Kosmologi og universet

The book is about exact space-time models of the gravitational fields produced by gravitational radiation. The authors' extensive work in the field is reviewed in order to stimulate the study of such models, that have been known for a long time, and to highlight interesting physical aspects of the existing models in some novel detail. There is an underlying simplicity to the gravitational radiation studied in this book. Apart from the basic assumption that the radiation has clearly identifiable wave fronts, the gravitational waves studied are directly analogous to electromagnetic waves. The book is meant for advanced students and researchers who have a knowledge of general relativity sufficient to carry out research in the field.

The birth of the Universe, and its subsequent evolution, is an exciting blend of Cosmology, Particle Physics and Thermodynamics. This book, with its synoptic approach, provides an accessible introduction to these fascinating topics. It begins in Part I with an overview of cosmology and is followed by a discussion on the present understanding about the birth of the universe, detailing the Planck Era, Inflation, and the Big Bang. It speculates the possibility of multiple universes. Before moving on to explore the essentials of the Standard Model of Particle Physics in Part II, with particular stress on the electroweak force, the first example of acquisition of mass by gauge bosons via the Higgs mechanism. The book finishes in Part III with the thermal history of the Universe. This will also lead to understanding baryonic matter and baryogenesis as well as nucleosynthesisThis book is suitable for those taking courses on particle physics, general relativity, and cosmology. Readers mathematically inclined who wish to enhance their basic knowledge about the early Universe, will also find this book suitable to move up to the next level.Features:Authored by experienced lecturers in Particle Physics, Quantum Field Theory, Nuclear Physics, and General RelativityProvides an accessible introduction to Particle Physics and Cosmology

Every night, above our heads, a drama of epic proportions is playing out. Diamond planets, zombie stars, black holes heavier than a billion Suns. The cast of characters is extraordinary, and each one has its own incredible story to tell.

Few biblical expositors have a scientific background, and fewer still are the scientists who believe that the Bible is the true word of God. In Hebrews 11:3, we are told "By faith we understand that what is seen has not been made out of things that are visible." Recent discoveries made using the Hubble Deep Space Telescope have exposed significant errors in the big bang theory while showing the biblical account of creation to be credible. So what are we to believe? A thinking person simply cannot hold such radically contrasting beliefs concurrently. A choice must be made. Secrets of the Creation by Duane O. Wilson takes commonly held scientific "truths" and expounds on them from a biblical and physics perspective. This book contains original visual material, specifically, tables and schematics regarding types of angels and levels of Heaven, respectively. Wilson begins by front-loading the reader with information about creation according to the Bible, then he follows up with information regarding creation using physics and formulas. In this book, Wilson holds to the view that the Bible is accurate and inerrant as originally written and that science must be proven by experiment to be true. Our pastors, parents, and professors did not tell us the whole truth. A fresh look at the wealth of information using the Blue Letter Bible, Strong's Concordance, NASA Space Telescope measurements, and 2 Enoch shed new information that illuminates and modifies our view of creation and cosmology. A deeper delve into the words of the Bible and a closer scrutiny of the claims of modern cosmology are required to better understand the truth of creation.

"First published in 1973, this influential work discusses Einstein's General Theory of Relativity to show how two of its predictions arise: first, that the ultimate fate of many massive stars is to undergo gravitational collapse to form 'black holes'; and second, that there was a singularity in the past at the beginning of the universe. Starting with a precise formulation of the theory, including the necessary differential geometry, the authors discuss the significance of spacetime curvature and examine the properties of a number of exact solutions of Einstein's field equations. They develop the theory of the causal structure of a general spacetime, and use it to prove a number of theorems establishing the inevitability of singularities under certain conditions. A foreword contributed by Abhay Ashtekar and a new preface from George Ellis help put the volume into context of the developments in the field over the past 50 years"--

This textbook presents a detailed introduction to the general concepts of quantum field theory, with special emphasis on principal aspects of functional methods and renormalization in gauge theories, and includes an introduction to semiclassical and perturbative quantum gravity in flat and curved spacetimes.

This book tells the story of how, over the past century, dedicated observers and pioneering scientists achieved our current understanding of the universe. It was in antiquity that humankind first attempted to explain the universe often with the help of myths and legends. This book, however, focuses on the time when cosmology finally became a true science. As the reader will learn, this was a slow process, extending over a large part of the 20th century and involving many astronomers, cosmologists and theoretical physicists. The book explains how empirical astronomical data (e.g., Leavitt, Slipher and Hubble) were reconciled with Einstein's general relativity; a challenge which finally led Friedmann, De Sitter and Lemaître, and eventually Einstein himself, to a consistent understanding of the observational results. The reader will realize the extraordinary implications of these achievements and howdeeply they changed our vision of the cosmos: From being small, static, immutable and eternal, it became vast and dynamical - originating from (almost) nothing, and yet now, nearly 14 billion years later, undergoing accelerated expansion. But, as always happens, as well as precious knowledge, new mysteries have also been created where previously absolute certainty had reigned.

Embark on your own personal journey into the night sky. Stardate: Today!Ever catch yourself staring up at the night sky and wondering just what the heck is out there? While no one book can answer all your questions, Astronomy For Dummies will take you on a tour through the Milky Way (and beyond!) that describes some of the most fascinating objects in the universe.This book comes complete with online access to chapter quizzes and downloadable full-color astronomical photos of our universe, as well as easy-to-follow explanations of the eye-popping wonders and gorgeous interstellar objects that populate our solar system, galaxy, and universe. You'll find:* Brand-new star charts for the northern and southern hemispheres, as well as descriptions of the latest tech tools for amateur astronomers* Lists of the most recently discovered exoplanets, exomoons, and exocomets hurtling through the cosmos* The latest timelines for dazzling solar events and maps to the best places to see them live and in-personFilled with discussions of the biggest and greatest new breakthroughs and an 8-page color insert packed with unbelievable, full-color photographs, Astronomy For Dummies is a can't-miss book that will ignite a passion for understanding the mysteries of the universe in children and adults alike!