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Código:HR 520 ENE-DIC 1990 ST [Colección Mario Sotillo]
Ubicación:UCSP - Sucre
Autor Personal:Sky Publishing Corporation
TítuloSky and telescope
Ciudad: Cambridge, Mass.
Editorial: Sky Publishing Corporation
Año: 1990
Descripción:varias paginaciones; fots., ils. 29 cm.
Notas:F. I. 16/11/2016
Palabras Claves:ASTRONOMÍA;
;
Términos Locales:Astronomía - Revista;
Encabezados Geográficos:

Código:HR 520 ENE-DIC 1990 ST [Colección Mario Sotillo]
100:Sky Publishing Corporation
245Sky and telescope
260:Cambridge, Mass.: Sky Publishing Corporation: 1990:
300:varias paginaciones; fots., ils. 29 cm.
500:F. I. 16/11/2016
650:ASTRONOMÍA;
653Astronomía - Revista

Sky Publishing Corporation. Sky and telescope. -- . --Cambridge, Mass.: Sky Publishing Corporation: 1990. # Ingreso:1052433

   varias paginaciones; fots., ils..29 cm..

SKY AND TELESCOPE JANUARY 1990 VOL. 79, No. 1 A New Decade Dawns for Astronomy An interview with John N. Bahcall, whose National Academy of Sciences committee is charged with setting priorities for U. S. astronomy in the 1990s Echoes of the Supernova David Malin and David Allen Light from Supernova 1987A is revealing the detailed, three-dimensional structure of interstellar dust sheets in the Large Magellanic Cloud Faster Than Light? Eric Sheldon Some distant radio sources appear to be expanding faster than the speed of light! Are they really breaking Einsteins famous cosmic speed limit? How Amateurs Will Use HST Stephen James O Meara Five amateurs, given the chance of a lifetime, will use the Hubble Space Telescope to help unlock some of the secrets of the universe AMATEUR ASTRONOMERS Jupiters North Equatorial Belt erupts ASTRONOMICAL COMPUTING Make your own planetary grids BOOKS AND THE SKY Cosmic encounters CELESTIAL CALENDAR A roundup of sky events for 1990 50 AND 25 YEARS AGO FOCAL POINT A personal view of Voyagers triumph at Neptune GLEANINGS FOR ATMs Are you old enough to remember Mogeys? IMAGES The Gamma Cygni nebulosity LETTERS NEWS NOTES OBSERVERS PAGE The search for the ashen light RAMBLING THROUGH THE SKIES Now appearing: Venus and Jupiter S&T TEST REPORT Part 2 of an 8-inch showdown SKY-GAZERS ALMANAC 1990 Celestial events every night this year COVER: As the Suns activity continues to rise toward what some experts believe will be the greatest maximum on record (see page 116), spectacular displays of aurora are becoming more frequent. Scott Nielsen of Superior, Wisconsin, watched the northern lights for five consecutive nights beginning last October 19th. As the orange glow of dawn began to well up from the eastern horizon on the morning of the 20th, he photographed this spectacular this spectacular red auroral sheet with a 24-mm wide-angle lens. For more photos of celestial scenes taken by our readers turn to page 112. FEBRUARY 1990 VOL. 79, No. 2 Neptune and Triton: Worlds Apart The Magnificent spectacle of Neptune, its rings, and Triton has taken on new clarity after months of analysis by the Voyager science team Getting To Know Neptune J. Kelly Beatty Before Voyager 2s flyby of Neptune, astronomers were puzzled because they knew so little about the place. Now they know a lot more – but they are still puzzled. The Legacy of Photos 2 Stuart J. Goldman Contrary to popular belief, the Phobos mission to Mars was not a complete failure. Only now is its scientific bounty being revealed. AMATEUR ASTRONOMERS Children: astronomys greatest resource ASTRONOMICAL COMPUTING What is that mirrors wavefront error? ASTRONOMY EXPRESS Exciting new comet BACKYARD ASTRONOMY Tune in to forecasts of sunspots and auroras BOOKS AND THE SKY Back to basics CELESTIAL CALENDAR Planetary occultations for 1990 50 AND 25 YEARS AGO FOCAL POINT The wrong way to hustle stars GLEANINGS FOR ATMs How to test your own mirror LETTERS NEWS NOTES OBSERVERS PAGE A primer for video astronomy RAMBLING THROUGH THE SKIES Two beacons in the night SOUTHERN STARS COVER: Warned by summer