Space Time

Einstein's General Theory of Relativity leads to two remarkable predictions: first, that the ultimate destiny of many massive stars is to undergo gravitational collapse and to disappear from view, leaving behind a 'black hole' in space; and secondly, that there will exist singularities in space-time itself. These singularities are places where space-time begins or ends, and the presently known laws of physics break down. They will occur inside black holes, and in the past are what might be construed as the beginning of the universe. To show how these predictions arise, the authors discuss the General Theory of Relativity in the large. Starting with a precise formulation of the theory and an account of the necessary background of differential geometry, the significance of space-time curvature is discussed and the global properties of a number of exact solutions of Einstein's field equations are examined. The theory of the causal structure of a general space-time is developed, and is used to study black holes and to prove a number of theorems establishing the inevitability of singualarities under certain conditions. A discussion of the Cauchy problem for General Relativity is also included in this 1973 book.

As the enduring "last frontier," Alaska proves an indispensable context for examining the form and function of American colonialism, particularly in the shift from western continental expansion to global empire. In this richly theorized work, Juliana Hu Pegues evaluates four key historical periods in U.S.-Alaskan history: the Alaskan purchase, the Gold Rush, the emergence of salmon canneries, and the World War II era. In each, Hu Pegues recognizes colonial and racial entanglements between Alaska Native peoples and Asian immigrants. In the midst of this complex interplay, the American colonial project advanced by differentially racializing and gendering Indigenous and Asian peoples, constructing Asian immigrants as "out of place" and Alaska Natives as "out of time." Counter to this space-time colonialism, Native and Asian peoples created alternate modes of meaning and belonging through their literature, photography, political organizing, and sociality. Offering an intersectional approach to U.S. empire, Indigenous dispossession, and labor exploitation, Space-Time Colonialism makes clear that Alaska is essential to understanding both U.S. imperial expansion and the machinations of settler colonialism.

In this book, Lawrence Sklar demonstrates the interdependence of science and philosophy by examining a number of crucial problems on the nature of space and time—problems that require for their resolution the resources of philosophy and of physics. The overall issues explored are our knowledge of the geometry of the world, the existence of spacetime as an entity over and above the material objects of the world, the relation between temporal order and causal order, and the problem of the direction of time. Without neglecting the most subtle philosophical points or the most advanced contributions of contemporary physics, the author has taken pains to make his explorations intelligible to the reader with no advanced training in physics, mathematics, or philosophy. The arguments are set forth step-by-step, beginning from first principles; and the philosophical discussions are supplemented in detail by nontechnical expositions of crucial features of physical theories.

Dedicated to the centennial anniversary of Minkowski's discovery of spacetime, this volume contains papers, most presented at the Third International Conference on the Nature and Ontology of Spacetime, that address some of the deepest questions in physics.

Travel to planets unknown in book two of the Space-Time graphic novel series from the author of the New York Times bestselling Jedi Academy books! Jide, Petra, and their intergalactic friends are back on the Potato (their orbiting classroom) for another out-of-this-world adventure. Their latest space mission brings them to the home planets of their schoolmates, where pranks must be avenged, new terrains must be explored, and the patience of Commander G must be tested! Buckle up! The next Space-Time series mission from New York Times bestselling author Jeffrey Brown is ready for blast off!

In this compendium of essays, some of the world’s leading thinkers discuss their conceptions of space and time, as viewed through the lens of their own discipline. With an epilogue on the limits of human understanding, this volume hosts contributions from six or more diverse fields. It presumes only rudimentary background knowledge on the part of the reader. Time and again, through the prism of intellect, humans have tried to diffract reality into various distinct, yet seamless, atomic, yet holistic, independent, yet interrelated disciplines and have attempted to study it contextually. Philosophers debate the paradoxes, or engage in meditations, dialogues and reflections on the content and nature of space and time. Physicists, too, have been trying to mold space and time to fit their notions concerning micro- and macro-worlds. Mathematicians focus on the abstract aspects of space, time and measurement. While cognitive scientists ponder over the perceptual and experiential facets of our consciousness of space and time, computer scientists theoretically and practically try to optimize the space-time complexities in storing and retrieving data/information. The list is never-ending. Linguists, logicians, artists, evolutionary biologists, geographers etc., all are trying to weave a web of understanding around the same duo. However, our endeavour into a world of such endless imagination is restrained by intellectual dilemmas such as: Can humans comprehend everything? Are there any limits? Can finite thought fathom infinity? We have sought far and wide among the best minds to furnish articles that provide an overview of the above topics. We hope that, through this journey, a symphony of patterns and tapestry of intuitions will emerge, providing the reader with insights into the questions: What is Space? What is Time? Chapter [15] of this book is available open access under a CC BY 4.0 license.

Gets to the heart of science by asking a fundamental question: what is the true nature of space and time?

Writing for the general reader or student, Wald has completely revised and updated this highly regarded work to include recent developments in black hole physics and cosmology. Nature called the first edition "a very readable and accurate account of modern relativity physics for the layman within the unavoidable constraint of almost no mathematics. . . . A well written, entertaining and authoritative book."