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Hartmut Jahreiß
Hartmut Jahreiß (born 1942) is a German astronomer associated with Astronomisches Rechen-Institut specializing in the study of nearby stars. Work Hartmut Jahreiß obtained his Ph.D from the University of Heidelberg. His thesis was on the spatial distribution, kinetics and age of stars near the Sun. Jahreiß soon began work at Astronomisches Rechen-Institut with Wilhelm Gliese, a world-renowned authority on nearby stars. Jahreiß is best known for his collaboration with Gliese on the publication of new editions of the ''Gliese Catalogue of Nearby Stars'' in 1979 and 1991. Upon the death of Gliese in 1993, Jahreiß wrote Gliese's obituary. The Gliese catalog stars are now known by the abbreviation ''GJ'' (Gliese–Jahreiß) in recognition of Jahreiß's contribution. Jahreiß contributed to the Hipparcos catalogs of nearby stars. In 1997, as a member of the Research Consortium on Nearby Stars (RECONS), he identified GJ 1061, at a distance of just 3.68 parsecs, as the 20th closest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, natural satellite, moons, stars, nebulae, galaxy, galaxies, meteoroids, asteroids, 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 Egyptian astronomy, Egyptians, Babylonian astronomy, Babylonians, Greek astronomy, Greeks, Indian astronomy, Indians, Chinese astronomy, Chinese, Maya civilization, M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomisches Rechen-Institut
The Astronomical Calculation Institute (; ARI) is a research institute in Heidelberg, Germany, with origins dating back from the 1700s. Beginning in 2005, the ARI became part of the Center for Astronomy at Heidelberg University (', ). Previously, the institute directly belonged to the state of Baden-Württemberg. Description The ARI has a rich history. It was founded in 1700 in Berlin-Dahlem by Gottfried Kirch. It had its origin in a patent application by Frederick I of Prussia, who introduced a monopoly on publishing star catalogs in Prussia. In 1945 the Institute was moved by the Americans nearer to the United States Army Garrison Heidelberg. On January 1, 2005 the combined Center for Astronomy institute formed by combining ARI, with the Institute of Theoretical Astrophysics (', ITA) and the Landessternwarte Heidelberg-Königstuhl ("Heidelberg-Königstuhl State Observatory", LSW). The ARI has been responsible among other things for the Gliese catalog of nearby stars, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Heidelberg
Heidelberg University, officially the Ruprecht Karl University of Heidelberg (; ), is a public university, public research university in Heidelberg, Baden-Württemberg, Germany. Founded in 1386 on instruction of Pope Urban VI, Heidelberg is List of universities in Germany#Universities by date of establishment, Germany's oldest university and one of the List of oldest universities in continuous operation, world's oldest surviving universities; it was the third university established in the Holy Roman Empire after Charles University, Prague (1347) and University of Vienna, Vienna (1365). Since 1899, it has been a coeducational institution. Heidelberg is one of the most prestigious universities in Germany. It is a German Excellence Universities, German Excellence University, part of the U15 (German universities), U15, as well as a founding member of the League of European Research Universities and the Coimbra Group. The university consists of twelve Faculty (division), faculties and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gliese Catalogue Of Nearby Stars
The ''Gliese Catalogue of Nearby Stars'' (, English ) is a star catalogue listing stars located within 25 parsecs (82 ly) of the Sun. First edition and supplements In 1957, German astronomer Wilhelm Gliese published his first star catalogue of 915 known stars within of Earth, listing their known properties and ordered geographically by right ascension. Stars in the first catalogue are designated by coding ''GL NNN'', the N representing the consecutive integer number based on this order. Gliese published an update as the ''Catalogue of Nearby Stars'' in 1969, all known stars to , which catalogued 1,529 stars, encoded as ''Gl NNN.NA'' (prefix Gl and the entries of twelve years before gained a .0 affix; the more than 500 additional stars were recorded using interspersed 0.1, 0.2 etc. numbering). This list therefore numbered from 1.0 to 915.0 as no stars were entered after 915.0. and retained a strict right ascension order. A Supplement published in 1970 by Richard van ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Gliese
Wilhelm Gliese (, English ; 21 June 1915 – 12 June 1993) was a German astronomer who specialized in the study and cataloging of nearby stars. Life Gliese was born in Goldberg, now in Polish Silesia, the son of judge Wilhelm Gliese. He worked at the Astronomisches Rechen-Institut, first in Berlin and then in Heidelberg. While a student he was encouraged by the Dutch astronomer Peter van de Kamp to study nearby stars, which he did for the rest of his life. His astronomical research was interrupted during World War II when he was conscripted into the German ''Wehrmacht'' in 1942 and sent to the Eastern Front. In 1945, he was taken prisoner by the Soviets and was not released until 1949. He finally resumed his research at the Institute, which had been moved by the U.S. Army to Heidelberg after the war. Although he nominally retired in 1980, he continued his research at the Institute until his death in 1993. Catalogs of nearby stars He is best known for his '' Catalogu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hipparcos
''Hipparcos'' was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions and distances of celestial objects on the sky. This permitted the first high-precision measurements of the intrinsic brightnesses, proper motions, and parallaxes of stars, enabling better calculations of their distance and tangential velocity. When combined with radial velocity measurements from spectroscopy, astrophysicists were able to finally measure all six quantities needed to determine the motion of stars. The resulting ''Hipparcos Catalogue'', a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision ''Tycho Catalogue'' of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. ''Hipparcos'' follow-up mission, '' Gaia'', was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GJ 1061
GJ 1061 is a red dwarf star located from Earth in the southern constellation of Horologium. Even though it is a relatively nearby star, it has an apparent visual magnitude of about 13, so it can only be seen with at least a moderately-sized telescope. This star is a tiny, dim, red dwarf, close to the lower mass limit. It has an estimated mass of about 12.5% that of the Sun and is only about 0.2% as luminous. It is an old, slowly-rotating star, with an age of at least 7 billion years and a rotation period of about 125 days. The star displays no significant infrared excess due to circumstellar dust. It hosts a system of three known exoplanets. History of observations The proper motion of GJ 1061 has been known since 1974, but it was estimated to be further away: approximately distant based upon an estimated parallax of 0.130″. The RECONS accurately determined its distance in 1997. At that time, it was the 20th-nearest known star system to the Sun. The discovery tea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Journal
''The Astronomical Journal'' (often abbreviated ''AJ'' in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing. It is one of the premier journals for astronomy in the world. Until 2008, the journal was published by the University of Chicago Press on behalf of the AAS. The reasons for the change to the IOP were given by the society as the desire of the University of Chicago Press to revise its financial arrangement and their plans to change from the particular software that had been developed in-house. The other two publications of the society, the ''Astrophysical Journal'' and its supplement series, followed in January 2009. The journal was established in 1849 by Benjamin A. Gould. It ceased publication in 1861 due to the American Civil War, but resumed in 1885. Between 1909 and 1941 the journal was edited in Albany, New York. In 1941, editor Benjamin Boss arrange ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main-belt Asteroid
The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids or minor planets. The identified objects are of many sizes, but much smaller than planets, and, on average, are about one million kilometers (or six hundred thousand miles) apart. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System. The asteroid belt is the smallest and innermost circumstellar disc in the Solar System. Classes of small Solar System bodies in other regions are the near-Earth objects, the centaurs, the Kuiper belt objects, the scattered disc objects, the sednoids, and the Oort cloud objects. About 60% of the main belt mass is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