sunlight, a fountain of nitrogen spurts high into the near-black sky of Neptunes satellite Triton. Nitrogen-methane ices tinge the frigid surface with blues and pinks, and in the foreground part of the polar cap has warned and slumped to reveal a network of subterranean caves. The big moon surprised planetary scientists during Voyager 2s flyby last August, sporting several gas-powered eruptions that rose as high as 8 kilometers. All this activity would seem unlikely on a world where sunlight is some 900 time weaker than here on Earth and the temperature hovers within a few dozen degrees of absolute zero. No less amazing was Neptune itself, where winds race up to 2200 km per hour and whose face is pocked with a huge, Earth-size vortex called the Great Dark Spot. Voyager 2 obtained more than 9000 images of Neptune, its rings, and its satellites; many of them, including the latest computer-processed versions, appear in a stunning portfolio that begins on page 136. And, as described on page 146, Neptune and Triton proved every bit as scientifically as they did visually. Painting by David A. Hardy. MARCH 1990 VOL. 79, No. 3 Matter-Antimatter Paul Davies Antimatter may hold the key to the origin of all matter in the universe Target Earth: It Will Happen David Morrison and Clark R. Chapman Sooner or later, our planet will take a direct hit from an asteroid or comet big enough to wreak global havoc Are Periodic Bombardments Real? Paul Weissman The idea that comet showers regularly wipe out most life on Earth seems headed for the same fate as the dinosaurs. A Hollow Asteroid David A. Pierce Finding asteroids that come perilously close to the Earth takes persistence and a bit of luck Waiting for Comet Austin John E. Bortle The Stage is set for what may be the best comet since West in 1976. AMATEUR ASTRONOMERS News from around the world ASTRONOMICAL COMPUTING Do Atlases show star brightness correctly? BOOKS AND THE SKY The golden age of space exploration CELESTIAL CALENDAR An evening crescent Moon occults the Pleiades 50 AND 25 YEARS AGO FOCAL POINT The Metaphysics of stargazing GLEANINGS FOR ATMs Two all-wood construction projects LETTERS The pros and cons of searching for E. T. NEWS NOTES OBSERVERS PAGE Canadas enduring astrophotographer RAMBLING THROUGH THE SKIES An anniversary for a cold world COVER: The collision of an asteroid even one kilometer in diameter would have horrible consequences for Earth. Slamming into the ground at tens of kilometers per second, the object generates shock waves with pressures millions of times that of the atmosphere at sea level. Rocks at ground zero and in the impactor itself become squeezed to one-third their normal volume and squirt outward in molten streams. All life within hundreds of kilometers is wiped out. Meanwhile mountain of debris shoot high into the atmosphere, and the entire globe is soon cloaked with a dense shroud of dust. Such cataclysmic scenarios are no longer the sole province of science-fiction writers, for many scientists believe that most terrestrial life came to an abrupt end 65 million years ago when an asteroid 10 km across crashed into Earth. Beginning on page 261, astronomers David Morrison and Clark Chapman discuss the inevitability of such meeting. On page 266 theorist Paul Weissman examines the evidence that comets rain down on us periodically, and on page 272 David Pierce introduces us to young asteroid hunters trying to snare (on photographs) maverick objects that pass near the Earth and may someday collide with it. Painting by Don Davis. APRIL 1990 VOL. 79, No. 4 HST: Astronomys Discovery Machine Richard Tresch Fienberg Nearly two decades and 1.5 billion in the making, the Hubble Space Telescope is the most ambitious and capable astronomical satellite ever built. Heres your guide to its nuts and bolts Delivering HST to Orbit Steven A. Hawley No one is worried more about HSTs arrival in orbit than the shuttle crew taking it there. This is the story of the