Download or read book Hubble Space Telescope Flaw written by United States. Congress. House. Committee on Science, Space, and Technology and published by . This book was released on 1990 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Hubble Space Telescope Optical Systems Failure Report written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-14 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The findings of the Hubble Space Telescope Optical Systems Board of Investigation are reported. The Board was formed to determine the cause of the flaw in the telescope, how it occurred, and why it was not detected before launch. The Board conducted its investigation to include interviews with personnel involved in the fabrication and test of the telescope, review of documentation, and analysis and test of the equipment used in the fabrication of the telescope's mirrors. The investigation proved that the primary mirror was made in the wrong shape (a 0.4-wave rms wavefront error at 632.8 nm). The primary mirror was manufactured by the Perkin-Elmer Corporation (Hughes Danbury Optical Systems, Inc.). The critical optics used as a template in shaping the mirror, the reflective null corrector (RNC), consisted of two small mirrors and a lens. This unit had been preserved by the manufacturer exactly as it was during the manufacture of the mirror. When the Board measured the RNC, the lens was incorrectly spaced from the mirrors. Calculations of the effect of such displacement on the primary mirror show that the measured amount, 1.3 mm, accounts in detail for the amount and character of the observed image blurring. No verification of the reflective null corrector's dimensions was carried out by Perkin-Elmer after the original assembly. There were, however, clear indications of the problem from auxiliary optical tests made at the time. A special optical unit called an inverse null corrector, designed to mimic the reflection from a perfect primary mirror, was built and used to align the apparatus; when so used, it clearly showed the error in the reflective null corrector. A second null corrector was used to measure the vertex radius of the finished primary mirror. It, too, clearly showed the error in the primary mirror. Both indicators of error were discounted at the time as being themselves flawed. The Perkin-Elmer plan for fabricating the primary mirror placed complete relia...
Download or read book Hubble Space Telescope Flaw written by United States. Congress. House. Committee on Science, Space, and Technology and published by . This book was released on 1990 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life with Hubble written by David S. Leckrone and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Space Telescope is one of the most important scientific and engineering endeavors of our time. It has given humankind the first truly clear view of the heavens and has revolutionized almost every area of modern astronomy. The author this text, David Leckrone, worked as a project scientist on Hubble for 33 years. From 1992-2009 he was the Senior Project Scientist for Hubble at NASA's Goddard Space Flight Center. In that role he had an insider's view of the trials and triumphs of the Hubble mission, including its extraordinary scientific discoveries and the personal journeys of the astronomers who made them, the adventure of five successful shuttle-based servicing missions, and the quiet heroism of the many scientists, engineers and managers who rose to the occasion when Hubble was in trouble. This book is loosely a personal memoir but can more accurately be called a "Hubble family memoir" for which Leckrone serves as narrator
Download or read book Assessment of Options for Extending the Life of the Hubble Space Telescope written by National Research Council and published by National Academies Press. This book was released on 2005-02-28 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Space Telescope (HST) has operated continuously since 1990. During that time, four space shuttle-based service missions were launched, three of which added major observational capabilities. A fifth â€" SM-4 â€" was intended to replace key telescope systems and install two new instruments. The loss of the space shuttle Columbia, however, resulted in a decision by NASA not to pursue the SM-4 mission leading to a likely end of Hubble's useful life in 2007-2008. This situation resulted in an unprecedented outcry from scientists and the public. As a result, NASA began to explore and develop a robotic servicing mission; and Congress directed NASA to request a study from the National Research Council (NRC) of the robotic and shuttle servicing options for extending the life of Hubble. This report presents an assessment of those two options. It provides an examination of the contributions made by Hubble and those likely as the result of a servicing mission, and a comparative analysis of the potential risk of the two options for servicing Hubble. The study concludes that the Shuttle option would be the most effective one for prolonging Hubble's productive life.
Download or read book The Hubble Wars written by Eric Chaisson and published by Harvard University Press. This book was released on 1998 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Space Telescope is the largest, most complex, and most powerful observatory ever deployed in space. Now Eric Chaisson, the senior scientist on the HST project, tells the inside story of the much heralded mission to fix the telescope. Copyright © Libri GmbH. All rights reserved.
Download or read book The Universe in a Mirror written by Robert Zimmerman and published by Princeton University Press. This book was released on 2008 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Space Telescope has transformed our understanding of the universe, revealing new information about its age and evolution, the life cycle of stars, and the existence of black holes, among other discoveries. This book tells the story of the Hubble Space Telescope and the people responsible for it.
