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Ankara University Kreiken Observatory
The Ankara University Observatory (AUG) (), is a Observatory#Ground-based observatories, ground-based astronomical observatory operated by the Astronomy and Space Sciences Department at Ankara University's Faculty of Science. Established in 1959 by Netherlands, Dutch astronomer Egbert Adriaan Kreiken in Ahlatlıbel, Ankara. Currently, it consists of nine optical telescopes and a radio telescope, which is currently taken out of service. Old instruments are displayed in a museum at the observatory. History Ankara University's Faculty of Science decided in 1954 to establish an observatory to begin with astronomical studies. Ahlatlıbel in Gölbaşı, Ankara was chosen as the ideal site, a location with dark skies far from the city's downtown to avoid the effects of light pollution, having an average 300 clear nights per year and also offering easy transportation from the campus. It is situated south of Ankara at an altitude of . Groundbreaking of the main building and the three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankara University
Ankara University () is a public university, public research university in Ankara, the capital of Turkey. It was the first higher education institution founded in Turkey after the History of the Republic of Turkey, formation of the Turkish republic in 1923. History Ankara University was established by Mustafa Kemal Atatürk, the first president of Turkey, and is one of the country’s leading educational institutions. The university's history dates back to the founding of the Faculty of Political Science, Ankara University, Faculty of Political Science in 1859, which was originally established in Istanbul as an institution to educate the Ottoman Empire's bureaucracy. The faculty underwent various transformations over time. Initially known as ''Mekteb-i Mülkiye-i Şahane'' under the Ministry of the Interior (Turkey), Turkish Ministry of the Interior, it was later renamed ''Mekteb-i Mülkiye'' in 1918 under the Ministry of National Education (Turkey), Turkish Ministry of Education ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photometer
A photometer is an instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum. Most photometers convert light into an electric current using a photoresistor, photodiode, or photomultiplier. Photometers measure: *Illuminance * Irradiance * Light absorption * Scattering of light * Reflection of light *Fluorescence *Phosphorescence * Luminescence Historically, photometry was done by estimation, comparing the luminous flux of a source with a standard source. By the 19th century, common photometers included Rumford's photometer, which compared the depths of shadows cast by different light sources, and Ritchie's photometer, which relied on equal illumination of surfaces. Another type was based on the extinction of shadows. Modern photometers utilize photoresistors, photodiodes or photomultipliers to detect light. Some models employ photon counting, measuring light by counting individual photons. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hürriyet Daily News
The ''Hürriyet Daily News'', formerly ''Hürriyet Daily News and Economic Review'' and ''Turkish Daily News'', is the oldest current English-language daily in Turkey, founded in 1961. The paper was bought by the Doğan Media Group in 2001 and has been under the media group's flagship ''Hürriyet'' from 2006; both papers were sold to Demirören Holding in 2018. Ideology ''Hürriyet Daily News'' has generally taken a secular and liberal or centre-left position on most political issues, in contrast to Turkey's other main English-language daily, the '' Daily Sabah'', which is closely aligned with the Justice and Development Party of Recep Tayyip Erdoğan Recep Tayyip Erdoğan (born 26 February 1954) is a Turkish politician who is the 12th and current president of Turkey since 2014. He previously served as the 25th prime minister of Turkey, prime minister from 2003 to 2014 as part of the Jus .... Another conservative competitor, the Gülen movement-run '' Today's Zam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun Spot
Sun SPOT (Sun Small Programmable Object Technology) was a sensor node for a wireless sensor network developed by Sun Microsystems announced in 2007. The device used the IEEE 802.15.4 standard for its networking, and unlike other available sensor nodes, used the Squawk virtual machine, Squawk Java virtual machine. After the acquisition of Sun Microsystems by Oracle Corporation, the SunSPOT platform was supported but its forum was shut down in 2012. A mirror of the old site is maintained for posterity. Hardware The completely assembled device fit in the palm of a hand. Its first processor board included an ARM architecture 32 bit CPU with ARM9, ARM920T core running at 180 MHz. It had 512 KB RAM and 4 MB flash memory. A 2.4 GHz IEEE 802.15.4 radio had an integrated antenna and a USB interface was included. A sensor board included a three-axis accelerometer (with 2G and 6G range settings), temperature sensor, light sensor, 8 tri-color LEDs, analog and dig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T15 Coude Teleskop Binası 3
T15 or T-15 may refer to: Aerospace * T15 (satellite), a DirecTV communications satellite * Marlin Airport, Texas, United States * Slingsby T.15 Gull III, a British glider * Soyuz T-15, a crewed spaceflight Automobiles * Chery T15, a Chinese concept car * Simca-Gordini T15, a French racing car * Triumph T15 Terrier, a motorcycle Railway stations * Minami-Sunamachi Station, Tokyo, Japan * Nangō-Jūsan-Chōme Station, Sapporo, Hokkaido, Japan * Nijō Station (Kyoto), Japan * Sanuki-Tsuda Station, Kagawa, Japan * Sekime-Takadono Station, Osaka, Japan * Yagoto Station, Nagoya, Aichi, Japan Weapons and armour * Safir T-15, a rifle * Škoda T-15, a prototype German-Czechoslovakian light tank * T-15 torpedo, a Soviet nuclear torpedo * T-15 Armata, a Russian infantry fighting vehicle * Vickers T-15 light tank, of the Belgian Army Other uses * T-15 (reactor), a Russian fusion research reactor * Estonian national road 15 * T15 road (Tanzania) * * Little Swanport language ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T15 Coude Teleskobu
