Galactic Evidence for Time-Scale of the Universe

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Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (338 download)

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Book Synopsis Galactic Evidence for Time-Scale of the Universe by : Subrahmanyan Chandrasekhar

Download or read book Galactic Evidence for Time-Scale of the Universe written by Subrahmanyan Chandrasekhar and published by . This book was released on 1944 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Selected Papers, Volume 3

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Publisher : University of Chicago Press
ISBN 13 : 9780226100944
Total Pages : 662 pages
Book Rating : 4.1/5 (9 download)

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Book Synopsis Selected Papers, Volume 3 by : S. Chandrasekhar

Download or read book Selected Papers, Volume 3 written by S. Chandrasekhar and published by University of Chicago Press. This book was released on 1989-10-23 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third of six volumes collecting significant papers of the distinguished astrophysicist and Nobel laureate S. Chandrasekhar. His work is notable for its breadth as well as for its brilliance; his practice has been to change his focus from time to time to pursue new areas of research. The result has been a prolific career full of discoveries and insights, some of which are only now being fully appreciated. Chandrasekhar has selected papers that trace the development of his ideas and that present aspects of his work not fully covered in the books he has periodically published to summarize his research in each area. This volume is divided into four sections. The first, on dynamical friction and Brownian motion, includes papers written after Chandrasekhar published his 1942 monograph Principles of Stellar Dynamics. Also in this section is "Stochastic Problems in Physics and Astronomy," one of the most cited papers in the physics literature, as well as papers written jointly with John von Neumann that have been given impetus to recent research. As Chandrasekhar notes, the papers in the second section, on statistical problems in astronomy, were influenced by Ambartsumian's analysis of brightness in the Milky Way. A third section on the statistical theory of turbulence addresses issues still unresolved in fluid dynamics, and the last section is devoted to hydromagnetic problems in astrophysics that are not discussed in Chandrasekhar's monographs.

Science and Creationism

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Publisher : National Academies Press
ISBN 13 : 9780309064064
Total Pages : 48 pages
Book Rating : 4.0/5 (64 download)

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Book Synopsis Science and Creationism by : National Academy of Sciences (U.S.)

Download or read book Science and Creationism written by National Academy of Sciences (U.S.) and published by National Academies Press. This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition of Science and Creationism summarizes key aspects of several of the most important lines of evidence supporting evolution. It describes some of the positions taken by advocates of creation science and presents an analysis of these claims. This document lays out for a broader audience the case against presenting religious concepts in science classes. The document covers the origin of the universe, Earth, and life; evidence supporting biological evolution; and human evolution. (Contains 31 references.) (CCM)

Galaxies & The Universe: Measuring Distance in the Universe Gr. 5-8

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Publisher : Classroom Complete Press
ISBN 13 : 1771677082
Total Pages : 27 pages
Book Rating : 4.7/5 (716 download)

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Book Synopsis Galaxies & The Universe: Measuring Distance in the Universe Gr. 5-8 by : Charlene Homer

Download or read book Galaxies & The Universe: Measuring Distance in the Universe Gr. 5-8 written by Charlene Homer and published by Classroom Complete Press. This book was released on 2015-09-01 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: **This is the chapter slice "Measuring Distance in the Universe" from the full lesson plan "Galaxies & The Universe"** Get the big picture about Galaxies and our Universe. From the smallest particles of matter to the biggest star system, our universe is made up of all things that exist in space. Our resource takes you through the Milky Way Galaxy, Black Holes and Gravity, then on to Nebulae, Sources of Light and the Speed of Light, and finally to Quasars, the most distant objects in the universe. Written using simplified language and vocabulary, our resource presents science concepts in a way that makes them accessible to students and easier to understand. Comprised of reading passages, student activities for before and after reading, hands-on activities, and color mini posters, our resource can be used effectively for test prep, whole-class, small group and independent work. All of our content is aligned to your State Standards and are written to Bloom's Taxonomy and STEM initiatives.

