Download or read book Seeing Gravity written by Bernard Lavenda and published by Independently Published. This book was released on 2019-04-09 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: What happens when you push a theory beyond its limits? You get a theory like general relativity. Although coined by Einstein, he would be hard pressed to recognize it. Einstein constructed a theory that would pertain to geodesic motion, or motion at constant velocity. Einstein field equations are equivalent to geometrical optics whose characteristic surfaces are those of electromagnetic, and not gravitational, radiation. In fact, gravitational energy is not included in the Einstein energy-stress tensor. As such it excludes catastrophic phenomena like the merger of black holes or neutron stars. In fact, black holes are what you get when you extend a non-Euclidean metric, like the Schwarzschild metric, beyond its domain of validity. Although there exists no solution to Einstein's field equations for two interacting mass-points, its numerical counterpart vants at being able to describe binary black hole collisions. Such singularities were pernicious to Einstein's conception of the universe, and he built bridges to avoid them. Nonlinear equations like Einstein's cannot be approximated by their linearization over large portions of spacetime thus placing in doubt the propagation of gravitational waves. Any wave phenomenon traveling at a finite velocity must show signs of aberration. No signs of such have ever been observed. The field equations do not possess a mechanism for the emission of gravitational waves, least of all for their attenuation.
Download or read book Gravity s Shadow written by Harry Collins and published by University of Chicago Press. This book was released on 2010-08-15 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the theory of relativity, we are constantly bathed in gravitational radiation. When stars explode or collide, a portion of their mass becomes energy that disturbs the very fabric of the space-time continuum like ripples in a pond. But proving the existence of these waves has been difficult; the cosmic shudders are so weak that only the most sensitive instruments can be expected to observe them directly. Fifteen times during the last thirty years scientists have claimed to have detected gravitational waves, but so far none of those claims have survived the scrutiny of the scientific community. Gravity's Shadow chronicles the forty-year effort to detect gravitational waves, while exploring the meaning of scientific knowledge and the nature of expertise. Gravitational wave detection involves recording the collisions, explosions, and trembling of stars and black holes by evaluating the smallest changes ever measured. Because gravitational waves are so faint, their detection will come not in an exuberant moment of discovery but through a chain of inference; for forty years, scientists have debated whether there is anything to detect and whether it has yet been detected. Sociologist Harry Collins has been tracking the progress of this research since 1972, interviewing key scientists and delineating the social process of the science of gravitational waves. Engagingly written and authoritatively comprehensive, Gravity's Shadow explores the people, institutions, and government organizations involved in the detection of gravitational waves. This sociological history will prove essential not only to sociologists and historians of science but to scientists themselves.
Download or read book Gravity s Kiss written by Harry Collins and published by MIT Press. This book was released on 2018-03-02 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fascinating account, written in real time, of the unfolding of a scientific discovery: the first detection of gravitational waves. Scientists have been trying to confirm the existence of gravitational waves for fifty years. Then, in September 2015, came a “very interesting event” (as the cautious subject line in a physicist's email read) that proved to be the first detection of gravitational waves. In Gravity's Kiss, Harry Collins—who has been watching the science of gravitational wave detection for forty-three of those fifty years and has written three previous books about it—offers a final, fascinating account, written in real time, of the unfolding of one of the most remarkable scientific discoveries ever made. Predicted by Einstein in his theory of general relativity, gravitational waves carry energy from the collision or explosion of stars. Dying binary stars, for example, rotate faster and faster around each other until they merge, emitting a burst of gravitational waves. It is only with the development of extraordinarily sensitive, highly sophisticated detectors that physicists can now confirm Einstein's prediction. This is the story that Collins tells. Collins, a sociologist of science who has been embedded in the gravitational wave community since 1972, traces the detection, the analysis, the confirmation, and the public presentation and the reception of the discovery—from the first email to the final published paper and the response of professionals and the public. Collins shows that science today is collaborative, far-flung (with the physical location of the participants hardly mattering), and sometimes secretive, but still one of the few institutions that has integrity built into it.