deployment flight, as told by the astronomer-astronaut who will ever-so-gently toss HST into space. Hubble Space Telescope: The Mission Eric J. Chaisson and Ray Villard Never mind how big HST is – what will it do in orbit? AMATEUR ASTRONOMERS Amateur accomplishments of 1989 ASTRONOMICAL COMPUTING Paper models of comet orbits BAKCYARD ASTRONOMY A $5 telescope Galileo would have loved BOOKS AND THE SKY Automatic telescopes and observing handbooks CELESTIAL CALENDAR Where to see Comet Austin 50 AND 25 YEARS AGO FOCAL POINT The Hubble Space Telescope: NASAs white elephant? GLEANINGS FOR ATMs Aircraft landing gear makes a fine mount LETTERS Celestron vs. Meade: the companies and the users react NEWS NOTES OBSERVERS PAGE Finders offer more than a way to point your telescope RAMBLING THROUGH THE SKIES Unraveling constellation histories COVER: After more than a decade of construction and testing, the Hubble Space Telescope – the first of four space-based Great Observatories – will begin its work in April if launch and deployment go as planned. After being lifted out of Space Shuttle Discoverys payload bay, the telescope will first extend its solar panels and high-gain antennas, but it will not be released until its pinting systems are checked. Only then will the shuttles manipulator arm let HST go, as it has just done here. Three articles, beginning on pages 366, 373, and 378, preview the deployment of HST and its mission; contrasting opinions about the wisdom of building this telescope appear in Focal Point on pages 356 and 357. This painting by Scott Kahler was provided by Ball Aerospace Systems Group, courtesy Bernadette Stechman. MAYO 1990 VOL. 79, No. 5 Seeking the Origins of Cosmic Rays David H. Smith Astronomers journey to the bottom of the world to trace the origins of the highest-energy particles and radiation that reach the Earth The Real Berenices Hair Philip Mozel The constellation Coma Berenices has its origin in an historical event: an Egyptian queens sacrifice to her gods Comet Austin at Dawn Alan M. MacRobert Will it wont it? Everyone is waiting to see whether the comet becomes bright or fades away An Observers Guide to Great Comets John Bortle With Comet Austin making its debut in the morning sky, now is a good time to learn what do look for in the all-too-rare great comet. Astrometry from Earth and Space Jean Kovalevsky Nearly all astronomical knowledge relies, in part , on instruments that measure the positions of celestial objects to a tiny fraction of an arc second AMATEUR ASTRONOMERS The farmer astronomer ASTRONOMICAL COMPUTING How a satellite in low orbit precesses BOOKS AND THE SKY NASA, politics, and the space telescope CELESTIAL CALENDAR Pluto closest to Earth in 250 years 50 AND 25 YEARS AGO FOCAL POINT Amateur astronomy on a shoestring GLEANINGS FOR ATMs Astronomy at West Point LETTERS NEWS NOTES OBSERVERS PAGE The Corona Borealis galaxy cluster RAMBLING THROUGH THE SKIES Cometary expectations S&T TEST REPORT A next-generation computer-aided telescope SOUTHERN STARS COVER: The Andromeda galaxy, M31, has been known since antiquity. The 4th-century Roman poet Rufus Festus Avienus alluded to it, and the Persian astronomer al-Sufi called it a little cloud some 700 years before the invention of the telescope. Not surprisingly, it has become one of the most studied objects in the heavens. Estimated to contain more than 300 billion stars, it is not only the nearest spiral galaxy to the Milky Way but also one of the largest known. On June 14, 1988, Colorado amateur A. Neyle Solle, Jr., photographed M31 as it appeared about 2.4 million years ago – the time its light took to reach Earth. Two of M31s satellite galaxies are also visible in the field; M32 is the bright circular patch above center, while M110 is at lower left. Solle used his 24 ½-inch f/6.2 Schmidt-Cassegrain reflector built by Astro Works Corp, for the 115-minute exposure. The film was a 4-by-5-inch sheet of gas-hypered Fujichrome 100D, which