Cosmology

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Publisher : Oxford University Press
ISBN 13 : 9780198518846
Total Pages : 196 pages
Book Rating : 4.5/5 (188 download)

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Book Synopsis Cosmology by : Michael Rowan-Robinson

Download or read book Cosmology written by Michael Rowan-Robinson and published by Oxford University Press. This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Cosmology remains the classic introduction to modern cosmology for undergraduates. While designed as the main text for a course given at second or third year level, it is sufficiently self-contained for anyone with school science to understand. There is a strong emphasis on observational cosmology, with introductory chapters on the visible universe, our galaxy and other galaxies and the empirical basis for cosmological theory. After an account of the big bang model, there are chapters on the early stages of the big bang and galaxy formation. Finally, there are chapters on cosmological tests and on alternative theories. A feature of the book is its updated epilogue of twenty controversies in cosmology today. Latest results from the WMAP mission have been added and a wealth of new material, including a stronger emphasis on the cosmological constant. The book has an extensive glossary and the exercises have been substantially expanded. A strongest emphasis on the physical basis for cosmology is included."--BOOK JACKET.

Galaxies

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Publisher : John Wiley & Sons
ISBN 13 : 1119817994
Total Pages : 288 pages
Book Rating : 4.1/5 (198 download)

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Book Synopsis Galaxies by : Francoise Combes

Download or read book Galaxies written by Francoise Combes and published by John Wiley & Sons. This book was released on 2021-03-05 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galaxies are vast ensembles of stars, gas and dust, embedded in dark matter halos. They are the basic building blocks of the Universe, gathered in groups, clusters and super-clusters. They exist in many forms, either as spheroids or disks. Classifications, such as the Hubble sequence (based on mass concentration and gas fraction) and the colormagnitude diagram (which separates a blue cloud from a red sequence) help to understand their formation and evolution. Galaxies spend a large part of their lives in the blue cloud, forming stars as spiral or dwarf galaxies. Then, via a mechanism that is still unclear, they stop forming stars and quietly end in the red sequence, as spheroids. This transformation may be due to galaxy interactions, or because of the feedback of active nuclei, through the energy released by their central super-massive black holes. These mechanisms could explain the history of cosmic star formation, the rate of which was far greater in the first half of the UniverseÂs life. Galaxies delves into all of these surrounding subjects in six chapters written by dedicated, specialist astronomers and researchers in the field, from their numerical simulations to their evolutions.

Einstein's Error

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Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.6/5 (51 download)

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Book Synopsis Einstein's Error by : Colin Gordon

Download or read book Einstein's Error written by Colin Gordon and published by . This book was released on 2020-06-04 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two branches of physics have diverged to the point that they are now in direct conflict. The theory of Special Relativity, proposed by Einstein in 1905, claimed that motion is purely relative, that for two bodies moving with constant velocities their motion is a relation between them and not a property of one or the other; there is no body absolutely at rest to which the motion of each can be referred. At that time the universe was believed to consist only of our own galaxy, the Milky Way, but in the following decades astronomical observations revealed a vast number of galaxies outside of our own stretching into the far reaches of space. Their spectral red-shifts indicated their velocities of recession from us and these were found to be proportional to their distances. This was evidence for an expanding universe in which a local rest frame is defined as that in which the galactic red-shifts and the microwave background radiation are the same in all directions. Any deviation from this isotropy would be a measure of the observer's motion through the cosmos. This is a clear conflict between theory and observation that needs to be resolved. It is found that the problem arises from an error in Einstein's original paper concerning the properties of time. He concluded that if a clock A is moved at constant velocity to a second clock B its motion causes it to run slow so that, on arrival, A's clock indicates an earlier time than B's. But if motion is purely relative the relation between A and B is symmetrical so we could equally well conclude that B's clock is slower than A's. The only possible outcome consistent with the principle of relativity is that the clocks agree when they meet. For this reason and others the effect know as time dilation is an invalid deduction from the theory. This being so a clock is unaffected by motion and remote clocks can be synchronized by transportation of a standard clock from one to the other. In this way a lattice of synchronized clocks can be set up to form a universal time scale. Combining this with the fundamental hypothesis of space-time, that the speed of light is invariant, leads to a theory based on the Voigt transformation rather than that of Lorentz. This modified theory contains a preferred inertial frame and a universal time, features that correspond to the those of the real universe. According to the Big Bang theory all matter was originally compressed into a small volume and at time zero began a uniform expansion, leading to a universe which is always homogeneous and isotropic. To an observer moving with local matter, known as the Hubble flow, the recession of the galaxies is the same in all directions. The Hubble flow defines the local rest frame and the uniform aging of all matter defines a universal cosmic time. Clearly this theory of Cosmic Space-time agrees closely with the observed properties of the universe. It is based on the Voigt transformation which differs from the Lorentz transformation only by a constant factor; consequently most of their physical properties are the same, including the invariance of the laws of physics and the equivalence of mass and energy. So nearly all the experimental and observational evidence that supports relativity theory also supports cosmic space-time. A few experiments claim to measure time dilation but this is not predicted by relativity theory so we must look elsewhere for an explanation of these results.

