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Código:HR 520 ENE-DIC 1988 ST [Colección Mario Sotillo]
Ubicación:UCSP - Sucre
Autor Personal:Sky Publishing Corporation
TítuloSky and telescope
Ciudad: Cambridge, Mass.
Editorial: Sky Publishing Corporation
Año: 1988
Descripción:varias paginaciones; fots., ils., gráfs. 29 cm.
Notas:F. I. 15/11/2016 Incluye Deep Sky (Spring 1988 22)
Palabras Claves:ASTRONOMÍA;
;
Términos Locales:Astronomía - Revista;
Encabezados Geográficos:

Código:HR 520 ENE-DIC 1988 ST [Colección Mario Sotillo]
100:Sky Publishing Corporation
245Sky and telescope
260:Cambridge, Mass.: Sky Publishing Corporation: 1988:
300:varias paginaciones; fots., ils., gráfs. 29 cm.
500:F. I. 15/11/2016 Incluye Deep Sky (Spring 1988 22)
650:ASTRONOMÍA;
653Astronomía - Revista

Sky Publishing Corporation. Sky and telescope. -- . --Cambridge, Mass.: Sky Publishing Corporation: 1988. # Ingreso:1052387

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

SKY & TELESCOPE January 1988 VOL. 75, No. 1 Epsilon Aurigae: Puzzle Solved? Alan MacRobert New light on a long-mysterious star. Diversity among Galaxy Clusters M. F. Struble and H. J. Rood Classifying these gigantic systems by visual appearance yields valuable clues about their structure and evolution. The Extragalactic Exist? Jeffrey McClintock Theory says they should, and observations suggest they do, but astronomers still don’t know for sure AMATEUR ASTRONOMERS Working together in astronomy ASTRONOMICAL COMPUTING How to half-step a stepper motor BOOKS AND THE SKY Quasars, redshifts, and controversies CELESTIAL CALENDAR Solar system events this month and for the year 50 AND 25 YEARS AGO FOCAL POINT Where are all the women amateaur astronomers? GLEANINGS FOR ATMs A 17 ½-inch Dobsonian done right IMAGES A close look at the Moons brightest crater LETTERS NEWS NOTES OBSERVERS PAGE A rich galaxy cluster awaits in Januarys evening sky RAMBLING THROUGH THE SKIES The Belt of Orion S&T TEST REPORT SureSharp, a simple device for focusing astrophotos SKY-GAZERS ALMANAC 1988 Celestial events night this year COVER: If this picture shows what it seems to show, we may have to abandon much of our modern view of cosmology. The quasar Markarian 205 is apparently attached to the spiral galaxy NGC 4319. If the objects redshifts are due to the Doppler effect, then the quasars spectrum indicates a recession velocity of 21,000 kilometers per second, but the galaxy is receding only 1,700 km per second. How could objects with such different redshifts – and distances, in the conventional view – be physically connected? Halton C. Arp has found evidence that the galaxy ejected the quasar, implying that a significant part of latters redshift is noncosmological. Jack W. Sulentics contrast-enhanced false-color picture shows distinctly the luminous connecting bridge. For more on this controversial topic and a review of Arps book, Quasars, Redshifts, and Controversies, see page 38. Photograph courtesy Halton C. Arp. Febrary 1988 VOL. 75, No. 2 Happy Birthday, Supernova! Ronald A. Schorn One year after it burst into view, the astronomical event of a lifetime is slowly yielding up its secrets How Far Are the Hyades? Paul Hodge The answer is crucial to gauging the size of the entire universe SETI: The search Heats Up Donald Goldsmith Scientists engaged in the search for extraterrestrial intelligence (SETI) have never been busier, but the big prize may still be a long way off Coloring the Electronic Sky Rudolph E. Schild Thanks to new technology, astronomers are now able to create color images of very faint objects Extraordinary Spectral Types James B. Kaler A wide variety of stars cant be pigeonholed into any of the usual spectral clases A Window on Our Galaxys Core Robin M. Catchpole Near-infrared photographs penetrate to the Milky Ways heart AMATEUR ASTRONOMERS U. S. and international news ASTRONOMICAL COMPUTING Galileo and Uranus BOOKS AND THE SKY Atlas