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37021. Memorial Station (Pathfinder)
Sagan Memorial Station (Pathfinder) . This page contains some of the best images taken by Mars Pathfinder. ... Sojourner Gets Her Rock This "movie" was generated from 23 separate frames taken by the Imager for Mars Pathfinder (IMP) and lasts approximately 8 seconds. ... Sagan Memorial Station Images . ... Yogi Rock ( JPEG ) . Yogi, a rock taller than rover Sojourner, is the subject of this image, taken by the deployed Imager for Mars Pathfinder (IMP) on Sol 3. ... Couch Rock ( JPEG ) . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/pathfind.htm -- 8.3 Кб -- 15.03.1998
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37022. People
... English astronomer and mathematician. ... American astronomer. ... Bond, William Cranch 1789-1859 . ... At the observatory, he studied Saturn and (with William Lassell ) discovered its moon Hyperion . ... Polish astronomer who advanced the heliocentric theory that the earth and other planets revolve around the Sun. ... Galileo Galilei 1564-1642 . ... Van Allen discovered the Earth's radiation belts, which now bear his name, with an instrument aboard the first successful American satellite, Explorer...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/people.htm -- 15.4 Кб -- 15.03.1998
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37023. Terrestrial Impact Craters
... Terrestrial Impact Craters (This Page) . ... Views of Terrestrial Craters . ... On Earth, this transition diameter is 2 to 4 kilometers (1.2 to 2.5 miles) depending on target rock properties; on the Moon, at one-sixth Earth's gravity, the transition diameter is 15 to 20 kilometers (9 to 12 miles). ... Although it could be mistaken for the crater rim, the central ring of hills (5 kilometers or 3 miles diameter) results from differential erosion of the central uplift within this large complex crater. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/tercrate.htm -- 24.3 Кб -- 15.03.1998
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37024. Zond 5
... Launch Date: 1968-09-14 . ... Zond 5 was launched from a Tyazheliy Sputnik in Earth parking orbit to make scientific probes during a lunar flyby and to return to Earth. ... The closest distance was 1,950 kilometers (1,212 miles). High-quality photographs of the Earth were taken at a distance of 90,000 kilometers (56,000 miles). ... On September 21, 1968, the re-entry capsule entered the Earth's atmosphere, braked aerodynamically, and deployed parachutes at 7 kilometers (4.35 miles) . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/zond5.htm -- 3.7 Кб -- 15.03.1998
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37025. Apollo 14 Summary
Apollo 14 Summary . ... The Search for Cone Crater . ... Crew Alan B. Shepard, Jr., commander . ... Edgar D. Mitchell, lunar module pilot . Apollo 14 Animations . ... Shepard and Mitchell were out to collect bedrock samples from the rim of Cone and, in the process, to see how difficult it was to climb the hill. ... Shepard may have been thinking that he wouldn't have time for the little surprise he'd planned; and, certainly, he and Mitchell were annoyed that they hadn't found the rim of Cone. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/apo14.htm -- 26.1 Кб -- 15.03.1998
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37026. Asteroid Introduction
... Asteroid Introduction (This Page) . ... Asteroid Summary . Asteroids . Gaspra , Ida & Dactyl , Toutatis , Castalia , Vesta , Geographos, Mathilde . ... NEAR Spacecraft Homepage . Near-Earth Asteroid 3753 - Earth's Curious Companion . ... Then on October 1991 asteroid 951 Gaspra was visited by the Galileo spacecraft and became the first asteroid to have hi-resolution images taken of it. ... Both Gaspra and Ida are classified as S-type asteroids composed of metal-rich silicates. ... Gaspra . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/asteroid.htm -- 9.6 Кб -- 15.03.1998
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37027. Comet Introduction
... Comet Animation . ... Comet structures are diverse and very dynamic, but they all develop a surrounding cloud of diffuse material, called a coma, that usually grows in size and brightness as the comet approaches the Sun. ... As comets approach the Sun they develop enormous tails of luminous material that extend for millions of kilometers from the head, away from the Sun. ... The evaporated molecules boil off and carry small solid particles with them, forming the comet's coma of gas and dust. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/comet.htm -- 13.7 Кб -- 15.03.1998