Download or read book Everything About Gravity Proceedings Of The Second Lecospa International Symposium written by Pisin Chen and published by World Scientific. This book was released on 2016-12-29 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 2nd LeCosPA International Symposium, 'Everything about Gravity', collects 78 papers contributed by the symposium's Plenary Session and Parallel Session speakers. Organizers of the Parallel Sessions have in addition prepared summaries for their own sessions. The topics range from quasi-local energy in GR in the presence of gravitational radiations, a gauge theory perspective of gravity, naked black hole firewalls related to the black hole information loss paradox, a new theory of spacetime quantization, relations between the Schwinger effect and the Hawking radiation and Unruh effect, conformal frames in cosmology, surprises in nonrelativistic naturalness, inflation and tensor fluctuations, emergent spacetime for quantum gravity, understanding strongly coupled magnetism through holographic principle, the detections of dark matter, ultra-high energy cosmic neutrinos and cosmic rays, etc. Last but not least, the closing remark delivered by John Ellis raised the following question: Does cosmological inflation require a modification of Einstein's gravity?After 100 years of remarkable success of Einstein's general relativity, the development of a successful quantum theory of gravity has become a major goal in physics in the 21st century. This volume serves as a valuable reference for scientists who are interested in frontier research topics of gravity.
Download or read book Overcoming Gravity written by Steven Low and published by . This book was released on 2016-11-25 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity s Century written by Ron Cowen and published by Harvard University Press. This book was released on 2019-05-06 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: “This gracefully written history of twentieth-century gravity research” brings to life the discoveries and developments that confirmed the theory of relativity (Publishers Weekly, starred review). Albert Einstein did nothing of note on May 29, 1919, yet that is when he became immortal. On that day, astronomer Arthur Eddington and his team observed a solar eclipse and found something extraordinary: gravity bends light, just as Einstein predicted. The finding confirmed the theory of general relativity, fundamentally changing our understanding of space and time. A century later, the Event Horizon Telescope examined the space surrounding Sagittarius A*, the supermassive black hole at the center of the Milky Way, to determine whether Einstein was right on the details. In Gravity’s Century, award-winning science writer Ron Cowen brings to life the incredible scientific journey between these two events and sheds light on their groundbreaking implications. From the development of radio telescopes to the discovery of black holes and quasars, and the still-unresolved place of gravity in quantum theory, Cowen breaks down the physics in clear and approachable language. Gravity’s Century vividly demonstrates how the quest to understand gravity is really the quest to comprehend the universe./
Download or read book Gravity s Ghost and Big Dog written by Harry Collins and published by University of Chicago Press. This book was released on 2014-01-23 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: “In part an account of sociological fieldwork among scientists in the field and part astronomy-history mystery. . . . a terrific read.” —Nature Gravity’s Ghost and Big Dog brings to life science’s efforts to detect cosmic gravitational waves. These ripples in space-time are predicted by general relativity, and their discovery will not only demonstrate the truth of Einstein’s theories but also transform astronomy. Although no gravitational wave has ever been directly detected, the previous five years have been an exciting period in the field. Sociologist Harry Collins offers readers an unprecedented view of the research and explains what it means for an analyst to do work of this kind. Collins was embedded with the gravitational wave physicists as they confronted two possible discoveries—“Big Dog,” fully analyzed in this volume for the first time, and the “Equinox Event,” which was first chronicled by Collins in Gravity’s Ghost. Collins records the agonizing arguments that arose as the scientists worked out what they had seen and how to present it to the world, along the way demonstrating how even the most statistical of sciences rest on social and philosophical choices. Gravity’s Ghost and Big Dog draws on nearly fifty years of fieldwork observing scientists at the American Laser Interferometer Gravitational Wave Observatory and elsewhere around the world to offer an inspired commentary on the place of science in society today. “The physics junkie or philosophy of science enthusiast . . . will find lots to mull over.” —Science News “Makes for very entertaining reading.” —Daniel Kennefick, University of Arkansas, author of Traveling at the Speed of Thought
Download or read book Gravity s Angels written by Michael Swanwick and published by Frog Books. This book was released on 2001 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: These thirteen stories established Michael Swanwick as one of the brightest stars in the science-fiction firmament. Alongside its companion volume, Tales of Old Earth, Gravity's Angels showcases the very best of Swanwick's considerable talent, including the Sturgeon Award--winner "The Edge of the World." Each story is a unique and engrossing exploration of character, conflict, and conscience.
