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Books > Science & Mathematics > Astronomy, space & time

Greek Astronomy (Paperback): Thomas L Heath Greek Astronomy (Paperback)
Thomas L Heath
R905 Discovery Miles 9 050 Ships in 12 - 17 working days

From its beginnings in Babylonian and Egyptian theories, through its flowering into revolutionary ideas such as heliocentricity, astronomy proved a source of constant fascination for the philosophers of antiquity. In ancient Greece, the earliest written evidence of astronomical knowledge appeared in the poems of Homer and Hesiod. In the present work, first published in 1932, Sir Thomas Little Heath (1861-1940) collects some of the most notable essays and discussions of astronomical theory by Greek astronomers and mathematicians, presenting them in English translation for the modern reader. With chronological coverage, Heath's book features a thorough introduction, a doxography of what ancient authors said about the earliest theorists and longer excerpts exploring fundamental ideas. Among the pieces are extracts from Plato's Republic and Ptolemy's work on the impossibility of a moving Earth, alongside material from Aristotle, Euclid, Strabo, Plutarch and others.

History of the Royal Astronomical Society, 1820-1920 (Paperback): John Louis Emil Dreyer, H.H. Turner History of the Royal Astronomical Society, 1820-1920 (Paperback)
John Louis Emil Dreyer, H.H. Turner
R947 Discovery Miles 9 470 Ships in 12 - 17 working days

Founded as the Astronomical Society of London in 1820, this illustrious organisation received its royal charter in 1831. It has counted some of the world's greatest astronomers among its members, most notably its first president, Sir William Herschel, whose family archive forms part of its extensive library. Now based in Burlington House in Piccadilly, it continues to publish journals, award medals and prizes, and support education and outreach work. Following the society's centenary, this survey of its history appeared in 1923 and comprises contributions from leading astronomers of the early twentieth century. The extracts from primary sources include the diary entry of Sir John Herschel, son of William, recording the dinner at which the society's formation was discussed. The work also provides insights into how the society was able to take advantage of imperial expansion to collect observations and data from around the world, fuelling the Victorian pursuit of scientific knowledge.

Volcanism on Io - A Comparison with Earth (Paperback): Ashley Gerard Davies Volcanism on Io - A Comparison with Earth (Paperback)
Ashley Gerard Davies
R1,312 Discovery Miles 13 120 Ships in 12 - 17 working days

The most powerful volcanoes in the Solar System are not on Earth, but on Io, a tiny moon of Jupiter. Whilst Earth and Io are the only bodies in the Solar System to have active, high-temperature volcanoes, those found on Io are larger, hotter, and more violent. This, the first book dedicated to volcanism on Io, contains the latest results from Galileo mission data analysis. As well as investigating the different styles and scales of volcanic activity on Io, it compares these volcanoes to their contemporaries on Earth. The book also provides a background to how volcanoes form and how they erupt, and explains quantitatively how remote-sensing data from spacecraft and telescopes are analysed to reveal the underlying volcanic processes. This richly illustrated book will be a fascinating reference for advanced undergraduates, graduate students and researchers in planetary sciences, volcanology, remote sensing and geology.

John Couch Adams and the Discovery of Neptune (Paperback): Harold Spencer Jones John Couch Adams and the Discovery of Neptune (Paperback)
Harold Spencer Jones
R360 Discovery Miles 3 600 Ships in 12 - 17 working days

Originally published in 1947, this book presents a concise account of the role of John Couch Adams (1819 92) in the discovery of Neptune. Excerpts from Adams' letters are incorporated throughout the text. This book will be of value to anyone with an interest in astronomy and the history of science."

