The Shadow Of The Black Hole

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The Shadow of Black Holes

Arne Grenzebach
The Shadow of Black Holes Book PDF

Author : Arne Grenzebach
Publisher : Springer
Page : 94 pages
File Size : 50,9 Mb
Release : 2016-05-07
Category : Science
ISBN : 9783319300665

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The Shadow of Black Holes by Arne Grenzebach Pdf

This book introduces an analytic method to describe the shadow of black holes. As an introduction, it presents a survey of the attempts to observe the shadow of galactic black holes. Based on a detailed discussion of the Plebański–Demiański class of space-times, the book derives analytical formulas for the photon regions and for the boundary curve of the shadow as seen by an observer in the domain of outer communication. It also analyzes how the shadow depends on the motion of the observer. For all cases, the photon regions and shadows are visualized for various values of the parameters. Finally, it considers how the analytical formulas can be used for calculating the horizontal and vertical angular diameters of the shadow, and estimates values for the black holes at the centers of our Galaxy near Sgr A* and of the neighboring galaxy M87.

The Shadow of the Black Hole

John W. Moffat
The Shadow of the Black Hole Book PDF

Author : John W. Moffat
Publisher : Oxford University Press, USA
Page : 233 pages
File Size : 47,7 Mb
Release : 2020
Category : Science
ISBN : 9780190650728

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The Shadow of the Black Hole by John W. Moffat Pdf

"Black holes are one of the extraordinary phenomena in the universe whose existence was surmised not by observations, but by theory. The black hole is a prediction of Einstein's 1915-1916 gravitational theory, general relativity, which replaced Sir Isaac Newton's gravity theory, published in his famous treatise Principia in 1687. In 1784, Reverend John Michell, a fellow of Queens' College and Professor of Geology at Cambridge University, had already envisioned what we now call black holes. He asked what would happen if a star's gravity were so strong that its escape velocity - the speed at which a rocket, for example, would have to travel to leave the star - exceeded the speed of light? Michell realized that any light emanating from the star would have to fall back to its surface. He speculated that the escape velocity would exceed the speed of light for a very massive star, making the star invisible to an observer"--

Einstein's Shadow

Seth Fletcher
Einstein s Shadow Book PDF

Author : Seth Fletcher
Publisher : HarperCollins
Page : 309 pages
File Size : 51,5 Mb
Release : 2018-10-09
Category : Science
ISBN : 9780062312037

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Einstein's Shadow by Seth Fletcher Pdf

Einstein’s Shadow follows a team of elite scientists on their historic mission to take the first picture of a black hole, putting Einstein’s theory of relativity to its ultimate test and helping to answer our deepest questions about space, time, the origins of the universe, and the nature of reality Photographing a black hole sounds impossible, a contradiction in terms. But Shep Doeleman and a global coalition of scientists are on the cusp of doing just that. With exclusive access to the team, journalist Seth Fletcher spent five years following Shep and an extraordinary cast of characters as they assembled the Event Horizon Telescope, a worldwide network of radio telescopes created to study black holes. He witnessed the team’s struggles, setbacks, and breakthroughs, and, along the way, Fletcher explored the latest thinking on the most profound questions about black holes: Do they represent a limit to our ability to understand reality? Or will they reveal the clues that lead to the long-sought theory of everything? Fletcher transforms astrophysics into something exciting, accessible, and immediate, taking us on an incredible adventure to better understand the complexity of our galaxy, the boundaries of human perception and knowledge, and how the messy endeavor of science really works. Weaving a compelling narrative account of human ingenuity with excursions into cutting-edge science, Einstein’s Shadow is a tale of great minds on a mission to change the way we understand our universe—and our place in it.

The Shadow of the Black Hole

John W. Moffat
The Shadow of the Black Hole Book PDF

Author : John W. Moffat
Publisher : Oxford University Press
Page : 304 pages
File Size : 53,7 Mb
Release : 2020-06-16
Category : Science
ISBN : 9780190650742

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The Shadow of the Black Hole by John W. Moffat Pdf

Black holes entered the world of science fiction and films in the 1960s, and their popularity in our culture remains today. The buzz surrounding black holes was and is due, in large part, to their speculative nature. It is still difficult for the general public to determine fact versus fiction as it pertains to this terrifying idea: something big enough to swallow anything and everything in close proximity, with a gravitational force so strong that nothing, including light, can escape. In the fall of 2015, scientists at the Laser Interferometry Gravitational-Wave Observatory (LIGO) detected the first sounds from black holes, brought to earth by the gravitational waves that emitted from the merging of two black holes 1.4 billion light years away in space. This confirmed the existence of gravitational waves, which Albert Einstein predicted in 1916. In the spring of 2017, physicists and astronomers who were working on the Event Horizon Telescope (EHT) project captured the first image of a black hole. This was the supermassive black hole hosted by the galaxy M87 in the constellation Virgo, 53 million light years away, and the image shows the shadow the black hole casts upon the bright light surrounding it. In this book, John Moffat shares the history of black holes and presents the latest research into these mysterious celestial objects, including the astounding results from gravitational wave detection and the shadow of the black hole.