of Galactic Nebulae, Part II CELESTIAL CALENDAR An ideal Pleiades occultation 50 AND 25 YEARS AGO FOCAL POINT Preserving the back side of the Moon for radio astronomy GLEANINGS FOR ATMs Variations on the barn-door theme LETTERS NEWS NOTES OBSERVERS PAGE Comet Bradfield and a solar eclipse RAMBLING THROUGH THE SKIES Taking a Sirius look S&T TEST REPORT The Telrad telescope sight SOUTHERN STARS COVER: The Omega nebula (M17) is a cloud of ionized hydrogen in Sagitarius, revealed here in a composite image made from data obtained at blue-green, red, and near-infrared wavelengths with a charge-coupled device, or CCD. The inclusion of near-infrared observations enables us to penetrate obscuring clouds in the foreground and see the hot, young stars that power the nebula. Here they appear hightly reddened by dust. The use of infrared data also tinges the nebulosity green because the bright hydrogen-alpha emission at 6563 angstroms gets reproduced in the composite green band. On page 144 Rudolph Schild explain in detail how this image was made and how solid-state cameras are revolutionizing our ability to see the universe in color. March 1988 VOL. 75, No. 3 The Ashen Light of Venus J. L. Phillips and C. T. Russell Is the night-side luster of this shrouded world fact or fancy? You may be able to help provide the answer this year A Phantom in Messier 31 Brian G. Marsden The spurious supernova had a big impact on some astronomers Infrared Astronomys New Image Ian S. McLean New cameras that take electronic pictures of the infrared sky are making important contributions in many areas of research Fleet Messengers from the Cosmos David J. Helfand Cosmic rays are samples of matter reaching us at nearly the speed of light from distant regions of the Milky Way and beyond The Baron and His Celestial Police Clifford J. Cunningham A Hungarian nobleman launched the earliest astronomical journals and hunted for the missing planet between Mars and Jupiter AMATEUR ASTRONOMERS The Philippine Astronomical Society ASTRONOMICAL COMPUTING Setting circles from a dot-matrix printer BACKYARD ASTRONOMY Collimating a Newtonian reflector: doing it right BOOKS AND THE SKY Meteorite craters and Coon Mountain controversies CELESTIAL CALENDAR A springtime quasar and Seyfert galaxy 50 AND 25 YEARS AGO FOCAL POINT Astronomys reigning CATs AND DOGs GALLERY A New feature showcases pictures by readers GLEANINGS FOR ATMs Off-axis optics and an astrometric observatory IMAGES The Rossette nebula – one of the skys showpieces LETTERS NEWS NOTES OBSERVERS PAGE A springtime galaxy cluster offers something for everyone RAMBLING THROUGH THE SKIES Shedding light on magnitudes S&T TEST REPORT Three telescope collimating tools COVER: One of the youngest impact craters on Earth, Meteor Crater near Flagstaff, Arizona, formed some 25,000 to 50,000 years ago when an iron mass struck flat-lying sedimentary rocks at a speed of more than 7 miles per second, releasing between 5 and 20 megatons of kinetic energy. The crater is roughly three quarters of a mile across, 700 feet deep, and somewhat squarish when seen from above. In the early part of this century, mining entrepreneur Daniel Moreau Barringer made several excavations in search of the iron meteoroid, which had dispersed on impact. For more about this tale and other quests for the craters origin, see the book review on page 274. The photograph was taken by U. S. Geological Survey scientists David J. Roddy and Karl Zeller April 1988 VOL. 75, No. 4 Cosmos on Parade J. Kelly Beatty Visitors to Moscow encounter frequent reminders that the Soviet Union is proud os its space program The sky in stereo William H. Bonney It is possible to see the skys third dimension: depth. The tools you need to do this are surprisingly simple Exploring Mars in 1988 Jeff D. Beish and Donald C. Parker Get ready for one of the best Mars apparitions of the 20th century The Extragalactic Zoo – II Ronald A. Schorn