An Introduction to Optical Stellar Interferometry (Paperback): A. Labeyrie, S.G. Lipson, P. Nisenson An Introduction to Optical Stellar Interferometry (Paperback)
A. Labeyrie, S.G. Lipson, P. Nisenson
R1,674 Discovery Miles 16 740 Ships in 12 - 17 working days

During the last two decades, optical stellar interferometry has become an important tool in astronomical investigations requiring spatial resolution well beyond that of traditional telescopes. This book, first published in 2006, was the first to be written on the subject. The authors provide an extended introduction discussing basic physical and atmospheric optics, which establishes the framework necessary to present the ideas and practice of interferometry as applied to the astronomical scene. They follow with an overview of historical, operational and planned interferometric observatories, and a selection of important astrophysical discoveries made with them. Finally, they present some as-yet untested ideas for instruments both on the ground and in space which may allow us to image details of planetary systems beyond our own.

Nearest Star - The Surprising Science of our Sun (Hardcover, 2nd Revised edition): Leon Golub, Jay M. Pasachoff Nearest Star - The Surprising Science of our Sun (Hardcover, 2nd Revised edition)
Leon Golub, Jay M. Pasachoff
R2,444 Discovery Miles 24 440 Ships in 12 - 17 working days

Description: How did the Sun evolve, and what will it become? What is the origin of its light and heat? How does solar activity affect the atmospheric conditions that make life on Earth possible? These are the questions at the heart of solar physics, and at the core of this book. The Sun is the only star near enough to study in sufficient detail to provide rigorous tests of our theories and help us understand the more distant and exotic objects throughout the cosmos. Having observed the Sun using both ground-based and spaceborne instruments, the authors bring their extensive personal experience to this story revealing what we have discovered about phenomena from eclipses to neutrinos, space weather, and global warming. This second edition is updated throughout, and features results from the current spacecraft that are aloft, especially NASA's Solar Dynamics Observatory, for which one of the authors designed some of the telescopes.

Protoplanetary Dust - Astrophysical and Cosmochemical Perspectives (Paperback): Daniel Apai, Dante S. Lauretta Protoplanetary Dust - Astrophysical and Cosmochemical Perspectives (Paperback)
Daniel Apai, Dante S. Lauretta
R1,656 Discovery Miles 16 560 Ships in 12 - 17 working days

Planet formation studies uniquely benefit from three disciplines: astronomical observations of extrasolar planet-forming disks, analysis of material from the early Solar System, and laboratory astrophysics experiments. Pre-planetary solids, fine dust, and chondritic components are central elements linking these studies. This book is the first comprehensive overview of planet formation, in which astronomers, cosmochemists, and laboratory astrophysicists jointly discuss the latest insights from the Spitzer and Hubble space telescopes, new interferometers, space missions including Stardust and Deep Impact, and laboratory techniques. Following the evolution of solids from their genesis through protoplanetary disks to rocky planets, the book discusses in detail how the latest results from these disciplines fit into a coherent picture. This volume provides a clear introduction and valuable reference for students and researchers in astronomy, cosmochemistry, laboratory astrophysics, and planetary sciences.

Bayesian Methods in Cosmology (Paperback): Michael P. Hobson, Andrew H. Jaffe, Andrew R. Liddle, Pia Mukherjee, David Parkinson Bayesian Methods in Cosmology (Paperback)
Michael P. Hobson, Andrew H. Jaffe, Andrew R. Liddle, Pia Mukherjee, David Parkinson
R1,320 Discovery Miles 13 200 Ships in 12 - 17 working days

In recent years cosmologists have advanced from largely qualitative models of the Universe to precision modelling using Bayesian methods, in order to determine the properties of the Universe to high accuracy. This timely book is the only comprehensive introduction to the use of Bayesian methods in cosmological studies, and is an essential reference for graduate students and researchers in cosmology, astrophysics and applied statistics. The first part of the book focuses on methodology, setting the basic foundations and giving a detailed description of techniques. It covers topics including the estimation of parameters, Bayesian model comparison, and separation of signals. The second part explores a diverse range of applications, from the detection of astronomical sources (including through gravitational waves), to cosmic microwave background analysis and the quantification and classification of galaxy properties. Contributions from 24 highly regarded cosmologists and statisticians make this an authoritative guide to the subject.