A Framework for K-12 Science Education

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Publisher : National Academies Press
ISBN 13 : 0309214459
Total Pages : 400 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis A Framework for K-12 Science Education by : National Research Council

Download or read book A Framework for K-12 Science Education written by National Research Council and published by National Academies Press. This book was released on 2012-02-28 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science, engineering, and technology permeate nearly every facet of modern life and hold the key to solving many of humanity's most pressing current and future challenges. The United States' position in the global economy is declining, in part because U.S. workers lack fundamental knowledge in these fields. To address the critical issues of U.S. competitiveness and to better prepare the workforce, A Framework for K-12 Science Education proposes a new approach to K-12 science education that will capture students' interest and provide them with the necessary foundational knowledge in the field. A Framework for K-12 Science Education outlines a broad set of expectations for students in science and engineering in grades K-12. These expectations will inform the development of new standards for K-12 science education and, subsequently, revisions to curriculum, instruction, assessment, and professional development for educators. This book identifies three dimensions that convey the core ideas and practices around which science and engineering education in these grades should be built. These three dimensions are: crosscutting concepts that unify the study of science through their common application across science and engineering; scientific and engineering practices; and disciplinary core ideas in the physical sciences, life sciences, and earth and space sciences and for engineering, technology, and the applications of science. The overarching goal is for all high school graduates to have sufficient knowledge of science and engineering to engage in public discussions on science-related issues, be careful consumers of scientific and technical information, and enter the careers of their choice. A Framework for K-12 Science Education is the first step in a process that can inform state-level decisions and achieve a research-grounded basis for improving science instruction and learning across the country. The book will guide standards developers, teachers, curriculum designers, assessment developers, state and district science administrators, and educators who teach science in informal environments.

Astronomy and Astrophysics in the New Millennium

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Publisher : National Academies Press
ISBN 13 : 0309070376
Total Pages : 401 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Astronomy and Astrophysics in the New Millennium by : National Research Council

Download or read book Astronomy and Astrophysics in the New Millennium written by National Research Council and published by National Academies Press. This book was released on 2002-02-07 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: In preparing the report, Astronomy and Astrophysics in the New Millenium , the AASC made use of a series of panel reports that address various aspects of ground- and space-based astronomy and astrophysics. These reports provide in-depth technical detail. Astronomy and Astrophysics in the New Millenium: An Overview summarizes the science goals and recommended initiatives in a short, richly illustrated, non-technical booklet.