Extragalactic radio sources show only a limited variety of distinct shapes Otto Struve: Scientist and Humanist Vladimir Kourganoff Last of a long line of distinguished astronomers, Struve played a large role in the rise of modern astrophysics during his unusual career. AMATEUR ASTRONOMERS Tales from the 6th grade ASTRONOMICAL COMPUTING Simulating a mountains shadow BACKYARD ASTRONOMY How to collimate your non-Newtonian telescope BOOKS AND THE SKY Starlight; Sun and Earth CELESTIAL CALENDAR Get started in astronomical drawing 50 AND 25 YEARS AGO FOCAL POINT Martian canals: is Lowell vindicated? GALLERY GLEANINGS FOR ATMs A lensless-Wright camera IMAGES A continent in the sky LETTERS NEWS NOTES OBSERVERS PAGE Tips from an Australian astrophotography expedition RAMBLING THROUGH THE SKIES Asterisms Reys way SOUTHERN STARS COVER: The crescent Moon and Venus have been forming striking conjunctions each month since December. On April 19th and May 17th they will again draw close together in the evening sky. When this photograph was taken on January 21st the centers of the Moon and Venus were just 1.6° apart on the sky, though Venus was 500 times farther away in space. This Sky & Telescope photograph by William H. Bonney is a composite of two transparencies. The image of the conjunction was taken with a 200-mm telephoto lens on Kodachrome 64 film exposed dor about eight seconds. May 1988 VOL. 75, No. 5 U. S. Astronomy in Crisis Alan MacRobert Changes in federal policy threaten to close telescopes and reduce the United States to second-rate status in astronomy Europes Astronomy Machine Richard M. West By its decision to built the worlds largest telescope, the European Southern Observatory caps its first 25 years as one of the worlds premier astronomical institutions Journeys on the H-R Diagram James B. Kaler Stars change dramatically as they age, taking on an amazing variety of characters Rebirth of a Glass Giant Doug Gegen Mothballed for nearly a quarter century, a classic 23-inch refractor gets a make-over, and a new life Of Gravitys Lens and a Flys Eye Richard Tresch Fienberg When it comes to forming images using gravity, a galaxy may act less like a simple lens and more like an insects compound eye. AMATEUR ASTRONOMERS Dark desert highways ASTRONOMICAL COMPUTING A low-cost video frame grabber BOOKS AND THE SKY The search for the edge of the universe CELESTIAL CALENDAR A Mars observers guide 50 AND 25 YEARS AGO FOCAL POINT You re an astronomer? Whats your sign? GALLERY GLEANINGS FOR ATMs A Hula-Hoop dome and fun with a CCD LETTERS NEWS NOTES OBSERVERS PAGE A man who has inspired generations of astrophotographers RAMBLING THROUGH THE SKIES Twilight – starring Mercury and Venus S&T TEST REPORT The real lowdown on todays low-power eyepieces COVER: Ultraviolet radiation from the open star cluster NGC 6193 in Ara powers the output of the surrounding emission nebula, NGC 6188. Remnants of the giant molecular cloud from which the cluster formed are still visible as the dark rifts on the western (right) side of the nebula. This composite image consists of three plates taken with different color filters at the European Southern Observatorys 3.6-meter telescope. On page 471 Richard West describes ESOs first 25 years and bold plans for its second quarter century. ESO photograph courtesy Richard West. SPRING 1988 Volume 6, Number 1 DEEP SKY Letters to DSM The Observers Speak The Galaxies of Canes Venatici by Max Radloff Some ninety bright galaxies lie in the tiny constellation Canes Venatici, including familiar objects like the Whirlpool Galaxy and M63. However, as Max Radloffs article shows, some of the most interesting galaxies in Canes Venatici are lesser known Pushing to the Limit: The Palomar Clusters from Your Backyard by David Higgins Fifteen distant globular clusters discovered at Palomar Observatory are among the faintest and most obscure globular clusters known. David Higgins reports