Download or read book Comet Shoemaker Levy 9 Fragment Size Estimates written by and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impact of Comet Shoemaker-Levy 9 on Jupiter in July, 1994, was the largest, most energetic impact event on a planet ever witnessed. Because it broke up during a close encounter with Jupiter in 1992, it was bright enough to be discovered more than a year prior to impact, allowing the scientific community an unprecedented opportunity to assess the effects such an event would have. Many excellent observations were made from Earth-based telescopes, the Hubble Space Telescope (HST) and the Galileo spacecraft en route to Jupiter. In this paper, these observations are used in conjunction with computational simulations performed with the CTH shock-physics hydrocode to determine the sizes of the fifteen fragments that made discernible impact features on the planet. To do this, CTH was equipped with a radiative ablation model and a post-processing radiative ray-trace capability that enabled light-flux predictions (often called the impact flash) for the viewing geometries of Galileo and ground-based observers. The five events recorded by Galileo were calibrated to give fragment size estimates. Compared against ground-based and HST observations, these estimates were extended using a least-squares analysis to assess the impacts of the remaining ten fragments. Some of the largest impacts (L, G and K) were greater that 1 km in diameter but the density of the fragments was low, about 0.25 g/cm3. The volume of the combined fifteen fragments would make a sphere 1.8 km in diameter. Assuming a pre-breakup density of 0.5 g/cm3, the parent body of Shoemaker-Levy 9 had a probable diameter of 1.4 km. The total kinetic energy of all the impacts was equivalent to the explosive yield of 300 Gigatons of TNT.
Download or read book Estimate of the size of comet Shoemaker Levy 9 from a tidal breakup model written by J. V. Scotti and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comets II written by Michel C. Festou and published by University of Arizona Press. This book was released on 2004-11-01 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of comets is a field that has seen tremendous advances in recent years, far surpassing the knowledge reflected in the original Comets volume published as part of the Space Science Series in 1982. This new volume, with more than seventy contributing authors, represents the first complete overview of comet science in more than a decade and contains the most extensive collection of knowledge yet assembled in the field. Comets II situates comet science in the global context of astrophysics for the first time by beginning with a series of chapters that describe the connection between stars and planets. It continues with a presentation of the formation and evolution of planetary systems, enabling the reader to clearly see the key role played in our own solar system by the icy planetesimals that were the seeds of the giant planets and transneptunian objects. The book presents the key results obtained during the 1990s, in particular those collected during the apparition of the exceptional comets C/Hyakutake and C/Hale-Bopp in 1996-1997. The latest results obtained from the in situ exploration of comets P/Borrelly and P/Wild 2 are also discussed in detail. Each topic of is designed to be accessible to students or young researchers looking for basic, yet detailed, complete and accurate, information on comet science. With its emphasis on the origin of theories and the future of research, Comets II will enable scientists to make connections across disciplinary boundaries and will set the stage for discovery and new understanding in the coming years.
Download or read book Impactful Times written by James R. Asay and published by Springer. This book was released on 2017-05-02 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a history of shock compression science, including development of experimental, material modeling, and hydrodynamics code technologies over the past six decades at Sandia National Laboratories. The book is organized into a discussion of major accomplishments by decade with over 900 references, followed by a unique collection of 45 personal recollections detailing the trials, tribulations, and successes of building a world-class organization in the field. It explains some of the challenges researchers faced and the gratification they experienced when a discovery was made. Several visionary researchers made pioneering advances that integrated these three technologies into a cohesive capability to solve complex scientific and engineering problems. What approaches worked, which ones did not, and the applications of the research are described. Notable applications include the turret explosion aboard the USS Iowa and the Shoemaker-Levy comet impact on Jupiter. The personal anecdotes and recollections make for a fascinating account of building a world-renowned capability from meager beginnings. This book will be inspiring to the expert, the non expert, and the early-career scientist. Undergraduate and graduate students in science and engineering who are contemplating different fields of study should find it especially compelling.