was developed as a negative in Unicolor K-2 chemestry. More photographs by readers appear in Gallery, beginning on page 568 JUNE 1990 VOL. 79, No. 6 Astro: Observatory in a Shuttle William P. Blair and Theodore R. Gull A Space Shuttle mission dedicated to astronomy – complete with high-flying Dazzling Views from Europes NTT Richard Tresch Fienberg The European Southern Observatorys 3.58-meter New Technology Telescope is producing some of the sharperst ground-based astronomical images ever seen Probing the Primeval Fireball Joseph Silk NASAs Cosmic Background Explorer satellite is now in orbit and poised to provide important new insights into the early universe. The Mysterious SU UMa Stars Philip A. Charles After decades of frustration, astronomers are beginning to understand the complex behavior of these short-period cataclysmic variables AMATEUR ASTRONOMERS Observing below the Everglades ASTRONOMICAL COMPUTING A guide to astronomical software BACKYARD ASTRONOMY Star-hopping through Scorpius BOOKS AND THE SKY The scientific rationale for Space Telescope CELESTIAL CALENDAR Last chance for Comet Austin 50 AND 25 YEARS AGO FOCAL POINT The cult of the missing mass GLEANINGS FOR ATMs Building a 14-inch pocket scope INDEX TO VOLUME 79 LETTERS NEWS NOTES OBSERVERS PAGE An exciting time for Jupiter observers RAMBLING THROUGH THE SKIES Motions of the stars SOUTHERN STARS COVER: The European Southern Observatorys 3.58-meter New Technology Telescope (NTT), dedicated in February, is already proving that active optics, a carefully designed building, and an excellent mountaintop site make for superb astronomical views. This false-color CCD image of a 2-arc-minute field in the Large Magellanic Cloud shows the nebulous region around Supernova 1987A, the bright object toward lower left. Massimo Tarenghi made this 5-minute exposure in the red light of singly ionized nitrogen. The colors indicate subtle differences in the surface brightness of the gas filaments. North is to left. Inset: This close-up, also in false color, penetrates deep into the maelstrom around SN 1987A for a look at the gas ejected by the star in its earlier red-supergiant phase. The supernova itself as well as several nearby compassion stars have been removed by computer processing. The bright red oval and fainter loops constitute material blown off the star over a period of perhaps 100,000 years. Debris from the supernova explosion will ultimately overtake and destroy these gas shells. The large yellow area, spanning about 13 arc seconds, is light from the intense blast reflected by dust grians. More NTT images appear beginnings on page 596. Photographs courtesy the European Southern Observatory. JULY 1990 VOL. 80, No. 1 The Keck Telescopes Giant Eye Roger W. Sinnott Rapidly nearing completion atop Hawaiis Mauna Kea, it will be the worlds largest optical telescope – by far The Battle Against Light Pollution David L. Crawford and Tim B. Hunter Light pollution is swallowing our nighttime sky, ruining views for astronomers and the public. Heres how you can help minimize its impact. Hubble Space Telescope Takes Wing Richard Tresch Fienberg The Space Shuttle Discovery gave HST a magnificent ride into Earth orbit. But the telescopes first days in space were marred by a string of technical glitches Are Spiral Galaxies Heavy Smokers? Jonathan Davies, Michael Disney, and Steven Phillipps If dust clogs the disks of most spiral galaxies, there could be much more to these cosmic pinwheels than meets the eye AMATEUR ASTRONOMERS Opening astronomy to the blind ASTRONOMICAL COMPUTING The real way to measure positions on photos BOOKS AND THE SKY Neutrino astrophysics CELESTIAL CALENDAR A solar eclipse and Saturns moons 50 AND 25 YEARS AGO FOCAL POINT Light pollution: situation hopeless but not serious GLEANINGS FOR ATMs How to test a flat mirror with water LETTERS NEWS NOTES OBSERVERS PAGE An observers guide to summer nebulae RAMBLING THROUGH THE SKIES eclipse as prelude COVER: