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Books > Science & Mathematics > Astronomy, space & time

The Early Evolution of the Atmospheres of Terrestrial Planets (Hardcover, 2013 ed.): J.M. Trigo-Rodriguez, Francois Raulin,... The Early Evolution of the Atmospheres of Terrestrial Planets (Hardcover, 2013 ed.)
J.M. Trigo-Rodriguez, Francois Raulin, Christian Muller, Conor Nixon
R4,671 Discovery Miles 46 710 Ships in 12 - 17 working days

"The Early Evolution of the Atmospheres of Terrestrial Planets" presents the main processes participating in the atmospheric evolution of terrestrial planets. A group of experts in the different fields provide an update of our current knowledge on this topic. Several papers in this book discuss the key role of nitrogen in the atmospheric evolution of terrestrial planets. The earliest setting and evolution of planetary atmospheres of terrestrial planets is directly associated with accretion, chemical differentiation, outgassing, stochastic impacts, and extremely high energy fluxes from their host stars. This book provides an overview of the present knowledge of the initial atmospheric composition of the terrestrial planets. Additionally it includes some papers about the current exoplanet discoveries and provides additional clues to our understanding of Earth's transition from a hot accretionary phase into a habitable world. All papers included were reviewed by experts in their respective fields. We are living in an epoch of important exoplanet discoveries, but current properties of these exoplanets do not match our scientific predictions using standard terrestrial planet models. This book deals with the main physio-chemical signatures and processes that could be useful to better understand the formation of rocky planets.

When the Earth Was Flat - Studies in Ancient Greek and Chinese Cosmology (Hardcover, 1st ed. 2018): Dirk L. Couprie When the Earth Was Flat - Studies in Ancient Greek and Chinese Cosmology (Hardcover, 1st ed. 2018)
Dirk L. Couprie
R5,078 Discovery Miles 50 780 Ships in 12 - 17 working days

This book is a sequel to Heaven and Earth in Ancient Greek Cosmology (Springer 2011). With the help of many pictures, the reader is introduced into the way of thinking of ancient believers in a flat earth. The first part offers new interpretations of several Presocratic cosmologists and a critical discussion of Aristotle's proofs that the earth is spherical. The second part explains and discusses the ancient Chinese system called gai tian. The last chapter shows that, inadvertently, ancient arguments and ideas return in the curious modern flat earth cosmologies.

Dictionary of Minor Planet Names - Addendum to 6th Edition: 2012-2014 (Hardcover, Addendum to 6th Edition): Lutz D. Schmadel Dictionary of Minor Planet Names - Addendum to 6th Edition: 2012-2014 (Hardcover, Addendum to 6th Edition)
Lutz D. Schmadel
R3,988 R3,721 Discovery Miles 37 210 Save R267 (7%) Ships in 12 - 17 working days

The quantity of numbered minor planets is now approaching half a million. Together with this Addendum, the sixth edition of the Dictionary of Minor Planet Names, which is the IAU's official reference for the field, now covers more than 19,000 named minor planets. In addition to being of practical value for identification purposes, the Dictionary of Minor Planet Names provides authoritative information about the basis for the rich and colorful variety of ingenious names, from heavenly goddesses to artists, from scientists to Nobel laureates, from historical or political figures to ordinary women and men, from mountains to buildings, as well as a variety of compound terms and curiosities. This Addendum to the 6th edition of the Dictionary of Minor Planet Names adds approximately 2200 entries. It also contains many corrections, revisions and updates to the entries published in earlier editions. This work is an abundant source of information for anyone interested in minor planets and who enjoys reading about the people and things minor planets commemorate.

Cosmic Rays, Supernovae and the Interstellar Medium - International Proceedings (Hardcover): Maurice M. Shapiro, Rein... Cosmic Rays, Supernovae and the Interstellar Medium - International Proceedings (Hardcover)
Maurice M. Shapiro, Rein Silberberg, John P. Wefel
R2,504 Discovery Miles 25 040 Ships in 12 - 17 working days

