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A. O. Leuschner
Armin Otto Leuschner (January 16, 1868 – April 22, 1953) was an American astronomer and educator. Biography Leuschner was born on January 16, 1868, in the United States but raised in Germany. He returned to the United States for university studies, graduating from the University of Michigan in 1888 with a degree in mathematics. Leuschne then became the first graduate student at Lick Observatory, but due to conflicts with his advisor, Lick director Edward S. Holden, he left Lick before finishing his Ph.D. Leuschner subsequently returned to Germany and attended the University of Berlin, where in 1897 he earned his doctorate with a highly praised thesis on the orbits of comets. He returned to California as an associate professor in astronomy at University of California, Berkeley, where he remained for over half a century. He founded an observatory there for student instruction, later renamed in his honor Leuschner Observatory. Together with Lick director James E. Keeler, Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomy
Astronomy () is a natural science that studies astronomical object, celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and chronology of the Universe, evolution. Objects of interest include planets, natural satellite, moons, stars, nebulae, galaxy, galaxies, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond atmosphere of Earth, Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Babylonian astronomy, Babylonians, Greek astronomy, Greeks, Indian astronomy, Indians, Egyptian astronomy, Egyptians, Chinese astronomy, Chinese, Maya civilization, Maya, and many anc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planets Beyond Neptune
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and continued at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities. Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the ''Voyager 2'' spacecraft found that the irregularities observed in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
718 Erida
718 Erida is a minor planet orbiting the Sun. It was discovered at Vienna on September 29, 1911, by Austrian astronomer Johann Palisa, and was named for Erida Leuschner, daughter of astronomer Armin Otto Leuschner. It is orbiting at a distance of with a period of and an eccentricity of 0.20. The orbital plane of this asteroid is inclined by an angle of 6.9° to the plane of the ecliptic. Photometric observations made during 2009 were used to produce a light curve for this asteroid that showed a rotation period of with a brightness variation of 0.37 in magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of .... It spans a girth of approximately 72 km. References External links * * Background asteroids Erida Erida X-type asteroids (SMASS) 19110929 {{b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1361 Leuschneria
1361 Leuschneria, provisional designation , is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 30 August 1935, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium, and named after American astronomer Armin Otto Leuschner. Orbit ''Leuschneria'' is a carbonaceous C-type asteroid that orbits the Sun at a distance of 2.7–3.5 AU once every 5 years and 5 months (1,976 days). Its orbit has an eccentricity of 0.13 and an inclination of 22 ° with respect to the ecliptic. It was first observed at Johannesburg Observatory, extending the body's observation arc by 3 days prior to its official discovery observation at Uccle. Naming This minor planet was named after American astronomer Armin Otto Leuschner (1868–1953), on a proposal by Sylvain Arend during a visit to Berkeley, where Leuschner was the director of the Leuschner Observatory at University of California. He is known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of Australia). The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's at , with Jupiter's moon Io being the only satellite in the Solar System known to have a higher surface gravity and density. The Moon orbits Earth at an average distance of , or about 30 times Earth's diameter. Its gravitational influence is the main driver of Earth's tides and very slowly lengthens Earth's day. The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synodic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leuschner (crater)
Leuschner is a Lunar craters, lunar impact crater that is located on the Moon's Far side (Moon), far side, to the northwest of the Montes Cordillera. It lies to the north of the crater Grachev (crater), Grachev, in the outer skirt of ejecta surrounding the Mare Orientale impact basin. This is a circular crater with a rim that has only been lightly eroded by subsequent impacts. Within the interior floor is a central ridge formation. The Catena Leuschner is a crater chain formation that begins at the northern outer rim of Leuschner and runs to the northwest towards the crater Kolhörster (crater), Kolhörster. This feature is radial to the Mare Orientale impact, and was likely caused by larger chunks of ejecta during the formation of that feature. 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 Leuschner. See also * 1361 Leuschneria, minor planet References * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Oxford