Download or read book Catastrophic Events Caused by Cosmic Objects written by Vitaly Adushkin and published by Springer Science & Business Media. This book was released on 2007-10-09 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: An asteroid or comet will inevitably strike the Earth some day, and potentially cause great destruction. This volume considers hazards due to collisions with cosmic objects, particularly in light of recent investigations of impacts by the authors. Each chapter, written by an expert, contains an overview of an aspect and new findings in the field. Coverage describes and numerically estimates the main hazardous effects.
Download or read book Mitigation of Hazardous Comets and Asteroids written by M. J. S. Belton and published by Cambridge University Press. This book was released on 2004-09-06 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is known that large asteroids and comets can collide with the Earth with severe consequences. Although the chances of a collision in a person's lifetime are small, collisions are a random process and could occur at any time. This book collects the latest thoughts and ideas of scientists concerned with mitigating the threat of hazardous asteroids and comets. It reviews current knowledge of the population of potential colliders, including their numbers, locations, orbits, and how warning times might be improved. The structural properties and composition of their interiors and surfaces are reviewed, and their orbital response to the application of pulses of energy is discussed. Difficulties of operating in space near, or on the surface of, very low mass objects are examined. The book concludes with a discussion of the problems faced in communicating the nature of the impact hazard to the public.
Download or read book The Great Comet Crash written by John R. Spencer and published by CUP Archive. This book was released on 1995-09-29 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cosmic collision of the century, in words and photographs.
Download or read book Catastrophic Events and Mass Extinctions written by Christian Koeberl and published by Geological Society of America. This book was released on 2002 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Breakthrough written by Robert Gendler and published by Springer. This book was released on 2015-11-05 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique volume by two renowned astrophotographers unveils the science and history behind 100 of the most significant astronomical images of all time. The authors have carefully selected their list of images from across time and technology to bring to the reader the most relevant photographic images spanning all eras of modern astronomical history. Based on scientific evidence today we have a basic notion of how Earth and the universe came to be. The road to this knowledge was paved with 175 years of astronomical images acquired by the coupling of two revolutionary technologies – the camera and telescope. With ingenuity and determination humankind would quickly embrace these technologies to tell the story of the cosmos and unravel its mysteries. This book presents in pictures and words a photographic chronology of our aspiration to understand the universe. From the first fledgling attempts to photograph the Moon, planets, and stars to the marvels of orbiting observatories that record the cosmos at energies beyond the range of human vision, astronomers have always relied on images to "break through" to the next level of understanding. A subset of these breakthrough images has profound significance in documenting some of the greatest milestones in modern astronomy.
Download or read book Handbook of Cosmic Hazards and Planetary Defense written by Joseph N. Pelton and published by Springer. This book was released on 2015-04-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers in a comprehensive fashion all aspects of cosmic hazards and possible strategies for contending with these threats through a comprehensive planetary defense strategy. This handbook brings together in a single reference work a rich blend of information about the various types of cosmic threats that are posed to human civilization by asteroids, comets, bolides, meteors, solar flares and coronal mass ejections, cosmic radiation and other types of threats that are only recently beginning to be understood and studied, such as investigation of the “cracks” in the protective shield provided by the Van Allen belts and the geomagnetosphere, of matter-antimatter collisions, orbital debris and radiological or biological contamination. Some areas that are addressed involve areas about which there is a good deal of information that has been collected for many decades by multiple space missions run by many different space agencies, observatories and scientific researchers. Other areas involving research and studies that have only recently gotten underway are discussed by some of the world’s foremost experts in each of these areas, who provide up-to-date and scientifically verifiable information. Although much of the work in these various areas have been conducted by space agencies, an expanding range of work is also being carried out by observatories, by universities and other research centers, and even by private foundations and professional organizations. The purpose of this work is thus several-fold: to include the latest information and most systematic research from around the world in a single reference work; to note where there are significant gaps in knowledge where new research, spacecraft, observatories, or other initiatives are needed to fill in critical missing information; and to give the best possible information about preventative actions that might be taken against cosmic threats and identify various alternative strategies that are now under way or planned to cope with these various threats.
