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Hamburg Observatory
Hamburg Observatory () is an astronomical observatory located in the Bergedorf borough of the city of Hamburg in northern Germany. It is owned and operated by the University of Hamburg, Germany since 1968, although it was founded in 1825 by the City of Hamburg and moved to its present location in 1912. It has operated telescopes at Bergedorf, at two previous locations in Hamburg, at other observatories around the world, and it has also supported space missions. The largest near-Earth object was discovered at this Observatory by German astronomer Walter Baade at the Bergedorf Observatory in Hamburg on 23 October 1924. That asteroid, 1036 Ganymed is about 20 miles (35 km) in diameter. The Hamburg 1-meter Reflector Telescope, reflector telescope (first light 1911) was one of the biggest telescopes in Europe at that time, and by some measures the fourth largest in the World. The Observatory also has an old style Great Refractor (a ''Großen Refraktor''), a long telescope with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Ludwig Christian Rümker
Carl Ludwig Christian Rümker (28 May 1788 – 21 December 1862) was a German astronomer. Early life (1788-1821) Rümker was born in Burg Stargard, in Mecklenburg, Germany, the son of J. F. Rümker, a court-councillor. He showed an aptitude for mathematics and studied at the Builders' Academy, Berlin, graduating in 1807 as a master builder. Instead of a career in building, he taught mathematics in Hamburg until 1809 when he went to England. Rümker served as a midshipman in the British East India Company and then in the Great Britain, British merchant navy from 1811 until 1813. In July 1813 he was seized by a pressgang and joined the Royal Navy. He served in the Royal Navy as a schoolmaster until 1817 on ''HMS Benbow'', ''Montague'' and ''Albion'' taking part in the expedition to Algiers in 1816 whilst on the ''Albion''. In 1817 he met Austrian astronomer Baron Franz Xaver von Zach, who influenced Rümker to study astronomy. Rümker was director of the school of navigation at H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescope
A telescope is a device used to observe distant objects by their emission, Absorption (electromagnetic radiation), absorption, or Reflection (physics), reflection of electromagnetic radiation. Originally, it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word "telescope" is defined as a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aperture
In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image of the aperture and focal length of an optical system determine the cone angle of a bundle of rays that comes to a focus in the image plane. An optical system typically has many structures that limit ray bundles (ray bundles are also known as ''pencils'' of light). These structures may be the edge of a lens or mirror, or a ring or other fixture that holds an optical element in place or may be a special element such as a diaphragm placed in the optical path to limit the light admitted by the system. In general, these structures are called stops, and the aperture stop is the stop that primarily determines the cone of rays that an optical system accepts (see entrance pupil). As a result, it also determines the ray cone angle and brightne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg University
The University of Hamburg (, also referred to as UHH) is a public research university in Hamburg, Germany. It was founded on 28 March 1919 by combining the previous General Lecture System ('' Allgemeines Vorlesungswesen''), the Hamburg Colonial Institute ('' Hamburgisches Kolonialinstitut''), and the Academic College ('' Akademisches Gymnasium''). The main campus is located in the central district of Rotherbaum, with affiliated institutes and research centres distributed around the city-state. Seven Nobel Prize winners and one Wolf Prize winner are affiliated with UHH. History Founding At the beginning of the 20th century, wealthy individuals made several unsuccessful petitions to the Hamburg Senate and Parliament requesting the establishment of a university. Senator Werner von Melle worked towards the merging of existing institutions into one university, but this plan failed. Much of the establishment wanted to see Hamburg limited to its role as a trading center, and wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Southern Observatory
The European Organisation for Astronomical Research in the Southern Hemisphere, commonly referred to as the European Southern Observatory (ESO), is an intergovernmental organization, intergovernmental research organisation made up of 16 member states for ground-based astronomy. Created in 1962, ESO has provided astronomers with state-of-the-art research facilities and access to the southern sky. The organisation employs over 750 staff members and receives annual member state contributions of approximately €162 million. Its observatories are located in northern Chile. ESO has built and operated some of the largest and most technologically advanced telescopes. These include the 3.6 m New Technology Telescope, an early pioneer in the use of active optics, and the Very Large Telescope (VLT), which consists of four individual 8.2 m telescopes and four smaller auxiliary telescopes which can all work together or separately. The Atacama Large Millimeter Array observes the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris (diaphragm)
