|
Tautenburg Observatory
The Karl Schwarzschild Observatory (german: Karl-Schwarzschild-Observatorium) is a German astronomical observatory in Tautenburg near Jena, Thuringia. It was founded in 1960 as an affiliated institute of the former German Academy of Sciences at Berlin and named in honour of the astronomer and physicist Karl Schwarzschild (1873–1916). In 1992, the institute was re-established as Thuringian State Observatory (''Thüringer Landessternwarte'', TLS). The observatory has the largest telescope located in Germany, which is also the largest Schmidt camera in the world. Made by VEB Zeiss Jena (the branch of Carl Zeiss located in Jena in what was then East Germany), this instrument is known as (2m) Alfred Jensch Telescope: though its mirror is 2 metres in diameter, the telescope's aperture is 1.34 m. The observatory has observed several exoplanets and brown dwarfs, as around the stars HD 8673, 30 Arietis, 4 Ursae Majoris, and around HD 13189 on 5 April 2005. The observatory also hos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl-Schwarzschild-Observatorium
The Karl Schwarzschild Observatory (german: Karl-Schwarzschild-Observatorium) is a German astronomical observatory in Tautenburg near Jena, Thuringia. It was founded in 1960 as an affiliated institute of the former German Academy of Sciences at Berlin and named in honour of the astronomer and physicist Karl Schwarzschild (1873–1916). In 1992, the institute was re-established as Thuringian State Observatory (''Thüringer Landessternwarte'', TLS). The observatory has the largest telescope located in Germany, which is also the largest Schmidt camera in the world. Made by VEB Zeiss Jena (the branch of Carl Zeiss located in Jena in what was then East Germany), this instrument is known as (2m) Alfred Jensch Telescope: though its mirror is 2 metres in diameter, the telescope's aperture is 1.34 m. The observatory has observed several exoplanets and brown dwarfs, as around the stars HD 8673, 30 Arietis, 4 Ursae Majoris, and around HD 13189 on 5 April 2005. The observatory also hos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, initially detected in 1988, was confirmed in 2003. There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of planets near the star; thus, 85% of the exoplanets detected are inside the tidal locking zone. In several cases, multiple planets have been observed around a star. About 1 in 5 Sun-like starsFor the purpose of this 1 in 5 statistic, "Sun-like" means G-type star. Data for Sun-like stars was not available so this statistic is an extrapolation from data about K-type stars. have an "Earth-sized"For the purpose of this 1 in 5 statistic, Earth-sized means 1–2 Earth radii. planet in the habitable zone. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Saale-Holzland-Kreis
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Observatories In Germany
Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, 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 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 Babylonians, Greeks, Indians, Egyptians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars. Nowadays, p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Astronomical Observatories
This is a list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location. The list also includes a final year of operation for many observatories that are no longer in operation. While other sciences, such as volcanology and meteorology, also use facilities called observatories for research and observations, this list is limited to observatories that are used to observe celestial objects. Astronomical observatories are mainly divided into four categories: space-based, airborne, ground-based, and underground-based. Many modern telescopes and observatories are located in space to observe astronomical objects in wavelengths of the electromagnetic spectrum that cannot penetrate the Earth's atmosphere (such as ultraviolet radiation, X-rays, and gamma rays) and are thus impossible to observe using ground-based telescopes. Being above the atmosphere, these space observatories can also avoid the effects of atmo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernhard Schmidt
Bernhard Woldemar Schmidt (, Naissaar, Nargen – 1 December 1935, Hamburg) was an Estonian optician. In 1930 he invented the Schmidt camera, Schmidt telescope which corrected for the optical errors of spherical aberration, coma, and astigmatism, making possible for the first time the construction of very large, wide-angled reflective cameras of short exposure time for astronomical research. Childhood Schmidt was the son of Carl Constantin and Marie Helene Christine ( Rosen) Schmidt. He was born and grew up on the island of Naissaar, Nargen (Naissaar), off the coast of Reval (Tallinn), Governorate of Estonia, Estonia, then part of the Russian Empire. The inhabitants of this island, mainly Estonian Swedes, generally spoke Swedish language, Swedish or Estonian language, Estonian, but the Schmidt family also spoke German language, German. Bernhard was the oldest of six children, three boys (one of whom died in infancy) and three girls. Naissaar was a small, rural island whose popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-Frequency Array (LOFAR)