Download or read book Topics On Strong Gravity A Modern View On Theories And Experiments written by Cesar Augusto Zen Vasconcellos and published by World Scientific. This book was released on 2019-12-26 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The book concentrates attention on extended alternative theories of gravity and on the best astrophysical laboratories to probe the strong gravity-field regime: black holes, pulsars and neutron stars … Readers will likely share the satisfaction the editor and contributors say they experienced as they organized the book.'SirReadaLotFor more than a century, our understanding of gravitational physics was based on Albert Einstein's theory of General Relativity, which fundamentally changed our understanding of the Universe, its origin, and its evolutionary process. General Relativity accurately describes a large number of phenomena on very different scales. As such, it has been very well tested and its remarkable predictions are compatible with most experimental and observational data. However, the observational and experimental results compatible with General Relativity fall in its vast majority under the weak gravitational field regime. In recent years, discrepancies between the data and the corresponding predictions of General Relativity have been observed and have generated intense research activity. One of the most critical aspects of General Relativity is the presence of singularities in extreme physical situations. These discrepancies indicate that either the parameters of the theory must be modified in the regime of strong field gravity/high energy and large space-time curvature, or the theory itself should be modified. In this book, we focus our attention on extended alternative gravity theories and the best astrophysical laboratories to probe the strong field regime: black holes, pulsars, and neutron stars.
Download or read book Gravity s Rainbow written by Thomas Pynchon and published by Penguin. This book was released on 2012-06-13 with total page 885 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of the 1974 National Book Award "The most profound and accomplished American novel since the end of World War II." - The New Republic “A screaming comes across the sky. . .” A few months after the Germans’ secret V-2 rocket bombs begin falling on London, British Intelligence discovers that a map of the city pinpointing the sexual conquests of one Lieutenant Tyrone Slothrop, U.S. Army, corresponds identically to a map showing the V-2 impact sites. The implications of this discovery will launch Slothrop on an amazing journey across war-torn Europe, fleeing an international cabal of military-industrial superpowers, in search of the mysterious Rocket 00000.
Download or read book Gravity s Revolt Part Four written by William Guy and published by Xlibris Corporation. This book was released on 2001-02-06 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: William Guy (when he is not traveling) lives and writes in Pittsburgh, Pennsylvania. He is the author of Gravitys Revolt, a novel; Defunctive Music, a book of poems;A Travelers Education; Magic Casements; and Something Sensational, three books of travel essays. With William Orr he is the author of Living Hope: a Study of the New Testament Theme of Birth from Above. He has completed a translation of The Iliad. He is presently at work on The Lyndoniad, a book of interrelated poems about the year 1968, a long poem containing history (he hopes).
Download or read book Gravity Falls Lost Legends written by Alex Hirsch and published by Disney Electronic Content. This book was released on 2018-07-24 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of four all-new strange stories from the sleepy town of Gravity Falls in one original graphic novel. Written by Alex Hirsch. Illustrated by Asaf Hanuka, Dana Terrace, Ian Worrel, Jacob Chabot, Jim Campbell, Joe Pitt, Kyle Smeallie, Meredith Gran, Mike Holmes, Priscilla Tang, Serina Hernandez, Stephanie Ramirez, and Valerie Halla.
Download or read book Seeing the Science in Children s Thinking written by David Hammer and published by Heinemann Educational Books. This book was released on 2006 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is a field guide to the science classroom with authentic examples presented in written and video form. The authors offer six in-depth case studies of class discussion from grades 1 through 8, each keyed to clips of minimally edited in-the-classroom footage on the companion DVD-ROM."--BOOK JACKET.