An Introduction to Galaxies and Cosmology

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Publisher : Cambridge University Press
ISBN 13 : 9780521546232
Total Pages : 452 pages
Book Rating : 4.5/5 (462 download)

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Book Synopsis An Introduction to Galaxies and Cosmology by : David John Adams

Download or read book An Introduction to Galaxies and Cosmology written by David John Adams and published by Cambridge University Press. This book was released on 2004-05-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory textbook has been designed by a team of experts for elementary university courses in astronomy and astrophysics. It starts with a detailed discussion of the structure and history of our own Galaxy, the Milky Way, and goes on to give a general introduction to normal and active galaxies including models for their formation and evolution. The second part of the book provides an overview of the wide range of cosmological models and discusses the Big Bang and the expansion of the Universe. Written in an accessible style that avoids complex mathematics, and illustrated in colour throughout, this book is suitable for self-study and will appeal to amateur astronomers as well as undergraduate students. It contains numerous helpful learning features such as boxed summaries, student exercises with full solutions, and a glossary of terms. The book is also supported by a website hosting further teaching materials.

Connecting Quarks with the Cosmos

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Publisher : National Academies Press
ISBN 13 : 030917113X
Total Pages : 222 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Connecting Quarks with the Cosmos by : National Research Council

Download or read book Connecting Quarks with the Cosmos written by National Research Council and published by National Academies Press. This book was released on 2003-03-12 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances made by physicists in understanding matter, space, and time and by astronomers in understanding the universe as a whole have closely intertwined the question being asked about the universe at its two extremesâ€"the very large and the very small. This report identifies 11 key questions that have a good chance to be answered in the next decade. It urges that a new research strategy be created that brings to bear the techniques of both astronomy and sub-atomic physics in a cross-disciplinary way to address these questions. The report presents seven recommendations to facilitate the necessary research and development coordination. These recommendations identify key priorities for future scientific projects critical for realizing these scientific opportunities.

A Question and Answer Guide to Astronomy

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Publisher : Cambridge University Press
ISBN 13 : 131661526X
Total Pages : 361 pages
Book Rating : 4.3/5 (166 download)

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Book Synopsis A Question and Answer Guide to Astronomy by : Pierre-Yves Bely

Download or read book A Question and Answer Guide to Astronomy written by Pierre-Yves Bely and published by Cambridge University Press. This book was released on 2017-03-23 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 250 questions and answers about astronomy, particular for the amateur astronomer.

Relativistic Cosmology

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Publisher : Cambridge University Press
ISBN 13 : 0521381150
Total Pages : 637 pages
Book Rating : 4.5/5 (213 download)

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Book Synopsis Relativistic Cosmology by : George F. R. Ellis

Download or read book Relativistic Cosmology written by George F. R. Ellis and published by Cambridge University Press. This book was released on 2012-03-22 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveying key developments and open issues in cosmology for graduate students and researchers, this book focuses on the general concepts and relations that underpin the standard model of the Universe. It also examines anisotropic and inhomogeneous models, and deeper issues, such as quantum cosmology and the multiverse proposal.

Galaxies: A Very Short Introduction

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Publisher : Oxford University Press, USA
ISBN 13 : 0199234345
Total Pages : 137 pages
Book Rating : 4.1/5 (992 download)

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Book Synopsis Galaxies: A Very Short Introduction by : John Gribbin