that at least five of these clusters are visible in large-aperture backyard telescopes Observing the Centaurus Galaxy Cluster by Jeffrey Cluster Centaurus is best known for Omega Centauri and the bright lenticular galaxy NGC 5128, but as Jeff Corder tells us, a marvelous galaxy cluster in Centaurus is also within the range of backyard instruments Photo Feature The Amazing Photography of Martin C. Germano Small Scope Showcase Comet Hunting for Galaxies Double Stars Am Variable Stars Whats in a Name? Scanning the Literature The Latest Research News DSM Reviews Exploring the Southern Sky Nearby Galaxies Atlas June 1988 VOL. 75, No. 6 A Hypersensitizing Primer Alain Maury A photographic scientist discusses the hows and whys of hypersensitizing black-and-white films. A Flowering of Japanese Astronomy Yoshihide Kozai How Japan became a world leader in astronomical research The Astrophysics of Suntanning Bradley E. Schaefer Tanning and buring depend on the Suns altitude in the sky and the amount of ozone in the stratosphere The Comet Champion David A. Rosenthal An interview with William Bradfield, the worlds greatest living comet hunter Does the Universe Rotate? Paul Davies How do we know the Earth spins? Surprisingly, the answer is far from simple AMATEUR ASTRONOMERS Eavesdropping on Soviet spacecraft ASTRONOMICAL COMPUTING Predicting eclipses of the Moon BACKYARD ASTRONOMY A guided tour through the Vulpecula Milky Way BOOKS AND THE SKY Southern peculiar galaxies and their associations CELESTIAL CALENDAR The moons of Saturn and two variable stars 50 AND 25 YEARS AGO FOCAL POINT Some UFOs really are spaceship! GALLERY GLEANINGS FOR ATMs Two observing aids and a wondrous timepiece IMAGES Saturn and Uranus among the nebulae of Sagitarius INDEX TO VOLUME 75 LETTERS NEWS NOTES OBSERVERS PAGE Can hypering improve planetary photography? RAMBLING THROUGH THE SKIES Centaur on the horizon SOUTHERN STARS COVER: On March 18th the Moons shadow swept across Indonesia and the Philippines bringing the third total solar eclipse of the 1980s to that corner of the globe. Veteran eclipse photographers Wendy Carlos and Annemarie Franklin of New York City photographed the event through light clouds from the balcony of the Matutum Hotel in General Santos on the Philippine island of Mindanao. This print showing a classic solar minimum corona with wispy polar brushes and long equatorial streamers was made by combining four negatives obtained with a Nikkor 1,200-mm f/11 lens and Mamiya 645 camera. The exposures on Fijicolor Super HR-100 film ranged from 1/8 to 4 seconds. Using a technique perfected at earlier eclipses, they composited the negatives through special masks to obtain this print. North is up. More eclipse pictures appear on page 672 July 1988 VOL. 76, No. 1 Star Trails in Time Sherman W. Schultz Star trails in a planetarium illustrate how precession gradually changes the sky Close Encounters with Phobos Aleksandr V. Zakharov An ambitious Soviet mission to the moons of Mars may answer some questions about the solar systems origin The Molecular Milky Way Thomas M. Dame A survey of celestial carbon monoxide emission yields a new view of our galaxy The First True Radio Telescope Joseph L. Spradley A half-century ago radio amateur Grote Reber began the development of the science of radio astronomy pioneer still does imaginate research Grote Reber: Yesterday and Today Paul A. Feldman Going strong at 76, a radio astronomy pioneer still does imaginative research Supernova 1987As Changing Face Ronald A. Schorn Eerie arcs of light now surround the exploded star, while closer in we are getting our first views of deeper parts of the expanding debris cloud Moonwatch – July 14, 1988 LeRoy E. Doggett, P. Kenneth Seidelmann, and Bradley E. Schaefer How early can the new crescent Moon be seen? Join in and find out The Extragalactic Zoo – II Ronald A. Schorn Quasars and Seyfert galaxies are among the most violent