Download or read book The Hubble Space Telescope Optical Systems Failure Report written by and published by . This book was released on 1990 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hubble written by David H. Devorkin and published by National Geographic Books. This book was released on 2011-11-01 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the spirit of National Geographic’s top-selling Orbit, this large-format, full-color volume stands alone in revealing more than 200 of the most spectacular images from the Hubble Space Telescope during its lifetime, to the very eve of the 2008 final shuttle mission to the telescope. Written by two of the world’s foremost authorities on space history, Hubble: Imaging Space and Time illuminates the solar system’s workings, the expansion of the universe, the birth and death of stars, the formation of planetary nebulae, the dynamics of galaxies, and the mysterious force known as "dark energy." The potential impact of this book cannot be overstressed: The 2008 servicing mission to install new high-powered scientific instruments is especially high profile because the cancellation of the previous mission, in 2004, caused widespread controversy. The authors reveal the inside story of Hubble’s beginnings, its controversial early days, the drama of its first servicing missions, and the creation of the dynamic images that reach into the deepest regions of visible space, close to the time when the universe began. A wealth of astonishing images leads us to the very edge of known space, setting the stage for the new James Webb Space Telescope, scheduled to launch in 2013. Find the stunning panoramic of Carina Nebula, detailing star birth as never before; a jet from a black hole in one galaxy striking a neighboring galaxy; a jewel-like collection of galaxies from the early years of the universe; and a giant galaxy cannibalizing a smaller galaxy. Timed for the 2008 shuttle launch and coinciding with the 400th anniversary of Galileo’s first telescope, Hubble: Imaging Space and Time accompanies a high-profile exhibit at the National Air and Space Museum and will be featured on the popular NASM website.
Download or read book Handprints on Hubble written by Kathryn D. Sullivan and published by MIT Press. This book was released on 2019-11-05 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first American woman to walk in space recounts her experience as part of the team that launched, rescued, repaired, and maintained the Hubble Space Telescope The Hubble Space Telescope has revolutionized our understanding of the universe. It has, among many other achievements, revealed thousands of galaxies in what seemed to be empty patches of sky; transformed our knowledge of black holes; found dwarf planets with moons orbiting other stars; and measured precisely how fast the universe is expanding. In Handprints on Hubble, retired astronaut Kathryn Sullivan describes her work on the NASA team that made all this possible. Sullivan, the first American woman to walk in space, recounts how she and other astronauts, engineers, and scientists launched, rescued, repaired, and maintained Hubble, the most productive observatory ever built. Along the way, Sullivan chronicles her early life as a “Sputnik Baby,” her path to NASA through oceanography, and her initiation into the space program as one of “thirty-five new guys.” (She was also one of the first six women to join NASA’s storied astronaut corps.) She describes in vivid detail what liftoff feels like inside a spacecraft (it’s like “being in an earthquake and a fighter jet at the same time”), shows us the view from a spacewalk, and recounts the temporary grounding of the shuttle program after the Challenger disaster. Sullivan explains that “maintainability” was designed into Hubble, and she describes the work of inventing the tools and processes that made on-orbit maintenance possible. Because in-flight repair and upgrade was part of the plan, NASA was able to fix a serious defect in Hubble’s mirrors—leaving literal and metaphorical “handprints on Hubble.” Handprints on Hubble was published with the support of the MIT Press Fund for Diverse Voices.
