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На этой странице приведены все страницы сервера www.cosmos.ru ,которые мы индексируем. Показаны документы 1901 - 1920 из 10690.
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1901. Spacecraft that Explore Distant Space
... Spacecraft . ... To space by cannon? Finally, the deep space explorers --spacecraft which break away from the Earth's gravity . ... The "Luna" series of the USSR conducted 7 soft landing of unmanned probes, two of them with wheeled robotic "Lunokhods," and two of those missions returned samples to Earth. Others spacecraft have visited the major planets of the Solar system. ... The Mariner series have explored Venus and Mars--and Mariner 10 even reached Mercury, for three separate encounters! ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Satell6.htm -- 11.2 Кб -- 22.12.2007
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1902. Satellites with commercial missions
... 29a. Satellite looking up . ... 29e. Explorers of distant space . Space Index . This groups includes about 200 communication satellites ("comsats") scattered in synchronous orbits above the Earth's equator. ... 6 Earth radii (42,000 km or 26,000 miles), these satellite make one orbit per day, ( sidereal day of 23 h 56 min--see here ) and therefore as the Earth turns, they always stay above the same ground station. ... Next Satellite Class: #29e Missions to Planets and to Distant Space . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Satell5.htm -- 7.4 Кб -- 22.12.2007
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1903. Spacecraft Observing Earth's Space Environment
... Spacecraft . 29a. Satellite looking up . ... 29e. Explorers of distant space . Space Index . ... Many "down-looking" satellites also carry out local observations, among them Polar, Viking, Freja and satellites of the GOES and DMSP series. ... Other explorers of the distant magnetosphere have included the three ISEE spacecraft (International Sun-Earth Explorers), Polar in an elliptical polar orbit with cameras observing the polar aurora, and Image observing energetic neutral atoms. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Satell4.htm -- 6.9 Кб -- 22.12.2007
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1904. Satellites which look down and observe Earth
... 29a. Satellite looking up . 29c. Satellites probing around . ... The US Air Force furthermore sponsors polar satellites of the DMSP series, scanning the cloud cover of the polar region and also studying ions and electrons of the magnetosphere. ... The Canadian satellite Alouette in 1962 bounced radio signals off the top of the ionosphere, and UARS (Upper Atmosphere Research Satellite) has studied the Earth atmosphere. ... Next Satellite Class: #29c Those observing local conditions . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Satell3.htm -- 6.9 Кб -- 22.12.2007
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1905. Spacecraft Observing the Sun and the Heavens above
... Spacecraft . 29b. Satellites looking down . ... 29e. Explorers of distant space . ... The Hubble orbiting telescope. ... The Hubble telescope , in low Earth orbit, overcomes such limitations, in the visible range and in part of the UV. ... So fruitful was this observation that a second "deep field" exposure of such length, near the southern pole of the heavens, was recently conducted. ... Some satellites specialize in observing the Sun, such as the Japanese Yohkoh and NASA's SOHO . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Satell2.htm -- 7.9 Кб -- 22.12.2007
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1906. Oertsted and Ampere
... The Magnetic Sun . ... Magnetic Planets . ... He planned to demonstrate the heating of a wire by an electric current, and also to carry out demonstrations of magnetism, for which he provided a compass needle mounted on a wooden stand. ... Andre-Marie Amp?re in France felt that if a current in a wire exerted a magnetic force on a compass needle, two such wires also should interact magnetically. ... For two straight wires, the final result is as above--a force inversely proportional to R, not to R 2 ]...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/oersted.htm -- 12.8 Кб -- 22.12.2007
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1907. The Dynamo Process
... A dynamo (or electric generator) is a device converting . ... Faraday discovered that by moving a magnet next to a closed electric circuit, or changing the magnetic field passing through it, an electric current could be "induced" to flow in it. ... Faraday's disk dynamo Faraday showed that another way of inducing the current was to move the electric conductor while the magnetic source stood still. ... Faraday's disk dynamo needs a magnetic field in order to produce an electric current. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/dynamos.htm -- 9.8 Кб -- 22.12.2007
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1908. Review of "De Magnete"
... Review Article . ... On the Magnet" by William Gilbert of Colchester . ... of the magnetic Earth . ... Faced with the uncanny ability of the compass needle to point northward (eminently useful, too!) ... His studies involved both naturally found magnets--"loadstones" or "lodestones"--and artificially magnetized iron. He also fully understood induced magnetism, the fact that a piece of non-magnetic iron temporarily took on all properties of a permanent magnet when placed next to one. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/DMGRev2.htm -- 17.2 Кб -- 22.12.2007
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1909. http://www.cosmos.ru/mirrors/stern/stargaze/Sunopen.htm
... This page introduces the section on the Sun in "From Stargazers to Starships"; for an older, longer introduction (especially for teachers), click here . ... To geophysics, it is the source of our climate and weather , subjects discussed in some detail in the first 3 sections, covering ways our atmosphere receives and loses heat, the greenhouse effect, global circulation of winds, thunderstorms and much more. ... Finally, to understand the Sun's energy source, some nuclear physics must be brought in....