The Low-Frequency Array, or LOFAR, is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European countries as of 2019. Originally designed and built by ASTRON, the Netherlands Institute for Radio Astronomy, it was first opened by queen Beatrix of The Netherlands in 2010, and has since been operated on behalf of the International LOFAR Telescope (ILT) partnership by ASTRON. LOFAR consists of a vast array of omnidirectional radio antennas using a modern concept, in which the signals from the separate antennas are not connected directly electrically to act as a single large antenna, as they are in most array antennas. Instead, the LOFAR dipole antennas (of two types) are distributed in stations, within which the antenna signals can be partly combined in analogue electronics, then digitised, then combined again across the full station. This step-wise approach provides great flexibility in setting and rapidly changing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Telescope
A radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio astronomy, which studies the radio frequency portion of the electromagnetic spectrum emitted by astronomical objects, just as optical telescopes are the main observing instrument used in traditional optical astronomy which studies the light wave portion of the spectrum coming from astronomical objects. Unlike optical telescopes, radio telescopes can be used in the daytime as well as at night. Since astronomical radio sources such as planets, stars, nebulas and galaxies are very far away, the radio waves coming from them are extremely weak, so radio telescopes require very large antennas to collect enough radio energy to study them, and extremely sensitive receiving equipment. Radio telescopes are typically large parabolic ("dish") antennas similar to those employed in tracking an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Interferometer
Interferometry is a technique which uses the ''interference'' of superimposed waves to extract information. Interferometry typically uses electromagnetic waves and is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to chemistry), quantum mechanics, nuclear and particle physics, plasma physics, remote sensing, biomolecular interactions, surface profiling, microfluidics, mechanical stress/strain measurement, velocimetry, optometry, and making holograms. Interferometers are devices that extract information from interference. They are widely used in science and industry for the measurement of microscopic displacements, refractive index changes and surface irregularities. In the case with most interferometers, light from a single source is split into two beams that travel in different optical paths, which are then combined again to produce inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 13189
HD 13189 is an 8th magnitude star in Triangulum constellation. In 2005, a planetary companion or brown dwarf was announced in orbit around this star. At the time, the parallax estimate was , which would suggest a distance of with a high margin of error. In 2007, van Leeuwen published a revised parallax measurement of , which corresponds to a distance of with a smaller but still significant margin of error. In 2022 the Gaia spacecraft measured a parallax of which is a distance of with an error of only . It has a spectral classification of K1II-III, making it a giant star that has evolved away from the main sequence. The mass is 1.2 times the Sun's, while measurements of the star's radius give estimates of . The atmosphere of the star displays short period radial velocity variations with a primary period of 4.89 days. This behavior is typical for giant K-type stars such as this and it is not the result of a close-orbit planetary companion. HD 13189 b HD 131 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4 Ursae Majoris
4 Ursae Majoris (sometimes abbreviated 4 Uma) is the Flamsteed designation of a star in the northern circumpolar constellation of Ursa Major. It also bears the Bayer designation of Pi2 Ursae Majoris (Pi2 UMa, π2 Ursae Majoris, π2 UMa) and is traditionally named Muscida. With an apparent visual magnitude of +4.6, this star is visible from suburban or darker skies based upon the Bortle Dark-Sky Scale. From parallax measurements made during the ''Hipparcos'' mission, this star is at a distance of from Earth. , one extrasolar planet has been confirmed to be orbiting the star. Properties This star has a stellar classification of K2 III, indicating that, at an estimated age of around four billion years, it is an evolved star that has reached the giant stage. It has a mass about 1.2 times larger than the Sun, but has expanded to 18 times the Sun's girth. The effective temperature of the star's outer atmosphere is . This heat gives it the cool, orange-h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
30 Arietis
30 Arietis (abbreviated 30 Ari) is a 6th- apparent-magnitude multiple star system in the constellation of Aries. ''30 Arietis'' is the Flamsteed designation. 30 Arietis A and B are separated by or about at a distance of 130 light years away. The main components of both systems are both binaries with a composite spectra belonging to F-type main-sequence stars, meaning they are fusing hydrogen in their cores. The 30 Arietis system is 910 million years old, one fifth the age of the Sun. Star system 30 Arietis A and B are separated by 38.1", corresponding to 1,500 AU at a distance of 130 light years. The pair are at almost the same distance, have very similar proper motions, and are considered almost certain to be gravitationally bound with a likely period around 34,000 years. The main components of both systems are both binaries with a composite spectra belonging to F-type main-sequence stars, meaning they are fusing hydrogen in their cores. 30 Arietis A is a spect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
