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Salyut 4
Salyut 4 (DOS 4) () was a Salyut space station launched on December 26, 1974 into an orbit with an apogee of 355 km, a perigee of 343 km and an orbital inclination of 51.6 degrees. It was essentially a copy of the DOS 3 (or Kosmos 557), and unlike its ill-fated sibling it was a complete success. Three crews attempted to make stays aboard Salyut 4 ( Soyuz 17 and Soyuz 18 docked; Soyuz 18a suffered a launch abort). The second stay was for 63 days duration, and an unmanned capsule, called Soyuz 20, remained docked to the station for three months, proving the system's long-term durability despite some deterioration of the environmental system during Soyuz 18's mission. Salyut 4 was deorbited February 2, 1977, and re-entered the Earth's atmosphere on February 3. Description Salyut 4 represented the second phase of DOS civilian space station. Although the basic design of Salyut 1 was retained, it switched to three large solar panels mounted on the forward module rather t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and is the effective successor to Greenwich Mean Time (GMT) in everyday usage and common applications. In specialised domains such as scientific research, navigation, and timekeeping, other standards such as Universal Time, UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French name, ''temps atomique international''), which is a weighted average of hundreds of atomic clocks worldwide. UTC is within about one second of mean solar time at 0° longitude, the currently used prime meridian, and is not adjusted for daylight saving time. The coordination of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salyut 1
Salyut 1 (), also known as DOS-1 (Durable Orbital Station 1), was the world's first space station. It was launched into low Earth orbit by the Soviet Union on April 19, 1971. The Salyut programme, ''Salyut'' program subsequently achieved five more successful launches of seven additional stations. The program's final module, Zvezda (ISS module), ''Zvezda'' (DOS-8), became the core of the Russian Orbital Segment of the International Space Station and remains in orbit today. Salyut 1 was adapted from an Almaz airframe and comprised five components: a transfer compartment, a main compartment, two auxiliary compartments, and the Orion (space telescope), Orion 1 Space Observatory. It was visited by the Soyuz 10 and Soyuz 11 missions. While the crew of Soyuz 10 was able to soft dock, the Docking and berthing of spacecraft#Docking states, hard-docking failed, forcing the crew to abort their mission. The Soyuz 11 crew successfully docked, spending 23 days aboard Salyut 1 conducting exper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vasily Lazarev
Vasily Grigoryevich Lazarev (; 23 February 1928 31 December 1990) was a Soviet cosmonaut who flew on the Soyuz 12 spaceflight as well as the abortive Soyuz 18a launch on 5 April 1975. He was injured by the high acceleration of the abort and landing and was initially denied his spaceflight bonus pay, having to appeal directly to Leonid Brezhnev to receive it. Brezhnev was at the time the General Secretary of the Communist Party of the Soviet Union. Lazarev held a degree in medicine and the rank of colonel in the Soviet Air Force. He remained in the space programme until failing a physical in 1981. He never fully recovered from the injuries sustained on Soyuz 18a and died on the last day of 1990 at the age of 62. He was awarded the title Hero of the Soviet Union, the title Pilot-Cosmonaut of the USSR and the Order of Lenin The Order of Lenin (, ) was an award named after Vladimir Lenin, the leader of the October Revolution. It was established by the Central Executive Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgi Grechko
Georgy Mikhaylovich Grechko (; 25 May 1931 – 8 April 2017) was a Soviet cosmonaut. He flew to space on three missions, each bound for rendezvous with a different Salyut space station.Умер космонавт Георгий Гречко tass.ru (8 April 2017) was the first crewed vehicle to visit , Soyuz 26 was the first crewed vehicle to visit , and |
Aleksei Gubarev
Aleksei Aleksandrovich Gubarev (; 29 March 1931 – 21 February 2015) was a Soviet cosmonaut who flew on two space flights: Soyuz 17 and Soyuz 28. Biography Gubarev graduated from the Soviet Naval Aviation School in 1952 and went on to serve with the Soviet Air Force. He undertook further studies at the Gagarin Air Force Academy before being accepted into the space programme. Gubarev was originally trained for the Soviet lunar programme and for military Soyuz flights before training for Salyut missions. His next mission, in 1978, was Soyuz 28, the first Interkosmos flight, where he was accompanied by Vladimír Remek from Czechoslovakia. In 1971, Gubarev became backup commander for the ill-fated Soyuz 11 mission, which killed the three-man crew when the craft depressurized in space. Gubarev resigned as a cosmonaut in 1981 and took up an administrative position at the Gagarin Cosmonaut Training Centre. In 1980s, he worked at the 30th Central Scientific Research Instit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of (). It remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 21.2 times the mass of the Sun and has been shown to be too small to be any known kind of normal star or other likely object besides a black hole. If so, the radius of its event horizon has "as upper bound to the linear dimension of the source region" of occasional X-ray bursts lasting only for about 1 ms. Cygnus X-1 belongs to a high-mass X-ray binary system, located about 7,000 light-years away, that includes a blue supergiant variable star designated HDE 226868, which it orbits at about 0.2 AU, or 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circinus X-1