I. Cosmic Rays and the Interstellar Medium.- A Brief Introduction to the Cosmic Radiation.- The Composition of the Cosmic Rays: An Update.- Interstellar Dust-Gas Relationships.- Dust, Gas and Cosmic Rays in the Interstellar Medium.- Comparison Between Greenberg and Mathis Models of Grains for the H2 Formation Induced by Cosmic Rays.- II. Supernovae, Acceleration, Propagation and Source Composition.- Shock Acceleration of Cosmic Rays.- Source Composition, Sites of Origin And Acceleration of Cosmic Rays.- Cosmic-Ray Age and the Interstellar Medium.- The Production of Antiprotons in the Interstellar Gas by Propagating Cosmic Rays.- The Source Composition of Galactic Cosmic Rays and the Condensation Process of the Elements in Circumstellar and Interstellar Gases.- The Distribution of Supernova Remnants in the Galaxy.- Gamma Rays from Supernova 1987A.- Acceleration of Cosmic Rays at Young Supernova Remnants.- The Effect of Relativistic Particle Beams on the Evolution of Supernova Envelopes: Self-Consistent Solutions.- Radio Spectral Variations in the Cygnus Loop.- III. Gamma Rays and Their Role as Cosmic Ray Tracers.- Gamma Ray Astrophysics at Energies up to 10 Gev.- Vhe and UHE Gamma Ray Sources.- Gamma-Rays from Electron, Proton Beam Interactions with Matter and/or Radiation: Application to Cygx-L, Geminga, and 3C273.- Gamma Rays and Neutrinos from Accretion Processes onto Collapsed Objects: Application to 3C273.- Nearby Galaxies in Highenergy Gamma Rays.- IV. Ultra-Energetic Cosmic Nuclei.- Cosmic Rays at the Highest Energies.- Participants.- Author Index.

Planetary Cartography and GIS (Hardcover, 1st ed. 2019): Henrik Hargitai Planetary Cartography and GIS (Hardcover, 1st ed. 2019)
Henrik Hargitai
R5,076 Discovery Miles 50 760 Ships in 12 - 17 working days

This book approaches geological, geomorphological and topographical mapping from the point in the workflow at which science-ready datasets are available. Though there have been many individual projects on dynamic maps and online GISs, in which coding and data processing are given precedence over cartographic principles, cartography is more than "just" processing and displaying spatial data. However, there are currently no textbooks on this rapidly changing field, and methods tend to be shared informally. Addressing this gap in the literature, the respective chapters outline many topics pertaining to cartography and mapping such as the role and definition of planetary cartography and (vs?) Geographic Information Science; theoretical background and practical methodologies in geological mapping; science-ready versus public-ready products; a goal/procedure-focused practical manual of the most commonly used software in planetary mapping, which includes generic (ArcGIS and its extensions, JMARS) and specific tools (HiView, Cratertools etc.); extracting topographic information from images; thematic mapping: climate; geophysics; surface modeling; change detection; landing site selection; shared maps; dynamic maps on the web; planetary GIS interfaces; crowdsourcing; crater counting techniques; irregular bodies; geological unit symbology; mapping center activities; and web services. All chapters were prepared by authors who have actually produced geological maps or GISs for NASA / the USGS, DLR, ESA or MIIGAIK. Taken together, they offer an excellent resource for all planetary scientists whose research depends on mapping, and for students of astrogeology.

Astronomy (Hardcover): Andrew Fraknoi, David Morrison, Sidney C. Wolff Astronomy (Hardcover)
Andrew Fraknoi, David Morrison, Sidney C. Wolff
R2,578 Discovery Miles 25 780 Ships in 12 - 17 working days
A History of Modern Planetary Physics - Nebulous Earth (Hardcover): Stephen G Brush A History of Modern Planetary Physics - Nebulous Earth (Hardcover)
Stephen G Brush
R2,499 Discovery Miles 24 990 Ships in 12 - 17 working days

Where did we come from? Before there was life there had to be something to live on - a planet, a solar system. During the past 200 years, astronomers and geologists have developed and tested several different theories about the origin of the solar system and the nature of the Earth. Did the Earth and other planets form as a by-product of a natural process that formed the Sun? Did the solar system come into being as the result of catastrophic encounter of two stars? Is the inside of the Earth solid, liquid or gaseous? The three volumes that make up A History of Modern Planetary Physics present a survey of these theories. Nebulous Earth follows the development of the nineteenth-century's most popular explanation for the origin of the solar system, Laplace's Nebular Hypothesis. This theory supposes that a flattened mass of gas extending beyond Neptune's orbit cooled and shrank, throwing off in the process successive rings that in time coalesced to form several planets.