T15 or T-15 may refer to: Aerospace * T15 (satellite), a DirecTV communications satellite * Marlin Airport, Texas, United States * Slingsby T.15 Gull III, a British glider * Soyuz T-15, a crewed spaceflight Automobiles * Chery T15, a Chinese concept car * Simca-Gordini T15, a French racing car * Triumph T15 Terrier, a motorcycle Railway stations * Minami-Sunamachi Station, Tokyo, Japan * Nangō-Jūsan-Chōme Station, Sapporo, Hokkaido, Japan * Nijō Station (Kyoto), Japan * Sanuki-Tsuda Station, Kagawa, Japan * Sekime-Takadono Station, Osaka, Japan * Yagoto Station, Nagoya, Aichi, Japan Weapons and armour * Safir T-15, a rifle * Škoda T-15, a prototype German-Czechoslovakian light tank * T-15 torpedo, a Soviet nuclear torpedo * T-15 Armata, a Russian infantry fighting vehicle * Vickers T-15 light tank, of the Belgian Army Other uses * T-15 (reactor), a Russian fusion research reactor * Estonian national road 15 * T15 road (Tanzania) * * Little Swanport la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maksutov Telescope
250px, A 150mm aperture Maksutov–Cassegrain telescope The Maksutov (also called a "Mak") is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly "spherically symmetrical". The negative lens is usually full diameter and placed at the entrance pupil of the telescope (commonly called a "corrector plate" or "meniscus corrector shell"). The design corrects the problems of off-axis aberrations such as coma found in reflecting telescopes while also correcting chromatic aberration. It was patented in 1941 by Soviet optician Dmitri Dmitrievich Maksutov. Maksutov based his design on the idea behind the Schmidt camera of using the spherical errors of a negative lens to correct the opposite errors in a spherical primary mirror. The design is most commonly seen in a Cassegrain variation, with an integrated secondary, that can use all-spherical elements, thereby simplifying ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T35 Teleskop Binası 2
{{Letter-Number Combination Disambiguation ...
T35 may refer to: Aviation * De Havilland DH.115 Vampire T.35, an American trainer aircraft * ENAER T-35 Pillán, a Chilean trainer aircraft * Guerchais-Roche T.35, a French monoplane * Slingsby T.35 Austral, a British glider * Temco T-35 Buckaroo, an American trainer aircraft * Wright T35, an American turboprop engine Other uses * T-35, a Soviet tank * T35 (classification), a disability sport classification * Bugatti Type 35, a French racing car * * Nagahara Station (Osaka), Japan * T35, a prototype for the American M10 tank destroyer The M10 tank destroyer, formally known as 3-inch gun motor carriage M10 or M10 BBC, was an American tank destroyer of World War II. After US entry into World War II and the formation of the Tank Destroyer Force, a suitable vehicle was needed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) changes systematically with time. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either: * ''Intrinsic variables'', whose luminosity actually changes periodically; for example, because the star swells and shrinks. * ''Extrinsic variables'', whose apparent changes in brightness are due to changes in the amount of their light that can reach Earth; for example, because the star has an orbiting companion that sometimes eclipses it. Many, possibly most, stars exhibit at least some oscillation in luminosity: the energy output of the Sun, for example, varies by about 0.1% over an 11-year solar cycle. Discovery An ancient Egyptian calendar of lucky and unlucky days composed some 3,200 years ago may be the oldest preserved historical document of the discovery of a variable star, the eclipsing binary Algol. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binary Star
A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved as separate stars using a telescope, in which case they are called ''visual binaries''. Many visual binaries have long orbital periods of several centuries or millennia and therefore have orbits which are uncertain or poorly known. They may also be detected by indirect techniques, such as spectroscopy (''spectroscopic binaries'') or astrometry (''astrometric binaries''). If a binary star happens to orbit in a plane along our line of sight, its components will eclipse and transit each other; these pairs are called ''eclipsing binaries'', or, together with other binaries that change brightness as they orbit, ''photometric binaries''. If components in binary star systems are close enough, they can gravitationally distort each other's outer stellar atmospheres. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photometry (astronomy)
In astronomy, photometry, from Greek '' photo-'' ("light") and '' -metry'' ("measure"), is a technique used in astronomy that is concerned with measuring the flux or intensity of light radiated by astronomical objects. This light is measured through a telescope using a photometer, often made using electronic devices such as a CCD photometer or a photoelectric photometer that converts light into an electric current by the photoelectric effect. When calibrated against standard stars (or other light sources) of known intensity and colour, photometers can measure the brightness or apparent magnitude of celestial objects. The methods used to perform photometry depend on the wavelength region under study. At its most basic, photometry is conducted by gathering light and passing it through specialized photometric optical bandpass filters, and then capturing and recording the light energy with a photosensitive instrument. Standard sets of passbands (called a photometric system) are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoelectric Effect
The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation such as ultraviolet light. Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, solid state, and quantum chemistry to draw inferences about the properties of atoms, molecules and solids. The effect has found use in electronic devices specialized for light detection and precisely timed electron emission. The experimental results disagree with classical electromagnetism, which predicts that continuous light waves transfer energy to electrons, which would then be emitted when they accumulate enough energy. An alteration in the intensity of light would theoretically change the kinetic energy of the emitted electrons, with sufficiently dim light resulting in a delayed emission. The experimental results instead show that electrons are dislodged only when the light exceeds a certain frequency—regardless of the ligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