Circinus X-1 is an X-ray binary star system that includes a neutron star. Observation of Circinus X-1 in July 2007 revealed the presence of X-ray jets normally found in black hole systems; it is the first of the sort to be discovered that displays this similarity to black holes. Circinus X-1 may be among the youngest X-ray binaries observed. Location, distance On June 14, 1969, an Aerobee 150 rocket, launched from Natal, Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil, obtained X-ray data during a scan of the Norma-Lupus-Circinus region that detected a well-isolated source at ℓ = 321.4±0.9° ''b'' = -0.5±2° (galactic), Right ascension, RA Declination, Dec within the constellation Circinus and referred to as Circinus XR-1 (Cir XR-1). The distance of Circinus X-1 was not well established, with a low estimate of 13,400 light years and high estimate of 26,000 light years. On June 23, 2015, an article published on NASA's Chandra X-ray Observatory, Chandra X-Ray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scorpius X-1
Scorpius X-1 is an X-ray source located roughly 9000 light years away in the constellation Scorpius. Scorpius X-1 was the first extrasolar X-ray source discovered, and, aside from the Sun, it is the strongest apparent non-transient source of X-rays in the sky. The X-ray flux varies day-to-day, and is associated with an optically visible star, V818 Scorpii, that has an apparent magnitude which fluctuates between 12-13. Discovery and early study The possible existence of cosmic soft X-rays was first proposed by Bruno Rossi, MIT professor and board chairman of American Science and Engineering in Cambridge, Massachusetts to Martin Annis, president of AS&E. Following his urging, the company obtained a contract from the United States Air Force to explore the lunar surface prior to the launch of astronauts to the Moon, and incidentally to perhaps see galactic sources of X-rays. Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pingvin Exercise Suit
The Pingvin exercise suit (also ''Penguin suit'') is a Russian anti-zero-G suit to be worn during spaceflight, designed to mimic the effects of gravity on the body, thus counteracting the loss of bone and muscle in weightlessness. The suit has elastic bands connected to a waistband that create tension between the waist and the feet and between the shoulders and the waist, thus creating a force for the body to work against. Cosmonauts reported the suit to be uncomfortable and prone to overheating. After ground tests in 1971 at Baikonur and in-orbit tests in 1975 on the Salyut 3, it was in use on the Mir, and routinely during long Soviet spaceflights from 1978 on. Variants Variant may refer to: Arts and entertainment * ''Variant'' (magazine), a former British cultural magazine * Variant cover, an issue of comic books with varying cover art * ''Variant'' (novel), a novel by Robison Wells * " The Variant", 2021 epis ... were developed for therapeutic use in people with movement probl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Full Width At Half Maximum
In a distribution, full width at half maximum (FWHM) is the difference between the two values of the independent variable at which the dependent variable is equal to half of its maximum value. In other words, it is the width of a spectrum curve measured between those points on the ''y''-axis which are half the maximum amplitude. Half width at half maximum (HWHM) is half of the FWHM if the function is symmetric. The term full duration at half maximum (FDHM) is preferred when the independent variable is time. FWHM is applied to such phenomena as the duration of pulse waveforms and the spectral width of sources used for optical communications and the resolution of spectrometers. The convention of "width" meaning "half maximum" is also widely used in signal processing to define bandwidth as "width of frequency range where less than half the signal's power is attenuated", i.e., the power is at least half the maximum. In signal processing terms, this is at most −3 dB of att ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slit Collimator
Slit or SLIT may refer to: Science and technology * Slit (protein), in genetics, the midline repellent signaling molecule * Slitting, a shearing operation that cuts a large roll of material into narrower rolls * Sublingual immunotherapy (SLIT), immunotherapy that involves putting allergen extracts under the tongue Other uses * Slit trench, a defensive fighting position in warfare * Slit Woods, a Site of Special Scientific Interest in County Durham, England * Arrowslit or loophole, a defensive slot in the wall of a building that allows archers to fire at invaders if the building is threatened See also * * * Slit experiment (other) * ''Caso Degollados'' ('Slit-Throat Case'), a Chilean politically-motivated series of murders * Slat (other) * Slot (other) Slot, the slot or Slots may refer to: People * Arne Slot (born 1978), Dutch football manager, former player * Gerrie Slot (born 1954), Dutch cyclist * Hanke Bruins Slot (born 1977), Dutch politic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attojoule
The joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). In terms of SI base units, one joule corresponds to one kilogram- metre squared per second squared One joule is equal to the amount of work done when a force of one newton displaces a body through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889). Definition According to the International Bureau of Weights and Measures the joule is defined as "the work done when the point of application of 1 MKS unit of force ewtonmoves a distance of 1 metre in the direction of the force." In terms of SI base units and in terms of SI derived units with special names, the joule is defined as One joule is also equivalent to any of the following: * The work required to move ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