The Realm of Interacting Binary Stars (Hardcover, 1992 ed.): J. Sahade, G.E. McCluskey, Y. Kondo The Realm of Interacting Binary Stars (Hardcover, 1992 ed.)
J. Sahade, G.E. McCluskey, Y. Kondo
R2,523 Discovery Miles 25 230 Ships in 12 - 17 working days

More than two centuries have elapsed since the story of interacting binary stars began with the rediscovery of the variability of Algol by John Goodricke and the interpretation he proposed for explaining the regular periodic brightness variations which he found. Over this long span of time our knowledge about these systems has been growing, and we have now reached a fairly good understanding of the structure and behaviour of this interesting group of objects. This book contains a timely summary of our present knowledge of interacting binary stars. The chapters have been written by distinguished scientists who have done relevant research in the field of interacting binary stars.

Stellar Disk Evolution and Gaseous Disk Turbulence of Dwarf Irregular Galaxies (Hardcover, 1st ed. 2016): Hong-Xin Zhang Stellar Disk Evolution and Gaseous Disk Turbulence of Dwarf Irregular Galaxies (Hardcover, 1st ed. 2016)
Hong-Xin Zhang
R3,349 Discovery Miles 33 490 Ships in 12 - 17 working days

This book focuses on the stellar disk evolution and gas disk turbulence of the most numerous galaxies in the local Universe - the dwarf galaxies. The "outside-in" disk shrinking mode was established for a relatively large sample of dwarf galaxies for the first time, and this is in contrast to the "inside-out" disk growth mode found for spiral galaxies. Double exponential brightness profiles also correspond to double exponential stellar mass profiles for dwarf galaxies, which is again different from most spiral galaxies. The cool gas distribution in dwarf galaxies was probed with the spatial power spectra of hydrogen iodide (HI) gas emission, and provided indirect evidence that inner disks of dwarf galaxies have proportionally more cool gas than outer disks. The finding that no correlation exists between gas power spectral indices and star formation gave important constraints on the relation between turbulence and star formation in dwarf galaxies.

The Great Refractor of Meudon Observatory (Hardcover, 2013 ed.): Audouin Dollfus The Great Refractor of Meudon Observatory (Hardcover, 2013 ed.)
Audouin Dollfus
R2,866 Discovery Miles 28 660 Ships in 10 - 15 working days

The large telescope at Meudon has become legendary. When it was conceived, after 1870, astronomy as a whole was limited to visual observation. Knowledge of the sky was limited to what one could see, assisted only by optical means. The large telescopes produced at this time produced larger images, permitting close-up views: the Meudon telescope was able to accomplish this perfectly. At Meudon, which became the Mecca of visual observation, the major planets were examined in a way that no other telescope had previously been able to. The telescope monitored the state of their atmospheres and mapped the appearance of their surfaces. Through the telescope, one could obtain photographs showing the nuclei of comets, revealing their very small size, and by using an eyepiece one could measure the separation of double stars. With a marvellous little instrument, the polarimeter, the nature of clouds in planetary atmospheres has been determined, and the type of surface material identified. Many more results were obtained, while photography, universally adopted, revolutionized other knowledge about the world. The sensitive emulsion, combined with large aperture reflecting telescopes, revealed the deepness and richness of the cosmos. The vast telescope of Meudon, which was the largest refracting telescope in Europe, became a legendary instrument and was symbolic of a new way to practice astronomy. Audouin Dollfus, a renowned astronomer, describes the great years of the Meudon telescope. He gives us the entire story of this instrument, from the birth of the concept that drove Jules Janssen at the end of the nineteenth century, to the idea that French astronomy could provide an outstanding telescope which would approach the limits of technical and industrial resources. The telescope remained unchanged until 2006, when the first steps toward restoration and public reopening were taken.

The Astronomer Jules Janssen - A Globetrotter of Celestial Physics (Hardcover, 2012): Francoise Launay The Astronomer Jules Janssen - A Globetrotter of Celestial Physics (Hardcover, 2012)
Francoise Launay
R2,891 Discovery Miles 28 910 Ships in 10 - 15 working days

A physicist and an inventor, Jules Janssen (1824-1907) devoted his life to astronomical research. He spent many years traveling around the world to observe total Solar eclipses, demonstrating that a new era of science had just come thanks to the use of both spectroscopy and photography, and persuading the French Government of the necessity of founding a new observatory near Paris. He became its director in 1875. There, at Meudon, he began routine photographic recordings of the Sun surface and had a big refractor and a big reflector built. Meanwhile, he also succeeded in building an Observatory at the summit of Mont-Blanc. The story of this untiring and stubborn globe-trotter is enriched by extracts of the unpublished correspondence with his wife. One can thus understand why Henriette often complained of the solitude in which she was left by her peripatetic husband: "There are men who leave their wives for mistresses; you do it for journeys!" ... Basking in the glow of his success, Janssen was able to undertake the construction of the great astrophysical observatory of which he had dreamed. It was at Meudon that he had it built.