One of two giant bearings swings through the slit of the W. M. Keck Observatory dome, a dramatic moment last November in the 10-meter telescopes construction .Situated at 13,600 feet above sea level near the summit of Mauna Kea in Hawaii, this instrument will have a unique primary mirror formed from 36 separately polished hexagonal segments. When as few as nine of them are in place – a milestone expected within a few months – the Keck will surpass the Palomar 200-inch telescope in light-grasp. Five more segments will push it beyond the Soviet 6-meter reflector, making Keck the worlds largest optical telescope. The full complement of 36 mirror segment should be installed by the end of 1991. Photograph by Peter French. For more on this trailblazing telescope, a joint project of the University of California and the California Institute of Technology, turn to page 15. AUGUST 1990 VOL. 80, No. 2 Rosat and the X-Ray Universe J. Kelly Beatty Fresh X-ray images of the cosmos are on their way to waiting astronomers, thanks to a new international satellite launched in May Observing Mars in 1990-91 Donald C. Parker, Jeffrey D. Beish, and Carlos E. Hernandez The last good apparition of Mars until 2001 has begun. Heres how to make the most of observing the red planet this summer, fall, and winter The William Herschel Telescope Ian Ridpath British astronomers finally have access to a world-class telescope in the Northern Hemisphere far from the murky skies of their home islands. Hubble Telescope Sees First Light Richard Tresch Fienberg Much to astronomers delight, the first image from the Hubble Space Telescopes wide-field camera was even sharper than predicted. But the best is yet to come What Are Gamma-Ray Busters? Kevin Hurley Despite two decades of study, frustrated astronomers still don’t know where occasional blasts of cosmic high-energy radiation are coming from AMATEUR ASTRONOMERS Austin and his comet ASTRONOMICAL COMPUTING Honest Abe Lincoln and the Moon BOOKS AND THE SKY Hunting quarks and supernovae CELESTIAL CALENDAR Occultations of Jupiter and the Pleiades 50 AND 25 YEARS AGO FOCAL POINT Astronomy on the sidewalk GLEANINGS FOR ATMs Build your own radio telescope LETTERS NEWS NOTES OBSERVERS PAGE Young Moons, summer comets, and public astronomy RAMBLING THROUGH THE SKIES Summer globulars SOUTHERN STARS COVER: The Hubble Space Telescope (HST) began its 15-year voyager of discovery on April 24th with a flawless launch aboard the Space Shuttle Discovery. One day later astronaut Steven Hawley used the shuttles robot arm, seen reaching in from the right in this photograph, to lift the 13-meter-long, 11,600-kilogram telescope out of the cargo bay. Then, while Hawley and his four crewmates watched through the shuttles windows, controllers at NASAs Goddard Space Flight Center sent commands to unroll HSTs gold-colored solar-cell arrays and to swing its dish-shaped communication antennae into place. Here the first of two solar-cell wings is about three-fifths of the way out. Later problems nearly led to an emergency space walk, as described in last months issue. But soon HST was released to orbit separately 614 kilometers above the Earth. After 3 ½ weeks of testing its space legs, HST snapped a first light image on May 20th. For a look at this historic picture and what it says about HSTs early performance, see page 140. Photograph courtesy NASA SEPTEMBER 1990 VOL. 80, No. 3 A Universe of Bubbles and Voids Richard Tresch Fienberg A map of two million galaxies makes plain the frothy, large-scale structure of the cosmos. The largest galaxy chains may not spell doom for the Big Bang after all. Pulsars Today Sir Francis Graham-Smith Rapidly spinning, magnetized neutron stars exhibit bizarre physical conditions and processes unattainable in the laboratory. The Hobbled Space Telescope Richard Tresch Fienberg Astronomers are reeling from the news that the Hubble Space Telescopes scientific capabilities have been drastically reduced by badly flawed optics Mercury: The Forgotten Planet Robert G. Strom Other worlds have basked in the spotlight of scientific attention during the past several years, but much is still to be learned about the closest planet to the Sun. AMATEUR ASTRONOMERS Riverside philosophy ASTRONOMICAL COMPUTING Get your computer ready for Mars BACKYARD ASTRONOMY The subtleties of setting circles BOOKS AND THE SKY Time-Lifes Vogaye Through the Universe CELESTIAL CALENDAR Comet Levy: growing bright? 