Dark Energy - Observational and Theoretical Approaches (Paperback): Pilar Ruiz-Lapuente Dark Energy - Observational and Theoretical Approaches (Paperback)
Pilar Ruiz-Lapuente
R1,497 Discovery Miles 14 970 Ships in 12 - 17 working days

'Dark energy' is the name given to the unknown cause of the Universe's accelerating expansion, which is one of the most significant and surprising discoveries in recent cosmology. Understanding this enigmatic ingredient of the Universe and its gravitational effects is a very active, and growing, field of research. In this volume, twelve world-leading authorities on the subject present the basic theoretical models that could explain dark energy, and the observational and experimental techniques employed to measure it. Covering the topic from its origin, through recent developments, to its future perspectives, this book provides a complete and comprehensive introduction to dark energy for a range of readers. It is ideal for physics graduate students who have just entered the field and researchers seeking an authoritative reference on the topic.

The Dark Matter Problem - A Historical Perspective (Paperback): Robert H. Sanders The Dark Matter Problem - A Historical Perspective (Paperback)
Robert H. Sanders
R872 Discovery Miles 8 720 Ships in 12 - 17 working days

Most astronomers and physicists now believe that the matter content of the Universe is dominated by dark matter: hypothetical particles which interact with normal matter primarily through the force of gravity. Though invisible to current direct detection methods, dark matter can explain a variety of astronomical observations. This book describes how this theory has developed over the past 75 years, and why it is now a central feature of extragalactic astronomy and cosmology. Current attempts to directly detect dark matter locally are discussed, together with the implications for particle physics. The author comments on the sociology of these developments, demonstrating how and why scientists work and interact. Modified Newtonian Dynamics (MOND), the leading alternative to this theory, is also presented. This fascinating overview will interest cosmologists, astronomers and particle physicists. Mathematics is kept to a minimum, so the book can be understood by non-specialists.

My Book of Stars and Planets - A fact-filled guide to space (Hardcover): Parshati Patel My Book of Stars and Planets - A fact-filled guide to space (Hardcover)
Parshati Patel
bundle available
R337 R282 Discovery Miles 2 820 Save R55 (16%) Ships in 9 - 15 working days

Discover the mysteries of the Universe and journey to galaxies beyond our own in this fact-packed companion to space. From icy worlds and hot, fiery giants to the biggest telescopes and latest spacecraft, this book covers more than 40 profiles of the planets, stars, and objects in our universe. Find out all about our neighboring planets, from tiny Mercury to gigantic Jupiter. Discover what lies beyond our solar system and the stars we can see in the night sky. Learn about the latest space technology and when humans may finally land on Mars. Broken down by type, each object is presented in a clear, engaging way, with stunning images and bite-sized chunks of information. Detailed NASA photography brings the mysteries of outer space to life, while pronunciation guides help with tricky names, and a visual index gives a quick overview of all the key objects in the book. Filled with fascinating details for every young stargazer and budding astronaut, My Book of Stars and Planets is the perfect first reference book on space and the universe for kids.

Popular Astronomy - A General Description of the Heavens (Paperback): Camille Flammarion Popular Astronomy - A General Description of the Heavens (Paperback)
Camille Flammarion; Translated by John Ellard Gore
R1,841 Discovery Miles 18 410 Ships in 12 - 17 working days

French astronomer Camille Flammarion (1842-1925) called the study of the heavens 'the science which concerns us most'. He believed that learning 'what place we occupy in the infinite' could delight and instruct, and might even promote an end to war and strife. Flammarion dedicated the present work to Francois Arago (1786-1853), author of earlier work on popular astronomy. Since Arago's time, the capabilities of telescopes and other instruments had vastly improved, advancing understanding in areas such as the composition of stars. Flammarion sought to bring this new knowledge to the public in a charming yet 'scrupulously exact' style. His highly illustrated introduction to astronomy succeeded in reaching a wide readership, selling over 100,000 French copies before this English translation appeared in 1894. The 1881 French version and Flammarion's work on the origins of the Earth, Le Monde avant la creation de l'homme (1886), are also reissued in this series.