In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to ''stop'' the passage of light, except for the light passing through the ''aperture''. Thus it is also called a stop (an aperture stop, if it limits the brightness of light reaching the focal plane, or a field stop or flare stop for other uses of diaphragms in lenses). The diaphragm is placed in the light path of a lens or objective, and the size of the aperture regulates the amount of light that passes through the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system. Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris. See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm. Iris diaphragms versus other types A natural optical system that has a diaphragm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Pollution
Light pollution is the presence of any unwanted, inappropriate, or excessive artificial Visible spectrum, lighting. In a descriptive sense, the term ''light pollution'' refers to the effects of any poorly implemented lighting sources, during the day or night. Light pollution can be understood not only as a phenomenon resulting from a specific source or kind of pollution, but also as a contributor to the wider, collective impact of various sources of pollution. Although this type of pollution can exist throughout the day, its effects are magnified during the night with the contrast of the sky's darkness. It has been estimated that 83% of the world's people live under light-polluted skies and that 23% of the world's land area is affected by skyglow. The area affected by artificial illumination continues to increase. A major side effect of urbanization, light pollution is blamed for compromising health, disrupting ecosystems, and spoiling aesthetic environments. Studies show that ur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburgmuseum
The Museum of Hamburg History () is a history museum located in the city of Hamburg in northern Germany. The museum was established in 1908 and opened at its current location in 1922, although its parent organization was founded in 1839. The museum is located near the park in the center of Hamburg. History The Society of Hamburg History (), founded in 1839, started compiling the Collection of Hamburg Antiquities (). First exhibits included architectural fragments of the demolished St. Mary's Cathedral, Hamburg, St. Mary's Cathedral and two monasteries. The main building at Holstenwall was designed by Fritz Schumacher (architect), Fritz Schumacher and constructed between 1914 and 1922. The museum was built on the site of the former Bastion Henricus, a part of the baroque fortification which was erected between 1616 and 1625 by the Dutchman Jan van Valckenborgh in order to make the town impregnable. The museum's courtyard was damaged during the Great Fire of Hamburg in 1842 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Medal Of The Royal Astronomical Society
The Gold Medal of the Royal Astronomical Society is the highest award given by the Royal Astronomical Society (RAS). The RAS Council have "complete freedom as to the grounds on which it is awarded" and it can be awarded for any reason. Past awards have been given for "outstanding personal researches in the fields of astronomy and geophysics" as well as general contributions to astronomy and geophysics "that may be made through leadership in research programmes, through education and through scientific administration". It has been awarded both for research that has taken a lifetime (it has most frequently been given to recognise an extraordinary lifetime achievement), and for specific pieces of research. History The RAS was founded in 1820 and the first Gold Medals were awarded in 1824. Silver medals were also awarded in 1824 and 1827, but that practice was quickly abandoned, instead the Royal Astronomical Society#Awards, RAS established other awards. In the early years, more tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Friedrich Wilhelm Rümker
Georg Friedrich Wilhelm Rümker (December 31, 1832 – March 3, 1900) was a German astronomer. Biography Born at Hamburg, Georg Rümker was the son of Carl Ludwig Christian Rümker. He was astronomer at the observatory at Durham, England, from 1853 to 1856. He then became assistant at the ''Hamburger Sternwarte'' (Hamburg Observatory), then located at Stadtwall, and in 1862 was appointed director. He served as director until his death in 1900. He was succeeded by Richard Schorr. When the Geographic Society in Hamburg was founded in 1873 he was appointed as second secretary. His wife, Mary Hannah Crockford (1809–1889) was also an astronomer, known for her discovery of a comet in 1847 (which was observed slightly earlier by american astronomer Maria Mitchell Maria Mitchell ( ; August 1, 1818 – June 28, 1889) was an American astronomer, librarian, naturalist, and educator. In 1847, she discovered a comet named 1847 VI (modern designation C/1847 T1) that was later known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