objects in the universe AMATEUR ASTRONOMERS A dome on golf balls ASTRONOMICAL COMPUTING Software for satellite tracking BOOKS AND THE SKY An amateur field guide to deep-sky observing CELESTIAL CALENDAR A beautiful evening occultation of Regulus 50 AND 25 YEARS AGO FOCAL POINT The sociology of solar eclipses GLEANINGS FOR ATMs Design your observatory for steady images LETTERS NEWS NOTES OBSERVERS PAGE Reports on Marchs eclipse RAMBLING THORUGH THE SKIES The sky in the year 0 S&T TEST REPORT The High-Lite binocular support COVER: Early this month, the twin spacecraft of the Soviet Unions Phobos project will star a seven-month voyage to Mars. The main objective is an examination of the red planets larger satellite, culminating in a close rendezvous in April of next year. From a scant 50 meters away, the spacecraft will fire a laser beam at Phobos surface, and on-board instruments will capture and analyze some of the vaporized material. Beginning on page 17, a Soviet scientist recounts what is known about the Martian moons and what might be learned from the international collection of instruments aboard these probes. Painting 1988 Michael Carroll. August 1988 VOL. 76, No. 2 Astrophysics at Apache Point Bruce Balick A fully automatic 3-5 meter telescope in New México is about to revolutionize the way astronomers view the heavens Teaching Old Spacecraft New Tricks Robert Farquhar and David Dunham Patience and gravity offer the Halley armada a new lease on life An Elusive Eclipse: July 21-22, 1990 Edward M. Brooks Ground-based observers hoping to view the next total eclipse of the Sun are likely to be plagued by clouds and inaccessibility The Day the Sun Cracked Sidney I. Scheuer An unusual group of sunspots in 1924 startled an astronomer into predicting catasprophe Do-It-Yourself Image Processing Gary S. Prentice Thanks to inexpensive personal computers and CCD cameras, amateur astrophotgraphy has a new image AMATEUR ASTRONOMERS News across the nations ASTRONOMICAL COMPUTING Tips on home image processing BACKYARD ASTRONOMY How to observe the Perseids this month BOOKS AND THE SKY Views from space CELESTIAL CALENDAR A partial lunar eclipse 50 AND 25 YEARS AGO FOCAL POINT Forget the doom and gloom – astronomy is booming GLEANINGS FOR ATMs The Yolo unobstructed reflector IMAGES An orbital view of Mars LETTERS NEWS NOTES OBSERVERS PAGE A look at several slow films for deep-sky photography RAMBLING THROUGH THE SKIES Planetary pickings SOUTHERN STARS COVER: Astronaut Edward H. Whites spacewalk outside the Gemini 4 spacecraft in June, 1965, was immortalized in this shot by command pilot James A. McDivitt. This picture portrays the expansive freedom experienced in space so lyrically that it is easy to understand why White (who died two years later in the Apolo 1 fire) had to be coaxed back into the capsule. This and more than 120 other photographs by the astronauts appear in the new book The view from Space: American Astronaut Photography 1962-1972, which is reviewed on page 150 September 1988 VOL. 76, No. 3 Discovering the Moons of Mars Steven J. Dick A recently unearthed manuscript by Asaph Hall throws new light on his famous achievement Mars Mania of Oppositions Past Roger W. Sinnott What used to happen on Earth whenever Mars drew near Mars 1909: Lessons Learned William Sheehan The 1909 opposition of Mars prompted a cold war among astronomers that ultimately resolved the decades-old Martian canal enigma Make a Telescope for $500: Model 1 David H. Levy The first installment of a three-part series looking at amateur telescope making today The Self-Reproducing Universe Eugene F. Mallove Our universe might not be the only one – not by a long shot! AMATEUR ASTRONOMERS Going mobile in Canada ASTRONOMICAL COMPUTING Finding the period of a variable star BOOKS AND THE SKY Lick Observatorys first century CELESTIAL CALENDAR Hunting the moons of Mars 50 AND 25 YEARS AGO FOCAL POINT How Orson Welles