Tycho Brahe - A Picture of Scientific Life and Work in the Sixteenth Century (Paperback): John Louis Emil Dreyer Tycho Brahe - A Picture of Scientific Life and Work in the Sixteenth Century (Paperback)
John Louis Emil Dreyer
R1,256 Discovery Miles 12 560 Ships in 12 - 17 working days

Famous for his metal prosthetic nose, and for being associated with 'unlucky' days in Scandinavian folklore, Tycho Brahe (1546 1601) made the most accurate naked-eye astronomical measurements of his day. Cataloguing more than 1,000 new stars, his stellar and planetary observations helped lay the foundations of early modern astronomy. John Louis Emil Dreyer (1852 1926) was a fellow Dane, but he spent much of his working life in Ireland. When he was fourteen, he had read a book about Brahe and this inspired him to 'be an astronomer and nothing else'. First published in 1890, Dreyer's biography of his hero remained the definitive work for more than a century. He sets out to illuminate not simply the life of his subject, but also the lives and work of Brahe's contemporaries and the progress of science in the sixteenth century."

An Account of Experiments to Determine the Figure of the Earth by Means of the Pendulum Vibrating Seconds in Different... An Account of Experiments to Determine the Figure of the Earth by Means of the Pendulum Vibrating Seconds in Different Latitudes - As Well As on Various Other Subjects of Philosophical Inquiry (Paperback)
Edward Sabine
R1,771 Discovery Miles 17 710 Ships in 12 - 17 working days

As early as the seventeenth century, scientists realised that a pendulum swings more slowly at the equator than it would at the North Pole. Newton predicted that gravity increased with latitude, and that the Earth could not be perfectly spherical. Although various experiments were undertaken to determine the exact degree of this ellipticity, none proved successful until physicist Edward Sabine (1788-1883) embarked on a series of expeditions across the world. Based on pendulum measurements from a wide range of latitudes, from Jamaica to Spitsbergen, his results were very different to mathematical predictions, and far more accurate; Charles Babbage would even complain that they were too good to be true. In this account, which first appeared in 1825, Sabine explains his methodology and presents his findings. His book opens a fascinating window into nineteenth-century geodesy for students in the history of science.

A Far-Infrared Spectro-Spatial Space Interferometer - Instrument Simulator and Testbed Implementation (Hardcover, 1st ed.... A Far-Infrared Spectro-Spatial Space Interferometer - Instrument Simulator and Testbed Implementation (Hardcover, 1st ed. 2016)
Roser Juanola-Parramon
R3,678 Discovery Miles 36 780 Ships in 10 - 15 working days

This thesis describes the physics and computational aspects of an end-to-end simulator to predict the performance of a Space-based Far Infrared Interferometer. The present thesis also includes, the science capabilities and instrumental state-of-the art. The latter is the ambitious next step which the Far-Infrared Astrophysical community needs to take to improve in anyway on the results of the most recent and current space telescopes in this wavelength region. This thesis outlines the requirements involved in such a mission and describes the most promising technique to capture most of the astrophysical information by combining spectroscopy to spatial interferometer. The simulation of such a system is extremely complex requiring multiple Fourier transforms each of which is subject to instrument non-idealities and appropriate optimization techniques. As a conclusion, the thesis provides an example of the basic performance achievable with such an instrument when targeting a young star formation region.