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Sunopen.htm -- 9.0 Кб -- 22.12.2007
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1910. http://www.cosmos.ru/mirrors/stern/stargaze/Sastron.htm
... Sun index . ... After that the site tells how the spherical shape of the Earth was recognized and measured, leading to the formula for the distance of the horizon, the concept of parallax and the ways the ancient Greeks estimated the distance of the Moon. ... The section ends with a fairly detailed discussion of Kepler's laws and planetary orbits, which serves as a bridge to the next section, on Newtonian Mechanics. ... The Moon: the Distant View . ... 4b. Optional: Libration of the Moon . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Sastron.htm -- 8.5 Кб -- 22.12.2007
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1911. FAQ: "The Great Magnet, the Earth"
... Listed below are questions submitted by users of "The Great Magnet, the Earth" and the answers given to them. ... In "The Exploration of the Earth's magnetosphere" on the magnetic environment of the Earth in space (a few Q duplicated here) . ... 11) Magnetic Shielding . ... 51) Can electricity be generated from the Earth's magnetic field? ... 9) Measuring Earth's magnetic field . ... 6) Reversals of the Earth's field (4 queries) . ... 42) Could generated electricity affect Earth's magnetic field? ...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/mgQsubj.htm -- 14.6 Кб -- 22.12.2007
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1912. Zum 400j hrigen Jubil um von De Magnete
Deutsche Bearbeitung von Sven Friedel . ... Vor etwa vierhundert Jahren, Jahre 1600, ver ffentlichte William Gilbert, der sp tere Leibarzt von K nigin Elizabeth I von England, seine gro e Studie ber den Magnetismus, "De Magnete" - " ber den Magneten" . ... De Magnete" leitete die ra der modernen Physik und Astronomie ein und und f hrte in ein neues Jahrhundert, das gepr gt war von den gro en Leistungen bedeutender Naturforscher wie Galileo, Kepler, Newton und anderer. ... Gau und das Erdmagnetfeld . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/Dmagint.htm -- 8.8 Кб -- 22.12.2007
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1913. El Reloj de Sol
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Mdial2.htm -- 1.4 Кб -- 22.12.2007
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1914. Explaining the Sundial
... Cada momento del d a tiene su l nea, marque donde est el Sol en ese momento . ... En verano , en el momento escogido, el Sol est alto en el cielo: en el punto S, mientras que en invierno , est bajo: en el punto W. La sombra del nom n est siempre en el plano que contiene al Sol y los puntos A y B. Si AB es una l nea fina, la sombra tambi n ser una l nea fina, la intersecci n de este plano con la base del reloj. ... Suponga que el puntero tiene una direcci n diferente , fuera del plano del papel. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Mdial1.htm -- 5.3 Кб -- 22.12.2007
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1915. Una meridiana di cartone
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Idial2.htm -- 1.3 Кб -- 22.12.2007
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1916. Explaining the Sundial
... At the summer date, at the chosen time, the Sun is high in the sky. at point S, while at the winter date, it is low in the sky, at point W. The shadow of the gnomon is always in the plane containing the Sun and the points A and B. If AB is a thin line, the shadow will also be a thin line, the intersection of this plane with the base of the sundial. ... Summer or winter, the shadow is therefore along the same line, the intersection of the above plane and the base of the sundial. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Idial1.htm -- 4.6 Кб -- 22.12.2007
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1917. Tycho Brahe
... An article about Tycho and several pictures of him . ... Probably pretty bad: daily showers were still a few centuries off.. ... A tidbit: Rosencrantz and Guildenstern, the Danish courtiers in Shakespeare's "Hamlet" (and in Tom Stoppard's play " Rosencrantz and Guildenstern are dead") probably got their names from two relatives of Tycho who visited England in 1592 on a diplomatic mission, Frederick Rosenkrantz, 3rd cousin of Tycho, and Knut Gyldenstierne, also a cousin. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Itycho.htm -- 3.9 Кб -- 22.12.2007
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1918. Tycho Brahe
... An article about Tycho and several pictures of him . ... Probably pretty bad: daily showers were still a few centuries off.. ... A tidbit: Rosencrantz and Guildenstern, the Danish courtiers in Shakespeare's "Hamlet" (and in Tom Stoppard's play " Rosencrantz and Guildenstern are dead") probably got their names from two relatives of Tycho who visited England in 1592 on a diplomatic mission, Frederick Rosenkrantz, 3rd cousin of Tycho, and Knut Gyldenstierne, also a cousin. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Stycho.htm -- 3.9 Кб -- 22.12.2007
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1919. http://www.cosmos.ru/mirrors/stern/stargaze/SGbull.htm
... After 1945, Wernher von Braun made a successful transition to American patronage and, eventually, to civilian space exploration. ... It was the great dream of Bull's life to fire cannon projectiles from the earth's surface directly into outer space. ... In 1961, Bull established Project HARP (High Altitude Research Project). ... Bull's Space Research Corporation was manufacturing the necessary long-range shells in Canada, but his lack of American citizenship was a hindrance in the Pentagon arms...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/SGbull.htm -- 18.7 Кб -- 22.12.2007
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1920. The Brightest Moon
... Since moonshine is really reflected sunlight, the full Moon is on the average slightly brighter in mid-winter, when Earth is closest to the Sun. In addition, the distance of the full Moon also varies, due to the ellipticity ("eccentricity") of the Moon's orbit. On 22 December, 1999, the two effects combined to produce the brightest full Moon of the century. ... This year will be the first full moon to occur on the winter solstice, Dec. 22nd, commonly called the first day of winter. ...
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Ссылки http://www.cosmos.ru/mirrors/stern/stargaze/Imoon3.htm -- 4.9 Кб -- 22.12.2007
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