronomer, mathematician and physician Christiaan Huygens., accessed August 19, 2017 Surroundings See also *List of tallest mountains in the Solar System *Astrogeology References External links Mons Huygensat the Moon WikiAnnotated mapsource {{DEFAULTSORT:Huygens Mons Mountains on the Moon Mons Huygens Mons Huygens is the Moon's tallest mountain (but not its highest point, which is Selenean Summit). It is about high and is located in the Montes Apenninus. Adjacent to the west is Mons Ampère. The Montes Apenninus were formed by the impact tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huygens (crater)
Huygens is an impact crater on Mars named in honour of the Dutch astronomer, mathematician and physicist Christiaan Huygens. It is the fifth largest recognizable impact crater on Mars after Utopia, Hellas, Argyre, and Isidis, and the largest one with a near intact rim. The crater is approximately in diameter and can be found at 304.42°W 13.88°S, in the Iapygia quadrangle. Scientists were delighted to see branched channels in pictures taken with spacecraft that were sent in orbit around Mars. The existence of these channels is strong evidence that much water once flowed on the surface of the planet. Simple organisms may have once lived where water once was. An excellent group of these channels is shown in the picture below from the rim of Huygens taken with THEMIS. Carbonates (calcium or iron carbonates) were discovered in a crater on the rim of Huygens. The impact on the rim exposed material that had been dug up from the impact that created Huygens. These minerals represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