Download or read book Newton s Gravity written by Douglas W. MacDougal and published by Springer Science & Business Media. This book was released on 2012-12-16 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Newton’s Gravity” conveys the power of simple mathematics to tell the fundamental truth about nature. Many people, for example, know the tides are caused by the pull of the Moon and to a lesser extent the Sun. But very few can explain exactly how and why that happens. Fewer still can calculate the actual pulls of the Moon and Sun on the oceans. This book shows in clear detail how to do this with simple tools. It uniquely crosses disciplines – history, astronomy, physics and mathematics – and takes pains to explain things frequently passed over or taken for granted in other books. Using a problem-based approach, “Newton’s Gravity” explores the surprisingly basic mathematics behind gravity, the most fundamental force that governs the movements of satellites, planets, and the stars. Author Douglas W. MacDougal uses actual problems from the history of astronomy, as well as original examples, to deepen understanding of how discoveries were made and what they mean. “Newton’s Gravity” concentrates strongly on the development of the science of orbital motion, beginning with Galileo, Kepler, and Newton, each of whom is prominently represented. Quotes and problems from Galileo’s Dialogs Concerning Two New Sciences and particularly Newton’s Principia help the reader get inside the mind of those thinkers and see the problems as they saw them, and experience their concise and typically eloquent writing. This book enables students and curious minds to explore the mysteries of celestial motion without having to know advanced mathematics. It will whet the reader’s curiosity to explore further and provide him or her the tools (mathematical or physical) to do so.
Download or read book Near earth Objects written by John L. Remo and published by . This book was released on 1997 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary focus of 47 papers (from an April 1995 meeting) is directed toward the need for gathering and interpreting scientific data to understand the Earth's past history, evaluate current astronomical observations, and outline future exploration missions to NEOs. Sections on astronomy, earth and planetary sciences, astronautics, detection and mitigation, and UN issues can be thought of as a continuation of those contained within the foundation volume Hazards Due to Comets and Asteroids which summarizes most of the preceding work in NEOs and serves as a starting place for those interested in the study of NEOs and their possible interaction with the Earth. No index. Annotation copyrighted by Book News, Inc., Portland, OR.
Download or read book Jupiter written by Fran Bagenal and published by Cambridge University Press. This book was released on 2006 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive volume that summarizes our understanding of the jovian system.
Download or read book Turbulence and Self Organization written by Mikhail Ya Marov and published by Springer Science & Business Media. This book was released on 2013-01-16 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with the development of continual models of turbulent natural media. Such models serve as a ground for the statement and numerical evaluation of the key problems of the structure and evolution of the numerous astrophysical and geophysical objects. The processes of ordering (self-organization) in an originally chaotic turbulent medium are addressed and treated in detail with the use of irreversible thermodynamics and stochastic dynamics approaches which underlie the respective models. Different examples of ordering set up in the natural environment and outer space are brought and thoroughly discussed, the main focus being given to the protoplanetary discs formation and evolution.
Download or read book Lunar and Planetary Science written by and published by . This book was released on 1997 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact Jupiter written by David H. Levy and published by Springer. This book was released on 2013-11-11 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amateur astronomer and Shoemaker-Levy 9 comet co-discoverer David Levy recounts the story of the crash of the comet into the surface of Jupiter on July 16, 1994, and what the celestial impact taught scientists and the world.
Download or read book The First Rung written by Hamid Rafizadeh and published by Archway Publishing. This book was released on 2018-05-21 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: What can the long-dead ancients tell us about our future? Plenty, according to sacred texts and modern science. While the modern person has only witnessed one celestial state of the earth, ancient peoples have witnessed two. Science calls these two versions glacial and interglacial earth, but to the ancients they are the blue-skied earth and the canopied earth. And as the earth positions to once again flip to its yet unknown secondary state, we can turn to the ancients for answers. The First Rung weaves together the stories of humanitys epic struggle to understand the past in order to understand the presentand most importantly, to understand the future. This fascinating account provides eye-opening insight into the mix of ancient and modern knowledge that defines the earths celestial environment, and author Hamid Rafizadeh offers a tour of the evidence regarding the earths two different versionsdetails of which our ancient human ancestors have seen. By bringing echoes of the past into the present, we can have an intellectual awakening of the knowledge that holds the answers for humanitys survival and well-being. The unknown, hidden past of the ancients haunts the modern humans life; it is a dangerous shadow cast on everyone, but it is also a knowledge not to be missed.