, mottoeng = The Lord is my light , established = , endowment = £6.1 billion (including colleges) (2019) , budget = £2.145 billion (2019–20) , chancellor = The Lord Patten of Barnes , vice_chancellor = Louise Richardson , students = 24,515 (2019) , undergrad = 11,955 , postgrad = 12,010 , other = 541 (2017) , city = Oxford , country = England , coordinates = , campus_type = University town , athletics_affiliations = Blue (university sport) , logo_size = 250px , website = , logo = University of Oxford.svg , colours = Oxford Blue , faculty = 6,995 (2020) , academic_affiliations = , The University of Oxford is a collegiate research university in Oxf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halley Lecturer
Halley may refer to: Science * Halley's Comet, officially designated 1P/Halley, a comet that becomes visible from Earth every 75-76 years * Halley (lunar crater), a lunar crater named after Edmond Halley * Halley (Martian crater), a Martian crater named after Edmond Halley * Halley Research Station, a British research facility on the Brunt Ice Shelf floating on the Weddell Sea in Antarctica Entertainment * Halley (nightclub), a defunct Argentine nightclub * "Halley" (song), the Turkish entrant to the Eurovision Song Contest 1986 * "Halley" (film), a 2012 Mexican horror movie People * Halley (surname), multiple people ** Edmond Halley (1656–1742), English astronomer * Halley (given name), multiple people See also *Haley (other) *Halle (other) *Hailey (other) * Hayley (other) *Hali (other) Hali may refer to: * Hali I of the Maldives (died 1268), Sultan of Maldives from 1266 to 1268 * Hali II of the Maldives (died 1288), Sulta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rittenhouse Medal
The Rittenhouse Medal is awarded by the Rittenhouse Astronomical Society for outstanding achievement in the science of Astronomy. The medal was one of those originally minted to commemorate the Bi-Centenary of the birth of David Rittenhouse on April 8, 1932. In 1952 the Society decided to establish a silver medal to be awarded to astronomers for noteworthy achievement in astronomical science. The silver medal is cast from the die (obverse) used for the Bi-Centennial Rittenhouse Medal. See also * List of astronomy awards References {{reflist Astronomy prizes Awards established in 1932 1932 establishments in the United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruce Medal
The Catherine Wolfe Bruce Gold Medal is awarded every year by the Astronomical Society of the Pacific for outstanding lifetime contributions to astronomy. It is named after Catherine Wolfe Bruce, an American patroness of astronomy, and was first awarded in 1898. List of Bruce Medalists SourceAstronomical Society of the Pacific * 1898 – Simon Newcomb * 1899 – Arthur Auwers * 1900 – David Gill * 1902 – Giovanni V. Schiaparelli * 1904 – William Huggins * 1906 – Hermann Carl Vogel * 1908 – Edward C. Pickering * 1909 – George William Hill * 1911 – Henri Poincaré * 1913 – Jacobus C. Kapteyn * 1914 – Oskar Backlund * 1915 – William Wallace Campbell * 1916 – George Ellery Hale * 1917 – Edward Emerson Barnard * 1920 – Ernest W. Brown * 1921 – Henri A. Deslandres * 1922 – Frank W. Dyson * 1923 – Benjamin Baillaud * 1924 – Arthur Stanley Eddington * 1925 – Henry Norris Russell * 1926 – Robert G. Aitken * 1927 – Herbert Hall Turner * 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, Finland to the east, and is connected to Denmark in the southwest by a bridgetunnel across the Öresund. At , Sweden is the largest Nordic country, the third-largest country in the European Union, and the fifth-largest country in Europe. The capital and largest city is Stockholm. Sweden has a total population of 10.5 million, and a low population density of , with around 87% of Swedes residing in urban areas in the central and southern half of the country. Sweden has a nature dominated by forests and a large amount of lakes, including some of the largest in Europe. Many long rivers run from the Scandes range through the landscape, primarily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order Of The North Star
The Royal Order of the Polar Star (Swedish: ''Kungliga Nordstjärneorden'') is a Swedish order of chivalry created by King Frederick I on 23 February 1748, together with the Order of the Sword and the Order of the Seraphim. The Order of the Polar Star was until 1975 intended as a reward for Swedish and foreign "civic merits, for devotion to duty, for science, literary, learned and useful works and for new and beneficial institutions". Its motto is, as seen on the blue enameled centre of the badge, ''Nescit Occasum'', a Latin phrase meaning "It knows no decline". This is to represent that Sweden is as constant as a never setting star. The Order's colour is black. This was chosen so that when wearing the black sash, the white, blue and golden cross would stand out and shine as the light of enlightenment from the black surface. The choice of black for the Order's ribbon may also have been inspired by the black ribbon of the French Order of St. Michael, which at the time the Ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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