Download or read book How NASA Builds Teams written by Charles J. Pellerin and published by John Wiley & Sons. This book was released on 2009-07-07 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every successful organization needs high-performance teams to compete and succeed. Yet, technical people are often resistant to traditional "touchy-feely" teambuilding. To improve communication, performance, and morale among NASA’s technical teams, former NASA Astrophysicist Dr. Charlie Pellerin developed the teambuilding process described in "How NASA Builds Teams"—an approach that is proven, quantitative, and requires only a fraction of the time and resources of traditional training methods. This "4-D" process has boosted team performance in hundreds of NASA project teams, engineering teams, and management teams, including the people responsible for NASA’s most complex systems — the Space Shuttle, space telescopes, robots on Mars, and the mission back to the moon. How NASA Builds Teams explains how the 4-D teambuilding process can be applied in any organization, and includes a fast, free on-line behavioral assessment to help your team and the individual members understand each other and measure the key driver of team performance, the social context. Moreover, these simple, logical processes appeal strongly to technical teams who eschew "touchy-feely" training. Pellerin applies simple, elegant principles from his physics background to the art teambuilding, such as the use of a coordinate system to analyze the characteristics of team performance into actionable elements. The author illustrates the teambuilding process with entertaining stories from his decade as NASA’s Director for Astrophysics and subsequent 15 years of working closely with NASA and outside business teams. For example, he tells how the processes in the book enabled him to initiate the space mission to fix the Hubble Space Telescope’s flawed mirror. Free downloadable resources will help you: Identify your teammates’ innate personalities Diagram your culture (And compare it to your customer’s) Measure the coherency of your project’s paradigm (Get this wrong and you will be fired!) and Learn to meet people’s need to feel valued by you. Further, you can download and use Pellerin’s most powerful tool for influencing the outcome of any difficult situation: the Context Shifting Worksheet.
Download or read book Hubble Space Telescope written by United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Space and published by . This book was released on 1994 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hubble Legacy written by Jim Bell and published by Union Square + ORM. This book was released on 2021-08-03 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive book on the Hubble Space Telescope, written by a noted astronomer, geologist, and planetary scientist. Looking deep into space, by definition, means looking back in time—and the Hubble Space Telescope can look very far back, including at stars, nebulae, and galaxies that are millions, even billions, of years old. If there is a single legacy of Hubble as it turns thirty years old and nears the end of its useful life, it is this: It has done more to chronicle the origin and evolution of the known universe than any other instrument ever created. Hubble has also captured an astounding collection of ultraviolet images that include geysers of solar light, Mars’ famous dust storms, exploding stars, solar flares, globular clusters, and actual galaxies colliding. As for scientific milestones, Hubble has helped us learn that the universe is 13.8 billion years old, that just about every large galaxy features a black hole at its center, and that it's possible to create 3-D maps of dark matter. Hubble Legacy will not only feature the most stunning imagery captured by the telescope, but also explain how Hubble has advanced our understanding of the universe and our very creation. Praise for Hubble Legacy “Along with his clear description of the Hubble Space Telescope’s setbacks and successes, Jim Bell has compiled an exquisite collection of stunning photographs of the universe. Have many long looks— your tax dollars at work— an astronomer’s catalog of the cosmos.” —Bill Nye, CEO, The Planetary Society “You can’t flip through this stunning collection of Hubble images without pausing often to shake your head in awe. The accompanying text that Contributing Editor Jim Bell wrote is equally enriching. Altogether, this coffee-table book is a riveting celebration of the venerable space telescope’s 30th anniversary.” —Sky & Telescope
Download or read book NASA Historical Data Book NASA launch systems space transportation human spaceflight and space science 1989 1998 written by and published by . This book was released on 1988 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Feature Centric View of Information Retrieval written by Donald Metzler and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercial Web search engines such as Google, Yahoo, and Bing are used every day by millions of people across the globe. With their ever-growing refinement and usage, it has become increasingly difficult for academic researchers to keep up with the collection sizes and other critical research issues related to Web search, which has created a divide between the information retrieval research being done within academia and industry. Such large collections pose a new set of challenges for information retrieval researchers. In this work, Metzler describes highly effective information retrieval models for both smaller, classical data sets, and larger Web collections. In a shift away from heuristic, hand-tuned ranking functions and complex probabilistic models, he presents feature-based retrieval models. The Markov random field model he details goes beyond the traditional yet ill-suited bag of words assumption in two ways. First, the model can easily exploit various types of dependencies that exist between query terms, eliminating the term independence assumption that often accompanies bag of words models. Second, arbitrary textual or non-textual features can be used within the model. As he shows, combining term dependencies and arbitrary features results in a very robust, powerful retrieval model. In addition, he describes several extensions, such as an automatic feature selection algorithm and a query expansion framework. The resulting model and extensions provide a flexible framework for highly effective retrieval across a wide range of tasks and data sets. A Feature-Centric View of Information Retrieval provides graduate students, as well as academic and industrial researchers in the fields of information retrieval and Web search with a modern perspective on information retrieval modeling and Web searches.
Download or read book Status of the Hubble Space Telescope written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space and published by . This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Historical Data Book written by and published by . This book was released on 1988 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