Memoir of John Michell (Paperback): Archibald Geikie Memoir of John Michell (Paperback)
Archibald Geikie
R769 Discovery Miles 7 690 Ships in 12 - 17 working days

John Michell (1724-93) was a renowned English natural philosopher, astronomer and geologist. Originally published in 1918, this book presents a concise study of Michell's life and achievements, incorporating discussion of his contributions to geology, physics and astronomy. The text was written by Scottish geologist Archibald Geikie (1835-1924), following researches among the archives of the Royal Society and its dining club. This is a highly readable book that will be of value to anyone with an interest in Michell and his scientific achievements.

Direction-Space! (Hardcover): Maria Gruzdeva Direction-Space! (Hardcover)
Maria Gruzdeva
R966 R852 Discovery Miles 8 520 Save R114 (12%) Ships in 12 - 17 working days

Cosmonauts have lived and trained in Star City since the 1960s. In the Soviet era, it was one of the most top secret locations in the Soviet Union. Also known as The Yuri Gagarin Russian State Science Research Cosmonauts Training Centre) it is still a military research facility and consists of a training facility and a residential area for the cosmonauts and their families as well as the military and civilian personnel serving the facility. Baikonur, situated in Kazakhstan, was the world's first space launch facility and it is still the largest. Nowadays, the site is rented and administered by Russia. Direction-Space! is a fascinating study of Star City and Baikonur. Incorporating unique archive materials, it explores the reality of the space community at first hand, investigating the physical and psychological space as well the routine and lives of its residents. It offers a new insight into a subject central to the Cold War history of the Soviet Union and raises questions over attitudes and perceptions that have been formed over the years.

The Universe of Digital Sky Surveys - A Meeting to Honour the 70th Birthday of Massimo Capaccioli (Hardcover, 1st ed. 2016):... The Universe of Digital Sky Surveys - A Meeting to Honour the 70th Birthday of Massimo Capaccioli (Hardcover, 1st ed. 2016)
Nicola R Napolitano, Giuseppe Longo, Marcella Marconi, Maurizio Paolillo, Enrichetta Iodice
R5,681 Discovery Miles 56 810 Ships in 10 - 15 working days

These are the proceedings of a meeting in honour of Massimo Capaccioli at the occasion of his 70th birthday. The conference aimed at summarizing the results from the main current and past digital sky survey projects and at discussing how these can be used to inspire ongoing projects and better plan the future ones. Over the last decades, digital sky surveys performed with dedicated telescopes and finely-tuned wide-field cameras, have revolutionized astronomy. They have become the main tool to investigate the nearby and far away universe, thus providing new insights in the understanding of the galaxy structure and assembly across time, the dark components of the universe, as well as the history of our own galaxy. They have also opened the time domain leading to a new understanding of the transient phenomena in the universe. By providing public access to top quality data, digital surveys have also changed the everyday practice of astronomers who have become less dependent on direct access to large observing facilities. The full scientific exploitation of these surveys has also triggered significant advances in both space and ground based technology and in the field of multi-object spectroscopy. The various sections of this book are devoted to different relevant aspects of astrophysics in the era of digital sky surveys and include both review and shorter, more focused contributions.

Light Scattering Reviews, Volume 11 - Light Scattering and Radiative Transfer (Hardcover, 1st ed. 2016): Alexander Kokhanovsky Light Scattering Reviews, Volume 11 - Light Scattering and Radiative Transfer (Hardcover, 1st ed. 2016)
Alexander Kokhanovsky
R6,332 Discovery Miles 63 320 Ships in 10 - 15 working days

This is the eleventh volume in the series Light Scattering Reviews, devoted to current knowledge of light scattering problems and both experimental and theoretical research techniques related to their solution. The focus of this volume is to describe modern advances in radiative transfer and light scattering optics. This book brings together the most recent studies on light radiative transfer in the terrestrial atmosphere, while also reviewing environmental polarimetry. The book is divided into nine chapters: * the first four chapters review recent advances in modern radiative transfer theory and provide detailed descriptions of radiative transfer codes (e.g., DISORT and CRTM). Approximate solutions of integro-differential radiative transfer equations for turbid media with different shapes (spheres, cylinders, planeparallel layers) are detailed; * chapters 5 to 8 focus on studies of light scattering by single particles and radially inhomogeneous media; * the final chapter discusses the environmental polarimetry of man-made objects.