brought the Martians to Earth GLEANINGS FOR ATMs Equatorial tables without a pivot IMAGES Close-up of a Martian ice cap LETTERS NEWS NOTES OBSERVERS PAGE A group of galaxies that challenges observers RAMBLING THROUGH THE SKIES A stellar anniversary S&T TEST REPORT Two telescope accessories Center SKY & TELESCOPES ASTRONOMY RESOURCE GUIDE COVER: Water-ice clouds stream away from the extinct volcano Ascraeus Mons at sunrise in this striking crescent view of Mars, obtained by the Viking 2 spacecraft in 1976. The summits caldera sits 27 kilometers (17 miles) above the surrounding plains – fully three times higher than Earths largest volcano, Mauna Loa, rises from the Pacific Ocean floor. Dimly visible through haze near the middle of the crescent is the mighty canyon system Valles Marineris. Farther south sunlight glances off frost in the huge Argyre impact basin, where the crater Galle is outlined clearly. This month Mars passes closer to Earth than at any time since 1971, and planetary telescopes around the world are swinging into action. June 1988 VOL. 76, No. 4 The Extragalactic Zoo – IV Ronald A. Schorn Monsters, gravitational lenses, giant galactic arcs, and cosmic strings are some of the strangest beasts that inhabit the celestial menagerie Ten Days in Baltimore Richard Tresch Fienberg News from the 20th General Assembly of the International Astronomical Union Neutrinos from Supernova 1987A J. M. Lattiner and A. S. Burrows Scientists enjoyed their first ringside seat at the formation of a neutron star Observing from the South Pole MaryJane Taylor The coldest and driest place on Earth provides a unique observing site The Universe of Yakov Zeldovich Wolfgang Priester The late physicist blazed a trail linking subatomic particles to the universe at large Heading Toward Solar Maximun Harold Zirin Solar astronomers view the Suns recent activity outburst Ares Galore David H. Smith The giant arcs seen in distant clusters of galaxies are becoming less mysterious as more examples are found Earths Magnetic Environment L. J. Lanzerotti and C. Uberoi Space surrounding the Earths is not empty, but full of energetic charged particles that affect our planet AMATEUR ASTRONOMERS Astronomers haunting tales ASTRONOMICAL COMPUTING Van Gogh, two planets, and the Moon BACKYARD ASTRONOMY How to observe Octobers meteor showers BOOKS AND THE SKY A history of astrology CELESTIAL CALENDAR A daylight occulation, the asteroid Eros, and more 50 AND 25 YEARS AGO FOCAL POINT Its election time. Wheres there the debate on space policy? GLEANINGS FOR ATMs Some handy uses for light-emiting diodes LETTERS NEWS NOTES OBSERVERS PAGE High-speed film for do-it-yourself star maps RAMBLING THROUGH THE SKIES A variety of variables SOUTHERN STARS COVER: Russ Sampson photographed this spectacular aurora over downtown Edmonton, Canada, on September 25, 1987. Auroras are caused when charged particles stream toward Earths magnetic poles and bombard molecules in the upper atmosphere. The article beginning on page 360 discusses this and other diverse phenomena that occur in the space filled by Earths magnetic field. June 1988 VOL. 76, No. 5 What Amateurs Should Be Doing Brian G. Marsden North American amateur astronomers have plenty of good projects to tackle Astrophotography Then and Now Dennis di Cicco The role of amateur astrophotographers is about to change again Whatching the Premier Star Patrick S. McIntosh and Harold Leinbach Observations by amateurs can help scientists understand how the Sun works Observing Planets: A Lasting Legacy Stephen James O Meara Heres how you can help professionals monitor the classical planets The Moon Shall Rise Again Alan M. MacRobert Who says lunar observing is a thing of the past? Occultations and the Amateur Dennis di Cicco Watching the Moon hide stars is fascinating and can be scientifically valuable Astronomys Enduring Resource John Lankford A history of those who do astronomy for love