Death by Black Hole: And Other Cosmic Quandaries

Neil deGrasse Tyson
Death by Black Hole And Other Cosmic Quandaries Book PDF

Author : Neil deGrasse Tyson
Publisher : W. W. Norton & Company
Page : 384 pages
File Size : 52,6 Mb
Release : 2007-11-17
Category : Science
ISBN : 9780393113785

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Death by Black Hole: And Other Cosmic Quandaries by Neil deGrasse Tyson Pdf

"[Tyson] tackles a great range of subjects…with great humor, humility, and—most important—humanity." —Entertainment Weekly Loyal readers of the monthly "Universe" essays in Natural History magazine have long recognized Neil deGrasse Tyson's talent for guiding them through the mysteries of the cosmos with clarity and enthusiasm. Bringing together more than forty of Tyson's favorite essays, Death by Black Hole explores a myriad of cosmic topics, from what it would be like to be inside a black hole to the movie industry's feeble efforts to get its night skies right. One of America's best-known astrophysicists, Tyson is a natural teacher who simplifies the complexities of astrophysics while sharing his infectious fascination for our universe.

Light in the Darkness

Heino Falcke,Jörg Römer
Light in the Darkness Book PDF

Author : Heino Falcke,Jörg Römer
Publisher : HarperCollins
Page : 405 pages
File Size : 44,9 Mb
Release : 2021-05-04
Category : Science
ISBN : 9780063020078

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Light in the Darkness by Heino Falcke,Jörg Römer Pdf

The International Bestseller On April 10, 2019, award-winning astrophysicist Heino Falcke presented the first image ever captured of a black hole at an international press conference—a turning point in astronomy that Science magazine called the scientific breakthrough of the year. That photo was captured with the unthinkable commitment of an intercontinental team of astronomers who transformed the world into a global telescope. While this image achieved Falcke’s goal in making a black hole “visible” for the first time, he recognizes that the photo itself asks more questions for humanity than it answers. Light in the Darkness takes us on Falcke’s extraordinary journey to the darkest corners of the universe. From the first humans looking up at the night sky to modern astrophysics, from the study of black holes to the still-unsolved mysteries of the universe, Falcke asks, in even the greatest triumphs of science, is there room for doubts, faith, and a God? A plea for curiosity and humility, Light in the Darkness sees one of the great minds shaping the world today as he ponders the big, pressing questions that present themselves when we look up at the stars.

Regular Black Holes

Cosimo Bambi
Regular Black Holes Book PDF

Author : Cosimo Bambi
Publisher : Springer Nature
Page : 505 pages
File Size : 52,7 Mb
Release : 2023-07-06
Category : Science
ISBN : 9789819915965

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Regular Black Holes by Cosimo Bambi Pdf

Black holes are one of the most fascinating predictions of general relativity. They are the natural product of the complete gravitational collapse of matter and today we have a body of observational evidence supporting the existence of black holes in the Universe. However, general relativity predicts that at the center of black holes there are spacetime singularities, where predictability is lost and standard physics breaks down. It is widely believed that spacetime singularities are a symptom of the limitations of general relativity and must be solved within a theory of quantum gravity. Since we do not have yet any mature and reliable candidate for a quantum gravity theory, researchers have studied toy-models of singularity-free black holes and of singularity-free gravitational collapses in order to explore possible implications of the yet unknown theory of quantum gravity. This book reviews all main models of regular black holes and non-singular gravitational collapses proposed in the literature, and discuss the theoretical and observational implications of these scenarios.

Introduction to Black Hole Astrophysics

Gustavo E. Romero,Gabriela S. Vila
Introduction to Black Hole Astrophysics Book PDF

Author : Gustavo E. Romero,Gabriela S. Vila
Publisher : Springer
Page : 318 pages
File Size : 48,7 Mb
Release : 2013-09-14
Category : Science
ISBN : 9783642395963

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Introduction to Black Hole Astrophysics by Gustavo E. Romero,Gabriela S. Vila Pdf

This book is based on the lecture notes of a one-semester course on black hole astrophysics given by the author and is aimed at advanced undergraduate and graduate students with an interest in astrophysics. The material included goes beyond that found in classic textbooks and presents details on astrophysical manifestations of black holes. In particular, jet physics and detailed accounts of objects like microquasars, active galactic nuclei, gamma-ray bursts, and ultra-luminous X-ray sources are covered, as well as advanced topics like black holes in alternative theories of gravity. The author avoids unnecessary technicalities and to some degree the book is self-contained. The reader will find some basic general relativity tools in Chapter 1. The appendices provide some additional mathematical details that will be useful for further study, and a guide to the bibliography on the subject.