The Caloris Network - A Scientific Novel (Paperback, 1st ed. 2016): Nick Kanas The Caloris Network - A Scientific Novel (Paperback, 1st ed. 2016)
Nick Kanas
R921 R849 Discovery Miles 8 490 Save R72 (8%) Ships in 10 - 15 working days

The year is 2130. The first-ever expedition is sent to Mercury to search for the cause of an unknown source of electromagnetic radiation that can destroy space ships passing by the planet. Thought to be inhospitable and lifeless, the surface of Mercury provides startling surprises for the crew that endanger their lives and challenge their established notions of what it means to be a sentient being. And some of the crew members have their own separate agendas ...The scientific appendix at the end of the book introduces readers to the wondrous world of Mercury and how it has been portrayed in literary fiction up to the present time. The author then uses scientific literature to present a concept of life that is not based on carbon chemistry or the need for water. There is also a discussion of consciousness based on electromagnetic wave theory. References are provided for further reading.Nick Kanas is an Emeritus Professor of Psychiatry at the University of California, San Francisco, where he directed the group therapy training program. For over 20 years he conducted research on group therapy, and for nearly 20 years after that he was the Principal Investigator of NASA-funded research on astronauts and cosmonauts. He is the co-author of Space Psychology and Psychiatry, which won the 2004 International Academy of Astronautics Life Science Book Award, and the author of Humans in Space: The Psychological Hurdles, which won the 2016 International Academy of Astronautics Life Science Book Award. Dr. Kanas has presented talks on space psychology and on celestial mapping at several regional and Worldcon science fiction conventions. A Fellow of the Royal Astronomical Society (London), he has been an amateur astronomer for over 50 years and is an avid reader of science fiction. He is also the author of two non-fiction books (Star Maps: History, Artistry, and Cartography and Solar System Maps: From Antiquity to the Space Age) and two science fiction novels (The New Martians and The Protos Mandate), all published by Springer.

The Cosmic Microwave Background - From Quantum Fluctuations to the Present Universe (Paperback): Jose Alberto Rubino-Martin,... The Cosmic Microwave Background - From Quantum Fluctuations to the Present Universe (Paperback)
Jose Alberto Rubino-Martin, Rafael Rebolo, Evencio Mediavilla
R1,160 Discovery Miles 11 600 Ships in 12 - 17 working days

This volume presents the lectures of the nineteenth Canary Islands Winter School, dedicated to the Cosmic Microwave Background (CMB). This relict radiation from the very early Universe provides a fundamental tool for precision cosmology. Prestigious researchers in the field present a comprehensive overview of current knowledge of the CMB, reviewing the theoretical foundations, the main observational results and the most advanced statistical techniques used in this discipline. The lectures give coverage from the basic principles to the most recent research results, reviewing state of the art observational and statistical analysis techniques. The impact of new experiments and the constraints imposed on cosmological parameters are emphasized and put into the broader context of research in cosmology. This is an important resource for both graduate students and experienced researchers, revealing the spectacular progress that has been made in the study of the CMB within the last decade.

Patrick Moore's Data Book of Astronomy (Paperback, 2nd Revised edition): Patrick Moore, Robin Rees Patrick Moore's Data Book of Astronomy (Paperback, 2nd Revised edition)
Patrick Moore, Robin Rees
R1,635 Discovery Miles 16 350 Ships in 12 - 17 working days

Packed with up-to-date astronomical data about the Solar System, our Galaxy and the wider Universe, this is a one-stop reference for astronomers of all levels. It gives the names, positions, sizes and other key facts of all the planets and their satellites; discusses the Sun in depth, from sunspots to solar eclipses; lists the dates for cometary returns, close-approach asteroids, and significant meteor showers; and includes 88 star charts, with the names, positions, magnitudes and spectra of the stars, along with key data on nebulae and clusters. Full of facts and figures, this is the only book you need to look up data about astronomy. It is destined to become the standard reference for everyone interested in astronomy.