Interdecadal Changes in Ocean Teleconnections with the Sahel - Implications in Rainfall Predictability (Hardcover, 1st ed.... Interdecadal Changes in Ocean Teleconnections with the Sahel - Implications in Rainfall Predictability (Hardcover, 1st ed. 2019)
Roberto Suarez Moreno
R2,880 Discovery Miles 28 800 Ships in 10 - 15 working days

In tropical latitudes, monsoons trigger regimes of strong seasonal rainfall over the continents. Over the West African region, the rainfall has shown a strong variability from interannual to decadal time scales. The atmospheric response to global sea surface temperatures is the leading cause of rainfall variability in the West African Sahel. This thesis explores changes in the leading ocean forcing of Sahelian rainfall interannual variability. It anaylzes the dynamical mechanisms at work to explain the non-stationary sea surface temperature-forced response of anomalous rainfall. The underlying multidecadal sea surface temperature background is raised as a key factor that favors some interannual teleconnections and inhibits others. Results of this thesis are relevant for improving the seasonal predictability of summer rainfall in the Sahel.

Tutorial Guide to X-ray and Gamma-ray Astronomy - Data Reduction and Analysis (Hardcover, 1st ed. 2020): Cosimo Bambi Tutorial Guide to X-ray and Gamma-ray Astronomy - Data Reduction and Analysis (Hardcover, 1st ed. 2020)
Cosimo Bambi
R4,078 Discovery Miles 40 780 Ships in 12 - 17 working days

This book provides a comprehensive introduction to X-ray and gamma-ray astronomy. The first part discusses the basic theoretical and observational topics related to black hole astrophysics; the optics and the detectors employed in X-ray and gamma-ray astronomy; and past, present, and future X-ray and gamma-ray missions. The second part then describes data reduction and analysis, the statistics used in X-ray and gamma-ray astronomy, and demonstrates how to write a successful proposal and a scientific paper. Data reduction in connection with specific X-ray and gamma-ray missions is covered in the appendices. Presenting the state of the art in X-ray and gamma-ray astronomy, this is both a valuable textbook for students and an important reference resource for researchers in the field.

The Square Kilometre Array: Paving the way  for the new 21st century radio astronomy paradigm - Proceedings of Symposium 7 of... The Square Kilometre Array: Paving the way for the new 21st century radio astronomy paradigm - Proceedings of Symposium 7 of JENAM 2010 (Hardcover, 2012)
Domingos Barbosa, Sonia Anton, Leonid Gurvits, Dalmiro Maia
R4,331 Discovery Miles 43 310 Ships in 10 - 15 working days

The Square Kilometre Array (SKA) will provide more than one order of magnitude improvement in sensitivity compared with any existing radio telescope over a wavelength range of several hundred to one, from decametric to microwave wavelengths. It will revolutionize the study of the most abundant element in the Universe, hydrogen, from the epoch of reionisation to the present-day, probing the onset formation period of the very first stars, will closely scan proto-planets and, through the precision timing of pulsars, will detect the distortions of space-time due to gravitational radiation. The SKA is a sensing network spanning 3000 km from its centre and with a collecting area of more than 1 square kilometre, using technologies of the 21st century. The SKA will make the study of a wide range of phenomena initially studied at other wavelengths possible at radio wavelengths, as well as opening a new discovery window on new phenomena at radio wavelengths.
Symposium 7 of the JENAM 2010 aimed at bringing these diverse opportunities to the attention of both theoretical and observational astronomers working at all wavelengths, including the potential for synergies with other facilities. The meeting highlighted the scientific potential of the SKA, discussed scientific priorities and their impact on the design of the SKA, explored the synergies between the SKA and other next-generation astronomical facilities in different wavelength domains such as the ALMA, ELTs, LSST, JWST, GRE, IXO, Gaia and Euclid, and high-energy facilities (Auger), explored the "cyber-infrastructure" that may become available for the distribution and distributed analysis of SKA data."

Copernicus and his Successors (Hardcover): Edwards Rosen Copernicus and his Successors (Hardcover)
Edwards Rosen
R3,727 Discovery Miles 37 270 Ships in 12 - 17 working days

The essays in Copernirus and his Successors deal both with the influences on Copernicus, including that of Greek and Arabic thinkers, and with his own life and attitudes. They also examine how he was seen by contemporaries and finally describe his relationship to other scientists, including Galileo, Brahe and Kepler.