Download or read book Gravity s Rainbow Domination and Freedom written by Luc Herman and published by University of Georgia Press. This book was released on 2013-12-15 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: When published in 1973, Gravity’s Rainbow expanded our sense of what the novel could be. Pynchon’s extensive references to modern science, history, and culture challenged any reader, while his prose bent the rules for narrative art and his satirical practices taunted U.S. obscenity and pornography statutes. His writing thus enacts freedom even as the book’s great theme is domination: humanity’s diminished “chances for freedom” in a global military-industrial system birthed and set on its feet in World War II. Its symbol: the V-2 rocket. “Gravity’s Rainbow,” Domination, and Freedom broadly situates Pynchon’s novel in “long sixties” history, revealing a fiction deeply of and about its time. Herman and Weisenburger put the novel’s abiding questions about freedom in context with sixties struggles against war, restricted speech rights, ethno-racial oppression, environmental degradation, and subtle new means of social and psychological control. They show the text’s close indebtedness to critiques of domination by key postwar thinkers such as Erich Fromm, Herbert Marcuse, and Hannah Arendt. They detail equally powerful ways that sixties countercultural practices—free-speech resistance played out in courts, campuses, city streets, and raucously satirical underground presswork—provide a clearer bearing on Pynchon’s own satirical practices and their implicit criticisms. If the System has jacketed humanity in a total domination, may not a solitary individual still assert freedom? Or has the System captured all—even supposedly immune elites—in an irremediable dominion? Reading Pynchon’s main characters and storylines, this study realizes a darker Gravity’s Rainbow than critics have been willing to see.
Download or read book Gravity s Ghost written by Harry Collins and published by University of Chicago Press. This book was released on 2011 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the leading chronicler of the search for gravitational waves, Harry Collins has been right there with the scientists since the start.
Download or read book Gravity s Revolt Part One written by William Guy and published by Xlibris Corporation. This book was released on 2001-01-09 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1975. Christopher Reed, a young minister in his first job, receives much-needed seasoning, is necessarily disillusioned. How? On one level by having an affair with Becky Grierson, one of his teen-aged parishioners. But the affair is begun on a theological dare so to speak, in order to test an intriguing vision of the freedom of the Gospel which Dr. Buttrick, the senior pastor under whom Reed works, a truly Christ-like man (though it depends, of course, on what your image of Jesus is) has presented. "Scrupulous," or guilt-stricken, Reed tells his wife Vinnie, an artist and a free-thinker, what he has done with Becky. Vinnie erupts, then curiously, over time, adjusts, gradually accommodates herself, allows the affair to continue. Reed also tells Dr. Buttrick what he has done. Great-spirited, a wise old man, a genius, Dr. Buttrick listens and counsels. He counsels both Reed and Vinnie. The three of them discuss the limits of marriage, the relevance of Christianity to same. Vinnie and Dr. Buttrick have their own intense relationship. Meanwhile the meteoric Becky moves through her senior year in high school, fights free of her youth and prepares to leave for college. Obsessed almost, Reed suffers at the prospect of "losing" her. And grows in some way as a person or at least as a pastor, learning to expect less of the flock which he supposedly leads, since if often acts less than nobly. Some members even turn on Dr. Buttrick, the genuinely good man, in the year of the novels action.
Download or read book Gravity s Revolt Part Three written by William Guy and published by Xlibris Corporation. This book was released on 2001-02-06 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1975. Christopher Reed, a young minister in his first job, receives much-needed seasoning, is necessarily dis-illusioned. How? On one level by having an affair with Becky, one of his teen-aged parishioners. But the affair begun on a theological dare so to speak, in order to test an intriguing vision of the freedom of the Gospel which Dr. Buttrick, the senior pastor under whom Reed works, a truly Christ-like man (though it depends, of course, on what your image of Jesus is) has presented. "Scrupulous," or guilt-stricken, Reed tells his wife Vinnie, an artist and a free thinker, what he has done with Becky. Vinnie erupts, then curiously adjusts, gradually accommodates herself, allows the affair to continue. Reed also tells Dr. Buttrick what he has done. Great- spirited, a wise old man, a genius, Dr. Buttrick listens and counsels. He counsels both Reed and Vinnie. The three of them discuss the limits of marriage, the relevance of Christianity to same. Vinnie and Dr. Buttrick have their own intense relationship. Meanwhile the meteoric Becky moves through her senior year in high school, fights free of her youth and prepares to leave for college. Obsessed almost, Reed suffers at the prospect of "losing" her. And grows in some ways as a person or at least as a pastor, learning to expect less of the flock which he supposedly leads, since it often acts less than nobly. Some members even turn on Dr. Buttrick, the genuinely good man, in the year of the novel's action.