50 AND 25 YEARS AGO FOCAL POINT Pity the telescope widow GLEANING FOR ATMs Achieving optical excellence IMAGES Deep in the Gum nebula LETTERS NEWS NOTES OBSERVERS PAGE Stalking geostationary satellites with a camera RAMBLING THROUGH THE SKIES Full Moon fever S&T TEST REPORT A new CCD for amateurs is a boon to photographers Center SKY & TELESCOPES ASTRONOMY RESOURCE GUIDE COVER: At first glance the barren, crater-ravaged surface of Mercury resembles that of our Moon. However, the Suns closest planet has significant differences in topography and composition, as well as being 40 percent larger. More than 15 years have passed since Mariner 10 obtained our first and only closeup views of Mercury, Scientists hope to mount a return trip – perhaps placing a spacecraft in orbit around the planet – to further explore such mysteries as Mercurys formation and evolution and the structure of its interior, which are described in Robert Stroms article beginning on page 256. This photomosaic of 18 images was taken by Mariner 10 on March 29, 1974, from a distance of about 210,000 kilometers, six hours after closest approach. The original images 1-kilometer resolution is comparable to the best Earth-based views of the Moon. Courtesy NASA and the Jet Propulsion Laboratory. OCTOBER 1990 VOL. 80, No. 4 Space Telescope: Picking Up the Pieces Richard Tresch Fienberg While NASA and the Congress labor to discover how the Hubble Space Telescope ended up with badly flawed optics, project astronomers search for ways to accomplish as many of the missions early scientific goals as possible Queen of the Giant Storms Reta F. Beebe Is Jupiters Great Red Spot really a huge hurricane? Well Versed in Astronomy Kenneth Weitzenhoffer What have poets throughout the centuries had to say about astronomy? Spinning Through Curved Space-Time David H. Smith General relativity predicts an exotic magnetic aspect of gravity that will be tested by a new satellite dubbed Gravity Probe B. Bad News for Brown Dwarfs Richard Tresch Fienberg The Milky Way is supposedly teeming with objects that aren’t quite planets and aren’t quite stars, but astronomers still haven’t found one for sure An Adventurous Astronomer David S. Evans Jean-Charles Houzeau was a firebrand adventurer – and an astronomer The Solar-Neutrino Mystery Deepens David H. Smith A new twist in the Suns neutrino saga has theorists scratching their heads AMATEUR ASTRONOMERS Popular astronomy in an unlikely language ASTRONOMICAL COMPUTING What 32 years of star trails can tell BOOKS AND THE SKY Soviets in space CELESTIAL CALENDAR Planets through your camcorder 50 AND 25 YEARS AGO FOCAL POINT The Hubble Space Telescope: a public failure GLEANING FOR ATMs A finderscope that tune like a violin IMAGES Buried treasure of Cygnus LETTERS NEWS NOTES OBSERVERS PAGE A flea-market astrocamera RAMBLING THROUGH THE SKIES Phase phenomena SOUTHERN STARS COVER: NASA has always intended to dispatch astronauts to install new instruments on the Hubble Space Telescope. The need to do so has become quite urgent since the discovery that one of its mirrors has the wrong shape. The article beginning on page 352 describes the most promising fix: installing corrective optics on a mission now scheduled for 1993. Then, around 1996, another shuttle crew install NICMOS (the near-infrared camera and multiple-objective spectrometer), as depicted here. NICMOS will be built by Ball Aerospace Systems Group, whose staff artist B. Scott Kahler prepared this painting