Essential Semiconductor Laser Physics (Hardcover): A. F. J Levi Essential Semiconductor Laser Physics (Hardcover)
A. F. J Levi
R1,962 Discovery Miles 19 620 Ships in 10 - 15 working days

The invention of the semiconductor laser along with silica glass fiber has enabled an incredible revolution in global communication infrastructure of direct benefit to all. Development of devices and system concepts that exploit the same fundamental light-matter interaction continues. Researchers and technologists are pursuing a broad range of emerging applications, everything from automobile collision avoidance to secure quantum key distribution. This book sets out to summarize key aspects of semiconductor laser device physics and principles of laser operation. It provides a convenient reference and essential knowledge to be understood before exploring more sophisticated device concepts. The contents serve as a foundation for scientists and engineers, without the need to invest in specialized detailed study. Supplementary material in the form of MATLAB is available for numerically generated figures.

The Tidal Disruption of Stars by Supermassive Black Holes - An Analytic Approach (Hardcover, 2015 ed.): Nicholas Chamberlain... The Tidal Disruption of Stars by Supermassive Black Holes - An Analytic Approach (Hardcover, 2015 ed.)
Nicholas Chamberlain Stone
R3,332 Discovery Miles 33 320 Ships in 12 - 17 working days

This book provides a general introduction to the rapidly developing astrophysical frontier of stellar tidal disruption, but also details original thesis research on the subject. This work has shown that recoiling black holes can disrupt stars far outside a galactic nucleus, errors in the traditional literature have strongly overestimated the maximum luminosity of "deeply plunging" tidal disruptions, the precession of transient accretion disks can encode the spins of supermassive black holes, and much more. This work is based on but differs from the original thesis that was formally defended at Harvard, which received both the Roger Doxsey Award and the Chambliss Astronomy Achievement Student Award from the American Astronomical Society.

Spiral Structure in Galaxies (Hardcover): Marc S Seigar Spiral Structure in Galaxies (Hardcover)
Marc S Seigar
R3,070 Discovery Miles 30 700 Ships in 10 - 15 working days

How does it happen that billions of stars can cooperate to produce the beautiful spirals that characterize so many galaxies, including ours? This book reviews the history behind the discovery of spiral galaxies and the problems faced when trying to explain the existence of spiral structure within them. In the book, subjects such as galaxy morphology and structure are addressed as well as several models for spiral structure. The evidence in favor or against these models is discussed. The book ends by discussing how spiral structure can be used as a proxy for other properties of spiral galaxies, such as their dark matter content and their central supermassive black hole masses, and why this is important.

Jean-Charles Houzeau's Escape from Texas - A Belgian Astronomer Caught in the American Civil War (Hardcover, 1st ed.... Jean-Charles Houzeau's Escape from Texas - A Belgian Astronomer Caught in the American Civil War (Hardcover, 1st ed. 2020)
Christiaan Sterken, Amy Abercrombie King
R1,518 Discovery Miles 15 180 Ships in 10 - 15 working days

Translated from the original French and annotated with figures, historical maps and commentary from the translators, this work is Jean-Charles Houzeau's account of his escape from Texas during the American Civil War. Houzeau was a Belgian astronomer who worked a couple of years as assistant astronomer at the Brussels Observatory, but eventually moved to the United States. He was living as a frontierman in Texas when the Civil War broke out, and because he took an abolitionist stance and helped slaves escape, he was forced to flee to Mexico, from where he sailed to New Orleans on board of a US military vessel. Originally titled La terreur blanche au Texas et mon 'evasion, Houzeau captured the details of his escape in 1862.The editors, an astronomer and a French language teacher, have added supplementary material to give the readers more depth and historical context to the story.

The Smell of Kerosene - A Fighter Pilot's Odyssey (Hardcover): Donald L. Mallick The Smell of Kerosene - A Fighter Pilot's Odyssey (Hardcover)
Donald L. Mallick
R1,498 Discovery Miles 14 980 Ships in 10 - 15 working days
The Myth of an Anti-Science Church - Galileo, Darwin, Teilhard, Hawking, Dawkins (Hardcover): Gerard M. Verschuuren The Myth of an Anti-Science Church - Galileo, Darwin, Teilhard, Hawking, Dawkins (Hardcover)
Gerard M. Verschuuren; Foreword by Sj Robert J Spitzer
R747 Discovery Miles 7 470 Ships in 10 - 15 working days
A Brief Welcome to the Universe - A Pocket-Sized Tour (Paperback): Neil De Grasse Tyson, Michaela Strauss, J. Richard Gott A Brief Welcome to the Universe - A Pocket-Sized Tour (Paperback)
Neil De Grasse Tyson, Michaela Strauss, J. Richard Gott
R277 Discovery Miles 2 770 Ships in 12 - 17 working days