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37028. Galileo to Jupiter
... Galileo Probe . The Galileo spacecraft was designed to study Jupiter's atmosphere, satellites, and surrounding magnetosphere for two years. ... From there, Galileo will spend more than five years traveling to Jupiter, where it will become the first spacecraft to make direct measurements from an instrumented probe within Jupiter's atmosphere. ... This image, taken by the Hubble Space Telescope, shows the predicted site at which the Galileo Probe will enter Jupiter's atmosphere on December 7, 1995. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/galileo.htm -- 11.7 Кб -- 15.03.1998
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37029. Giotto
... The Giotto Spacecraft . ... Nucleus . ... The goal was to come within 500 kilometers (310 miles) of Halley's comet at closest encounter. ... During the Halley encounter, Giotto crossed the bow shock at 1.15 million kilometers (715,000 miles) from the nucleus. ... On July 10, 1992, the Giotto spacecraft successfully completed its second close encounter with a cometary nucleus, when it passed within approximately 200 kilometers (124 miles) of Comet P/Grigg-Skjellerup at 15:30 UTC (ground receive time)...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/giotto.htm -- 19.9 Кб -- 15.03.1998
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37030. Hypothetical Planets
... Vulcan , the intra-Mercurial planet . Mercury's Moon . ... The Earth's Second Moon . The Moons of Mars . ... Flammarion suggested that the hypothetical planet probably moved at 45 AU. ... Pickering used a graphical analysis and suggested a "Planet O" at 51.9 AU with a period of 373.5 years, a mass twice the Earth's and a magnitude of 11.5-14. ... Powell suggested a planet with 2.9 Earth masses at 60.8 AU from the Sun, a period of 494 years, an inclination of 8.3? and only a small eccentricity. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/hypothet.htm -- 66.7 Кб -- 15.03.1998
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37031. Evidence of Primitive Life From Mars
Meteorite Yields Evidence of Primitive Life on Early Mars . A NASA research team of scientists at the Johnson Space Center and at Stanford University has found evidence that strongly suggests primitive life may have existed on Mars more than 3.6 billion years ago. ... The composition and location of PAHs organic molecules found in the meteorite also appeared to confirm that the possible evidence of life was extraterrestrial. ... Mars Life from Mars: The Discovery . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/marslif6.htm -- 13.1 Кб -- 15.03.1998
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37032. The Surface of Mars as Scene by Viking
The Surface of Mars . The summer of 1976 was filled with excitement for planetary scientists as the Viking landers touched down upon the surface of the red planet. ... Before Viking arrived at Mars, landing sites were chosen for both Viking landers, but after examining orbiter photographs, new sites were chosen. ... Lander 1 pictures showed a gently rolling landscape that is a yellow-brown in color with rocks of all sizes strewn through out the scene. ... Viking Lander Surface Photographs . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/marssurf.htm -- 12.8 Кб -- 15.03.1998
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37033. Near Earth Asteroid Rendezvous (NEAR)
... NASA Asteroid Orbiter . ... Launched on February 17, 1996, the Near Earth Asteroid Rendezvous (NEAR) mission is to be the first of NASA's Discovery missions, a series of small-scale spacecraft designed to proceed from development to flight in under three years for a cost of less than $150 million. ... The ultimate goal of the mission is to rendezvous with and achieve orbit around the near Earth asteroid 433 Eros in February, 1999, and study the asteroid for approximately one year. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/near.htm -- 4.3 Кб -- 15.03.1998
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37034. Neptune's Moon Nereid