Shadow on the Sun

David Macinnis Gill
Shadow on the Sun Book PDF

Author : David Macinnis Gill
Publisher : Harper Collins
Page : 275 pages
File Size : 42,6 Mb
Release : 2013-03-26
Category : Young Adult Fiction
ISBN : 9780062073372

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Shadow on the Sun by David Macinnis Gill Pdf

A sci-fi thrill ride—incredible action, inventive world-building, deadly humor, and more—for fans of movie classics such as Blade Runner and Mad Max! This is the companion to Invisible Sun and Black Hole Sun, which Suzanne Collins, the author of The Hunger Games, called "imaginative and action-packed." Characters return, new characters are introduced, and the action never stops. Readers embraced the first two books in acclaimed author David Macinnis Gill's trilogy about Durango, Mimi (his nano-implant with a biting wit), and Vienne (his second-in-command), calling the books non-put-downable, thrilling, funny, and totally satisfying. A surefire bet for fans of dystopian sci-fi, from The Hunger Games to Battlestar Galactica. Cinematic action, rapid-fire dialogue, a futuristic setting on a terraformed Mars, and tragic romance—Shadow on the Sun is an unstoppable adrenaline rush!

Einstein's Shadow

Seth Fletcher
Einstein s Shadow Book PDF

Author : Seth Fletcher
Publisher : Ecco
Page : 288 pages
File Size : 46,5 Mb
Release : 2019-10-15
Category : Science
ISBN : 0062312049

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Einstein's Shadow by Seth Fletcher Pdf

A NEW YORK TIMES EDITOR'S CHOICE Einstein’s Shadow follows a team of elite scientists on their historic mission to take the first picture of a black hole, putting Einstein’s theory of relativity to its ultimate test and helping to answer our deepest questions about space, time, the origins of the universe, and the nature of reality Photographing a black hole sounds impossible, a contradiction in terms. But Shep Doeleman and a global coalition of scientists are on the cusp of doing just that. With exclusive access to the team, journalist Seth Fletcher spent five years following Shep and an extraordinary cast of characters as they assembled the Event Horizon Telescope, a virtual radio observatory the size of the Earth. He witnessed their struggles, setbacks, and breakthroughs, and along the way, he explored the latest thinking on the most profound questions about black holes. Do they represent a limit to our ability to understand reality? Or will they reveal the clues that lead to the long-sought Theory of Everything? Fletcher transforms astrophysics into something exciting, accessible, and immediate, taking us on an incredible adventure to better understand the complexity of our galaxy, the boundaries of human perception and knowledge, and how the messy human endeavor of science really works. Weaving a compelling narrative account of human ingenuity with excursions into cutting-edge science, Einstein’s Shadow is a tale of great minds on a mission to change the way we understand our universe—and our place in it.

Black Hole Chasers

Anna Crowley Redding
Black Hole Chasers Book PDF

Author : Anna Crowley Redding
Publisher : Feiwel & Friends
Page : 176 pages
File Size : 51,9 Mb
Release : 2021-10-05
Category : Juvenile Nonfiction
ISBN : 9781250622334

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Black Hole Chasers by Anna Crowley Redding Pdf

In Black Hole Chasers, award-winning investigative journalist Anna Crowley Redding presents the riveting true story of one of the most inspiring scientific breakthroughs of our lifetime—the Event Horizon Telescope team's reveal of the first image of a super massive black hole. In April 2019, the Event Horizon Telescope Team unveiled the first ever image of a super massive black hole. This inspiring scientific breakthrough took years of hard work, innovative thinking, and a level of global cooperation never seen before. The challenge was immense. The goal was impossible. They would need a telescope as big as the earth itself. The technology simply didn’t exist. And yet, a multi-national team of scientists was able to show the world an image of something previously unseeable. Based off extensive research and hours interviews with many of the team's ground-breaking scientist, physicists, and mathematicians, Black Hole Chasers is a story of unique technological innovation and scientific breakthroughs, but more importantly, it's a story of human curiosity and triumph.