and for money A galaxy of Amateur Astronomers Thomas R. Williams Glimpses of some famous amateurs of the past Double Stars Waiting To Be Measured Roger W. Sinnott Three amateurs rank among the top 15 double star observers of all time Six Million Variable Star Estimates Alan M. MacRobert Variable star observing is the model of amateur-professional symbiosis Listening to the Universe Ronald A. Schorn A few enthusiastic amateurs observe the universe at radio wavelengths Dragons in the Sky Richard Tresch Fienberg Surprisingly, you don’t have to travel to the arctic to see the majestic aurora When the Sun and Moon Embrace Leif J. Robinson Eclipses are mainly for fun, but a little science remains to be done The Future of Meteor Astronomy Alan M. MacRobert Amateur meteor studies may yet revive in North America AMATEUR ASTRONOMERS ASTRONOMICAL COMPUTING BOOKS AND THE SKY CELESTIAL CALENDAR 50 AND 25 YEARS AGO FOCAL POINT GLEANING FOR ATMs IMAGES NEWS NOTES OBSERVERS PAGE RAMBLING THROUGH THE SKIES COVER: With one hand anchored on Earth and his eyes raised to the heavens, this skywatcher symbolizes the position of the amateur in astronomy. Artist Greg Mort chose to depict a youthful figure observing the universe directly, with the naked eye, to encourage a new generation of beginning astronomers. Land and stars are both reflected and united in the pool of water at his feet. Into the Night was specially commissioned by Sky & Telescope for this issue. Copyright 1988 by Greg Mort. December 1988 VOL. 76, No. 6 The Top 10 Telescope Ideas of 1988 Some new trends, innovations, and nifty gadgets that made their appearance at the years four big ATM conventions Behold, Mars Stephen James O Meara See some of the finest Earth-based images ever taken of the red planet The Australia Telescope Ray Norris Radio astronomers have much cause to celebrate Australias 200th birthday J. L. E. Dreyer and His NGC Owen Gingerich The New General Catalogue of Nebulae and Clusters of Stars is exactly 100 years old. Here is how it began Discovering Plutos Atmosphere J. Kelly Beatty and Anita Killian An occultation lasting 100 second but anticipated for years has proven once and for all that far-flung Pluto is more than just an airless ball of ice The Waters Above, the Storm Below Mark Washburn A suggestion that Earth is continually bombarded by minicomets has led to acrimonious debate AMATEUR ASTRONOMERS Resorting to astronomy ASTRONOMICAL COMPUTING Sunrise, sunset, and the length of a day BOOKS AND THE SKY The radio universe CELESTIAL CALENDAR An amateur discovers a bright new variable star 50 AND 25 YEARS AGO FOCAL POINT Amateur astronomy, R. I. P.? GLEANING FOR ATMs Bicycle + conduit + Formica = telescope mount! INDEX TO VOLUME 76 LETTERS NEWS NOTES OBSERVERS PAGE RAMBLING THROUGH THE SKIES S&T TEST REPORT What do image intensifiers offer amateur astronomy? COVER: On September 26th at 1:15 Universal time, Jean Lecacheux (Meudon Observatory) and colleagues made this spectacular CCD image of Mars with the 1-meter reflector atop Pic du Midi in the French Pyrenees. Without a doubt, it is the best image of the red planet ever taken from Earth. Mars was only 36.7 million miles away and spanned 23.7 arc seconds in apparent size. To appreciate the intricate detail, look at the picture from a distance. The south polar cap is at upper right. Bespeckled Mare Tyrrhenum is at center with prominent Syrtis Major jutting off to the north (down). Dark, fingerlike Mare Cimmerium runs from upper left. This image – a composite of exposures in blue, green, and near-infrared light – does not represent the true visual colors. Numerical unsharp masking was used to boost contrast. More about Mars is on page 614

Número Ingreso Código Base de Datos Ubicación Tipo # Ej. Status Devolución Reserva
1052387HR 520 ENE-DIC 1988 ST  Colección Mario Sotillo UCSP - Sucre Original 1Disponible  

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