The Three-body Problem from Pythagoras to Hawking (Paperback, 1st ed. 2016): Mauri Valtonen, Joanna Anosova, Konstantin... The Three-body Problem from Pythagoras to Hawking (Paperback, 1st ed. 2016)
Mauri Valtonen, Joanna Anosova, Konstantin Kholshevnikov, Aleksandr Myllari, Victor Orlov, …
R1,802 R1,531 Discovery Miles 15 310 Save R271 (15%) Ships in 10 - 15 working days

This book, written for a general readership, reviews and explains the three-body problem in historical context reaching to latest developments in computational physics and gravitation theory. The three-body problem is one of the oldest problems in science and it is most relevant even in today's physics and astronomy. The long history of the problem from Pythagoras to Hawking parallels the evolution of ideas about our physical universe, with a particular emphasis on understanding gravity and how it operates between astronomical bodies. The oldest astronomical three-body problem is the question how and when the moon and the sun line up with the earth to produce eclipses. Once the universal gravitation was discovered by Newton, it became immediately a problem to understand why these three-bodies form a stable system, in spite of the pull exerted from one to the other. In fact, it was a big question whether this system is stable at all in the long run. Leading mathematicians attacked this problem over more than two centuries without arriving at a definite answer. The introduction of computers in the last half-a-century has revolutionized the study; now many answers have been found while new questions about the three-body problem have sprung up. One of the most recent developments has been in the treatment of the problem in Einstein's General Relativity, the new theory of gravitation which is an improvement on Newton's theory. Now it is possible to solve the problem for three black holes and to test one of the most fundamental theorems of black hole physics, the no-hair theorem, due to Hawking and his co-workers.

The Shadow of Black Holes - An Analytic Description (Paperback, 1st ed. 2016): Arne Grenzebach The Shadow of Black Holes - An Analytic Description (Paperback, 1st ed. 2016)
Arne Grenzebach
R1,848 Discovery Miles 18 480 Ships in 10 - 15 working days

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 Plebanski-Demianski 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.

Gravitation, Inertia and Weightlessness - Centrifugal and Gyroscopic Effects of the n-Body System's Interaction Energy... Gravitation, Inertia and Weightlessness - Centrifugal and Gyroscopic Effects of the n-Body System's Interaction Energy (Hardcover, 1st ed. 2016)
V.I. Ferronsky
R4,116 Discovery Miles 41 160 Ships in 10 - 15 working days

This work discusses the problem of physical meaning of the three main dynamical properties of matter motion, namely gravitation, inertia and weightlessness. It considers that Newtonian gravitation and Galileo's inertia are the centrifugal effects of interaction energy of a self-gravitating n-body system and its potential field. A self-gravitating celestial body appears to be an excellent natural centrifuge that is rotated by the energy of interacting elementary particles. Weightlessness is a consequence of the centrifugal effect of elementary particles interaction that appears at differentiation of a body matter with respect to density. The author analyzes the problem of creation of mass particles and elements from the elementary particles of "dark matter", and discusses the basic physics of the Jacobi dynamics from the viewpoint of quantum gravitation. Chapters assert that the fundamentals of Jacobi dynamics completely correspond to conditions of natural centrifuges. The centrifuge is an excellent experimental model for the study of dynamical effects in solving the many body problem. In this book, readers may follow the demonstration of some of those studies and follow derivations, solutions and conclusions that provide a solid basis for further research in celestial mechanics, geophysics, astrophysics, geo- and planetary sciences.

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