A pocket-style edition based on the New York Times bestseller A Brief Welcome to the Universe offers a breathtaking tour of the cosmos, from planets, stars, and galaxies to black holes and time loops. Bestselling authors and acclaimed astrophysicists Neil deGrasse Tyson, Michael A. Strauss, and J. Richard Gott take readers on an unforgettable journey of exploration to reveal how our universe actually works. Propelling you from our home solar system to the outermost frontiers of space, this book builds your cosmic insight and perspective through a marvelously entertaining narrative. How do stars live and die? What are the prospects of intelligent life elsewhere in the universe? How did the universe begin? Why is it expanding and accelerating? Is our universe alone or part of an infinite multiverse? Exploring these and many other questions, this pocket-friendly book is your passport into the wonders of our evolving cosmos.

From Varying Couplings to Fundamental Physics - Proceedings of Symposium 1 of JENAM 2010 (Hardcover, 2011 ed.): Carlos Martins,... From Varying Couplings to Fundamental Physics - Proceedings of Symposium 1 of JENAM 2010 (Hardcover, 2011 ed.)
Carlos Martins, Paolo Molaro
R6,314 Discovery Miles 63 140 Ships in 10 - 15 working days

Nature is characterized by a number of physical laws and fundamental dimensionless couplings. These determine the properties of our physical universe, from the size of atoms, cells and mountains to the ultimate fate of the universe as a whole. Yet it is rather remarkable how little we know about them. The constancy of physical laws is one of the cornerstones of the scientific research method, but for fundamental couplings this is an assumption with no other justification than a historical assumption. There is no 'theory of constants' describing their role in the underlying theories and how they relate to one another or how many of them are truly fundamental. Studying the behaviour of these quantities throughout the history of the universe is an effective way to probe fundamental physics. This explains why the ESA and ESO include varying fundamental constants among their key science drivers for the next generation of facilities. This symposium discussed the state-of-the-art in the field, as well as the key developments anticipated for the coming years.

History of the Zodiac (Hardcover): Robert Powell History of the Zodiac (Hardcover)
Robert Powell
R828 Discovery Miles 8 280 Ships in 10 - 15 working days

The zodiac was first clearly defined by the Babylonians some 2500 years ago, but until recently the basis of this original definition remained unknown. This zodiac of the Babylonians, known as the sidereal zodiac because it is specified in direct relation to the stars (Latin sideris, 'starry'), was used for centuries throughout the ancient world, all the way to India, and must be distinguished from the tropical zodiac in widespread use by astrologers in the West today, which was introduced only in the middle of the second century A.D. by the Greek astronomer Claudius Ptolemy. Such was Ptolemy's influence, however, that the tropical zodiac gained prominence and, except for its survival (in a variant form) in India, knowledge of the sidereal zodiac was lost. In this thrilling study of the history of the zodiac, first submitted in 2004 as his Ph.D. thesis, Robert Powell rescues the the sidereal zodiac from the dusts of time, tracing it back to the Babylonians in the sixth/fifth centuries B.C. The implications of this discovery-among them the restitution of the sideral zodiac to its rightful place at the heart of astrology-are immense, they key point being that the signs of the sidereal zodiac, each thirty degrees long, coincide closely with the twelve astronomical constellations of the same name, whereas the signs of the tropical zodiac, since they are defined in relation to the vernal point, now have no direct relationship to the corresponding zodiacal constellations, owing to the precession of the equinoxes.This revolutionary history of the zodiac includes chapters on the Egyptian decans and the Hindu nakshatras, showing how these sidereal divisions, which originated in Egypt and India, are related to the original Babylonian zodiac. It also sheds light on the controversy surrounding the 'zodiac question' (tropical vs. sidereal), illuminating the history of the tropical zodiac-showing that originally it was not a zodiac at all, but a calendar for describing the course of the seasons This book, the fruit of thirty years of research, is intended not only for scholars but for general readers as well, and offers the clearest and most comprehensive study of the history of the zodiac yet published.

A Time Travel Dialogue (Hardcover): John W. Carroll A Time Travel Dialogue (Hardcover)
John W. Carroll
R728 Discovery Miles 7 280 Ships in 12 - 17 working days
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