Download or read book Galaxies: A Very Short Introduction written by John Gribbin and published by Oxford University Press, USA. This book was released on 2008-03-27 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this fascinating Very Short Introduction, popular science writer John Gribben tells the story of our growing understanding of galaxies, from the days before Galileo to our present-day observations of our many hundreds of millions of galactic neighbors. Not only are galaxies fascinating astronomical structures in themselves, but their study has revealed much of what we know today about the cosmos, providing a window on the Big Bang and the origins of the Universe. Gribben looks at our own "Milky Way" Galaxy in detail, from the different kinds of stars that are born within it, to the origins of its magnificent spiral structure. Perhaps most interesting, Gribben describes the many exciting discoveries have been made about our own galaxy and about those beyond: how a supermassive black hole lurks at the center of every galaxy, how enormous forces are released when galaxies collide, how distant galaxies provide a window on the early Universe, and how the formation of young galaxies shed needed light on the mysteries of Cold Dark Matter. John Gribbin is one of the best-known current popular science writers. His many books include the acclaimed The Universe: A Biography, In Search of Schrodinger's Cat, and Science: A History. He has written for many newspapers and regularly contributes to radio and television documentaries and debates, and also writes science fiction novels. He formerly worked for Nature and New Scientist and is presently a Visiting Fellow in Astronomy at the University of Sussex. 1. A Very Short Introduction 2. The Great Debate 3. Our Island 4. The Expanding Universe 5. Across the Universe 6. The Origin of Galaxies 7. The Universe at Large References & Further Reading Index

Galaxy Formation

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Publisher : Springer Science & Business Media
ISBN 13 : 3540734783
Total Pages : 741 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Galaxy Formation by : Malcolm S. Longair

Download or read book Galaxy Formation written by Malcolm S. Longair and published by Springer Science & Business Media. This book was released on 2007-11-13 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: Delineating the huge strides taken in cosmology in the past ten years, this much-anticipated second edition of Malcolm Longair's highly appreciated textbook has been extensively and thoroughly updated. It tells the story of modern astrophysical cosmology from the perspective of one of its most important and fundamental problems – how did the galaxies come about? Longair uses this approach to introduce the whole of what may be called "classical cosmology". What’s more, he describes how the study of the origin of galaxies and larger-scale structures in the Universe has provided us with direct information about the physics of the very early Universe.

Edge of the Universe

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Publisher : Turner Publishing Company
ISBN 13 : 111823460X
Total Pages : 228 pages
Book Rating : 4.1/5 (182 download)

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Book Synopsis Edge of the Universe by : Paul Halpern

Download or read book Edge of the Universe written by Paul Halpern and published by Turner Publishing Company. This book was released on 2012-08-10 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible look at the mysteries that lurk at the edge of the known universe and beyond The observable universe, the part we can see with telescopes, is incredibly vast. Yet recent theories suggest that there is far more to the universe than what our instruments record—in fact, it could be infinite. Colossal flows of galaxies, large empty regions called voids, and other unexplained phenomena offer clues that our own "bubble universe" could be part of a greater realm called the multiverse. How big is the observable universe? What it is made of? What lies beyond it? Was there a time before the Big Bang? Could space have unseen dimensions? In this book, physicist and science writer Paul Halpern explains what we know?and what we hope to soon find out?about our extraordinary cosmos. Explains what we know about the Big Bang, the accelerating universe, dark energy, dark flow, and dark matter to examine some of the theories about the content of the universe and why its edge is getting farther away from us faster Explores the idea that the observable universe could be a hologram and that everything that happens within it might be written on its edge Written by physicist and popular science writer Paul Halpern, whose other books include Collider: The Search for the World's Smallest Particles, and What's Science Ever Done For Us: What the Simpsons Can Teach Us About Physics, Robots, Life, and the Universe

Physics in a New Era

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Publisher : National Academies Press
ISBN 13 : 0309073421
Total Pages : 203 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Physics in a New Era by : National Research Council

Download or read book Physics in a New Era written by National Research Council and published by National Academies Press. This book was released on 2001-07-15 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics at the beginning of the twenty-first century has reached new levels of accomplishment and impact in a society and nation that are changing rapidly. Accomplishments have led us into the information age and fueled broad technological and economic development. The pace of discovery is quickening and stronger links with other fields such as the biological sciences are being developed. The intellectual reach has never been greater, and the questions being asked are more ambitious than ever before. Physics in a New Era is the final report of the NRC's six-volume decadal physics survey. The book reviews the frontiers of physics research, examines the role of physics in our society, and makes recommendations designed to strengthen physics and its ability to serve important needs such as national security, the economy, information technology, and education.