especially for Sky & Telescope. Courtesy Bernadette Stechman. NOVEMBER 1990 VOL. 80, No. 5 Twilight Time for the Fifth Force? Clifford M. Will The foundation of 20th-century physics were shaken when researchers thought they had discovery a fifth force in nature Getting to the Shadow Stephen James OMeara, William H. Bonney, and Stuart J. Goldman Fewer and fewer options remain for travelers to the 1991 total solar eclipse Rendezvous with s Star Gary L. Bennett European and American space scientists eagerly await the lunch of Ulysses, the long-delayed mission to study the Suns polar regions AMATEUR ASTRONOMERS The Legacy of William Tyler Olcott ASTRONOMICAL COMPUTING Is Hubble visible where you live? BOOKS AND THE SKY Astronomical research for amateurs CELESTIAL CALENDAR Discovery of a new Mira Variable 50 AND 25 YEARS AGO FOCAL POINT Ulysses mushroom cloud of controversy GLEANINGS FOR ATMs A long-cabin observatory IMAGES A portrait of the Earth as seen from space LETTERS NEWS NOTES OBSERVERS PAGE Deep-sky objects that do something RAMBLING THROUGH THE SKIES Playing planetary catch-up S&T TEST REPORT How good are commercial 10-inch mirrors? COVER: Here is the planet Earth as no human eye will ever see it: totally free of clouds and illuminated uniformly. Artist Tom Van Sant and computer-graphics expert Lloyd Van Warren created this composite map using a Stardent color-graphics supercomputer and images from NOAA weather satellites. It resolves surface feautures down to four kilometers across. Van Sant and his associates are producing naturally colored GeoSpheres, or reality globes, to help teach about changes in the environment and in the distribution of natural resources. Another view of the satellite map, showing our whole planet in a rectangular projection, appears on page 480 along with a detailed description of how it was constructed. Courtesy Tom Van Sant, Inc., and the GeoSphere project. DECEMBER 1990 VOL. 80, No. 6 Roger Ressmeyers Universe Tour the worlds major observatories and space centers, as seen through the eyes of an award-winning photographer A Star Is Born Rudolph E. Schild The birth of a star is one of the least-understood events in astronomy Magellan at Venus: First Results J. Kelly Beatty Although balky at first, the Magellan orbiter has begun to dazzle scientists with its radar imagery of Venus complex surface AMATEUR ASTRONOMERS Jupiters South Equatorial Belt returns ASTRONOMICAL COMPUTING Create your own spiral galaxies BACKYARD ASTRONOMY Star-hopping through the rich fields of Auriga BOOKS AND THE SKY Intelligent life in the universe CELESTIAL CALENDAR Looking for the moons of Mars 50 AND 25 YEARS AGO FOCAL POINT All astronomers should be educators GLEANINGS FOR ATMs Warning your dewcap INDEX TO VOLUME 80 LETTERS NEWS NOTES OBSERVERS PAGE Comet Levy, a Jupiter occultation, and more RAMBLING THROUGH THE SKIES Stellar name games SOUTHERN STARS COVER: When it comes to portraiture of the worlds great astronomical and space centers, no one approaches the success or completeness of photographer Roger Ressmeyer. Take, for example, this 1987 scene at the summit of Mauna Kea in Hawaii, in which delicately colored, circumpolar star trails frame the dome of the 3.6-meter Canada-France-Hawaii Telescope. His 2-hour exposure captured the feeble glow of late-evening twilight and a parade of headlights encircling the domes base. Moonlight illuminates the domes right (east) side. Ressmeyers assignments over two decades have taken him to a score of remote mountain peaks, launch complexes on four continents, and a host of other facilities. An eight-page pictorial from Ressmeyers book Space Places, beginning on page 592, showcases some of the highlights of his ongoing photographic odyssey.

Número Ingreso Código Base de Datos Ubicación Tipo # Ej. Status Devolución Reserva
1052433HR 520 ENE-DIC 1990 ST  Colección Mario Sotillo UCSP - Sucre Original 1Disponible  

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