Black Holes: A Laboratory for Testing Strong Gravity

Cosimo Bambi
Black Holes A Laboratory for Testing Strong Gravity Book PDF

Author : Cosimo Bambi
Publisher : Springer
Page : 340 pages
File Size : 42,9 Mb
Release : 2017-06-01
Category : Science
ISBN : 9789811045240

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Black Holes: A Laboratory for Testing Strong Gravity by Cosimo Bambi Pdf

This textbook introduces the current astrophysical observations of black holes, and discusses the leading techniques to study the strong gravity region around these objects with electromagnetic radiation. More importantly, it provides the basic tools for writing an astrophysical code and testing the Kerr paradigm. Astrophysical black holes are an ideal laboratory for testing strong gravity. According to general relativity, the spacetime geometry around these objects should be well described by the Kerr solution. The electromagnetic radiation emitted by the gas in the inner part of the accretion disk can probe the metric of the strong gravity region and test the Kerr black hole hypothesis. With exercises and examples in each chapter, as well as calculations and analytical details in the appendix, the book is especially useful to the beginners or graduate students who are familiar with general relativity while they do not have any background in astronomy or astrophysics.“/p>

The Rise and Fall of the Black Hole Paradigm

Abhas Mitra
The Rise and Fall of the Black Hole Paradigm Book PDF

Author : Abhas Mitra
Publisher : Pan Macmillan
Page : 230 pages
File Size : 47,9 Mb
Release : 2021-01-22
Category : Science
ISBN : 9789389104158

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The Rise and Fall of the Black Hole Paradigm by Abhas Mitra Pdf

Black holes have turned out to be the cornerstone of both physics and popular belief. But what if we were to realize that exact black holes cannot exist, even though their existence is apparently suggested by exact general relativistic solutions, and Roger Penrose won the 2020 Nobel Prize in Physics ‘for the discovery that black hole formation is a robust prediction of the general theory of relativity’? While it might seem far-fetched to claim so, it will be worth remembering that the finest theoretical physicists like Albert Einstein and Paul Dirac did not believe in black holes, and Stephen Hawking finally thought that there are no exact black holes. While the black hole paradigm has become commonplace in popular consciousness, in the last decade, noise has consistently grown about the many physical effects which can inhibit the formation of exact mathematical black holes. In The Rise and Fall of the Black Hole Paradigm, Abhas Mitra shows us how, much before these developments, he had proven why the so-called black holes must only be black hole pretenders. He identified these black hole candidates to be Magnetospheric Eternally Collapsing Objects (MECOs) and, along with Darryl J. Leiter and Stanley L. Robertson, generalized them. Recent evidence for the existence of strong magnetic fields around so-called black holes may provide confirmations of his claim.

Black Hole Survival Guide

Janna Levin
Black Hole Survival Guide Book PDF

Author : Janna Levin
Publisher : Anchor
Page : 161 pages
File Size : 44,7 Mb
Release : 2022-03-15
Category : Science
ISBN : 9781984899798

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Black Hole Survival Guide by Janna Levin Pdf

From the acclaimed author of Black Hole Blues and Other Songs from Outer Space—an authoritative and accessible guide to the most alluring and challenging phenomena of contemporary science. "[Levin will] take you on a safe black hole trip, an exciting travel story enjoyed from your chair’s event horizon.” —Boston Globe Through her writing, astrophysicist Janna Levin has focused on making the science she studies not just comprehensible but also, and perhaps more important, intriguing to the nonscientist. In this book, she helps us to understand and find delight in the black hole—perhaps the most opaque theoretical construct ever imagined by physicists—illustrated with original artwork by American painter and photographer Lia Halloran. Levin takes us on an evocative exploration of black holes, provoking us to imagine the visceral experience of a black hole encounter. She reveals the influence of black holes as they populate the universe, sculpt galaxies, and even infuse the whole expanse of reality that we inhabit. Lively, engaging, and utterly unique, Black Hole Survival Guide is not just informative—it is, as well, a wonderful read from first to last.

Soul Federation

Toshio Suzuki
Soul Federation Book PDF

Author : Toshio Suzuki
Publisher : Xlibris Corporation
Page : 408 pages
File Size : 42,9 Mb
Release : 2010-04-30
Category : Science
ISBN : 9781450026666

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Soul Federation by Toshio Suzuki Pdf

The basic topic of this book is to advocate the establishment of a world federation and world government and to consider the philosophy on how we can be happy. As for the establishment of a world federation and world government, the benefits of a world federation and world government are introduced. As for the philosophy on how we can be happy, some religious thoughts are introduced. For example, an idea which improves Einsteins theory of relativity is introduced. The Basic philosophy is that we must do good if we want to be happy. Our mission from God is to make a world where all people can live happily. These thoughts lead to the establishment of world federation and world government.