Nereid . Neptune II . Nereid [NEER-ee-ed] was discovered in 1949 by astronomer Gerard Kuiper. Nereid is about 340 kilometers (210 miles) in diameter and is so far from Neptune that it requires 360 days to make one orbit. Voyager's best photos of Nereid were taken from about 4.7 million kilometers (2.9 million miles). ... Its distance to Neptune ranges from about 1,353,600 kilometers (841,100 miles) to 9,623,700 kilometers (5,980,200 miles). ... 1949 . ... Orbital period (days) . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/nereid.htm -- 4.8 Кб -- 15.03.1998
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37035. Pioneer 10 & 11
Pioneer 10 & 11 . USA Jupiter/Saturn Flyby & Interstellar Probe . ... Pioneer 10 was launched on 2 March 1972, on top of an Atlas/Centaur/TE364-4 launch vehicle. ... This made Pioneer the fastest manmade object to leave the Earth, fast enough to pass the Moon in 11 hours and to cross the Mars orbit, about 80 million kilometers away, in just 12 weeks. ... Following its encounter with Jupiter, Pioneer 10 is exploring the outer regions of our Solar System, studying energetic particles from our Sun . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/pn10-11.htm -- 11.7 Кб -- 15.03.1998
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37036. A Brief History of Rocketry
A Brief History of Rocketry . ... The earliest solid rocket fuel was a form of gunpowder, and the earliest recorded mention of gunpowder comes from China late in the third century before Christ. ... In 1946, von Braun and his team arrived at White Sands, N.M., where, for the first time, von Braun learned of work done by the American rocket pioneer Robert Goddard. ... Von Braun did. Three months after the demonstration flight, von Braun was engaged to work on liquid propelled rockets for the Army. ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/rocket.htm -- 29.9 Кб -- 15.03.1998
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37037. Saturn's Trojan Moons
Telesto & Calypso . Telesto [tah-LESS-toh] and Calypso [ka-LIP-so] are called the Tethys Trojans because they circle Saturn in the same orbit as Tethys , about 60 degrees ahead of and behind that body. Telesto is the leading Trojan and Calypso is the trailing Trojan. ... Telesto Statistics . ... Radius (km) . ... Radius (Earth = 1) . ... Mean density (gm/cm^3) . Mean distance from Saturn (km) . ... Rotational period (days) . Orbital period (days) . ... Mean orbital velocity (km/sec) . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/telesto.htm -- 5.9 Кб -- 15.03.1998
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37038. Jupiter's Moon Thebe
... These two images of the Jovian moon Thebe were taken by Galileo's solid state imaging system in November 1996 and June 1997, respectively. ... Thebe, whose longest dimension is approximately 116 kilometers (72 miles) across, is tidally locked so that the same side of the satellite always points towards Jupiter, similar to how the near side of our own Moon always points toward Earth. ... The image on the right emphasizes the side of Thebe that faces away from Jupiter (the "anti-Jupiter" side). ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/thebe.htm -- 8.4 Кб -- 15.03.1998
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37039. Uranus' Moon Umbriel
Umbriel . Uranus II . ... It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another. ... Orbital period (days) . ... Visual geometric albedo . ... This image is a polar stereographic projection of the southern hemisphere of Umbriel. ... Dark regions are represented as red and bright regions are represented as blue. The two white regions are bright ejecta from two fresh craters. ...
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37040. Venera 14 Descent Craft
Courtesy of NASA's National Space Science Data Center . Launch Date: 1981-11-04 . Venera 14 landed at 13? 15 minutes S by 310?, about 950 kilometers southwest of Venera 13. Surface temperature was 465?C and pressure was 94 Earth atmospheres. Venera 14 carried instruments to take chemical and isotopic measurements, monitored the spectrum of scattered sunlight, and recorded electric discharges during its descent phase through the Venusian atmosphere. ... Space History . ...
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Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/venera14.htm -- 3.3 Кб -- 15.03.1998
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