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Books > Science & Mathematics > Astronomy, space & time > Cosmology & the universe
In den letzten Dekaden hat das Gebiet der klassischen dynamischen
Systeme eine beachtliche Renaissance erlebt, und manches, was beim
erst en Erscheinen dieses Kur- ses als mathematisch zu
hochgestochen erschien, ist heute Gemeingut der aktiven Physiker
geworden. Das Ziel der Neuauflage ist es, . dieser Entwicklung zu
dienen, indem ich versucht habe, das Buch leserfreundlicher zu
gestalten und Fehler auszu- merzen. Da schon die erste Auflage ffir
eine einsemestrige Vorlesung reichlich beladen war, wurde neues
Material nur in dem Mafie aufgenommen, als anderes weggelassen oder
vereinfacht werden konnte. Eine Erweiterung muf3te jedoch das
Kapitel mit dem Be- weis des KAM-Satzes erfahren, urn dem neuen
Trend in der Physik Rechnung zu tragen. Dieser besteht nicht nur in
der Verwendung feinerer mathematischer Hilfs- mittel, sondern auch
in einer Neubewertung des Wortes "fundamental". Was frfiher als
Schmutzeffekt abgetan wurde, erscheint heute als Folge eines
tieferen Prinzips. Ja so- gar diese Keplerschen Gesetze, welche die
Radien der Planetenbahnen bestimmen und die man als mystischen
Unsinn gerne verschwieg, scheinen in Richtung einer Wahrheit zu
deuten, die sich oberflachlicher Betrachtung verschlief3t:
SchachteluI). g vollkomme- ner platonischer Korper ffihrt zu
Verhaltnissen von Radien, die irrational sind, aber algebraischen
Gleichungen niederer Ordnung genfigen. Gerade solche
Irrationalzahlen lassen sich am schlechtesten durch rationale
approximieren, und Bahnen mit diesem Radiusverhaltnis sind
gegenfiber gegenseitigen Storungen am robustesten, da sie am
wenigsten unter Resonanzeffekten leiden. In letzter Zeit wurden
einige fiberraschende Resultate fiber chaotische Systeme gefunden,
doch hat ten deren Beweise leider den Rahmen dieses Buches
gesprengt und muf3ten unterbleiben.
This is a study of atomic nuclei, the properties of which find
applications in diverse fields such as medicine and the generation
of nuclear power. The explanations of nuclear structure and nuclear
reactions in terms of constituent particles led to the discovery of
new unstable particles culminating in the unified theory of
electromagnetic and weak-nuclear interactions. In this new edition
the author has updated the information and included a section on
the relevance of recent discoveries to cosmology. Advances in
accelerator and detector technology are noted and there is an
account of nuclear reactions. Mathematical material is mostly to be
found in the appendices. This book may be used as a first student
text for courses in nuclear physics.
Is there any connection between the vastness of the universe of stars and galaxies and the existence of life on a small planet out in the suburbs of the Milky Way? This book shows that there is. In a classic work, John Barrow and Frank Tipler examine the question of Mankind's place in the Universe, taking the reader on a tour of many scientific disciplines and offering fascinating insights into issues such as the nature of life, the search for extraterrestrial intelligence, and the past history and fate of our universe.
This dictionary consists of text and tables, covering all of the
areas that are fundamental to understanding our physical world, and
life within it. Included are physics - classical, relativistic,
quantum, particle, and high-energy; chemistry - inorganic, organic,
and physical; the geological sciences - geology, geophysics,
oceanography, meteorology, palaeontology, and related areas of
molecular, genetic, and evolutionary biology; and cosmology -
including astronomy, astrophysics, and the genesis and evolution of
the universe. The text features not only definitions but also
explanations, formulas, and data. Entries best presented in tabular
form are found in 70 tables that follow the text. The 5,000
definitions are both concise and rigorous, abbreviations are
spelled out, and unfamiliar terms are themselves defined.
Brian Greene's The Hidden Reality: Parallel Universes and the Deep
Laws of the Cosmos explores our most current scientific
understanding of the universe, the 'string theory' that might hold
the key to unifying nature's laws, and our continuing quest to know
more. There was a time when 'universe' meant all there is.
Everything. Yet, as physicist Brian Greene's extraordinary book
shows, ours may be just one universe among many, like endless
reflections in a mirror. He takes us on a captivating exploration
of parallel worlds - from a multiverse where an infinite number of
your doppelgangers are reading this sentence, to vast oceans of
bubble universes and even multiverses made of mathematics - showing
just how much of reality's true nature may be hidden within them.
'If extraterrestrials land tomorrow and demand to know what the
human mind is capable of accomplishing ... hand them a copy of this
book' The New York Times Book Review 'A writer of exceptional
clarity and charm ... every chapter opens level after level of
previously unimaginable, mind-expanding realities' Oliver Sacks
'The book serves well as an introduction to the multiverse and will
open up many people's eyes' John Gribbin Brian Greene is well known
to many fans as a populariser of theoretical physics. He is the
author of the bestselling books about string theory, The Elegant
Universe, which was a finalist for the Pulitzer Prize for
nonfiction, The Fabric of the Cosmos, and The Hidden Reality.
Educated at Harvard and Oxford, he has taught at both Harvard and
Cornell and has been Professor of Physics and Mathematics at
Columbia University since 1996.
The large-scale structure of the Universe is dominated by vast
voids with galaxies clustered in knots, sheets, and filaments,
forming a great 'cosmic web'. In this personal account of the major
astronomical developments leading to this discovery, we learn from
Laird A. Thompson, a key protagonist, how the first 3D maps of
galaxies were created. Using non-mathematical language, he
introduces the standard model of cosmology before explaining how
and why ideas about cosmic voids evolved, referencing the original
maps, reproduced here. His account tells of the competing teams of
observers, racing to publish their results, the theorists trying to
build or update their models to explain them, and the subsequent
large-scale survey efforts that continue to the present day. This
is a well-documented account of the birth of a major pillar of
modern cosmology, and a useful case study of the trials surrounding
how this scientific discovery became accepted.
In The Accidental Universe renowned expositor Paul Davies grapples
with the most fundamental questions of all. What is our purpose and
the purpose of the universe? Are both an accident of nature? Paul
Davies guides us through the mysterious coincidences underlying the
structure and properties of the universe we inhabit. He sets out
the intriguing hypothesis that the appearance of the universe and
its properties are highly contrived. Paul Davies gives a survey of
the range of apparently miraculous accidents of nature that have
enabled the universe to evolve its familiar structure of atoms,
stars, galaxies and life itself. This remarkable book concludes
with an investigation of the anthropic principle, which postulates
that much of what we observe around us is a consequence of the
presence of observers in the universe. This thesis of a cosmic
biological selection effect is fiercely debated among scientists
and is here set out clearly for a general readership.
For most of human history, we have led not just an earthly
existence but a cosmic one. Celestial cycles drove every aspect of
our daily lives. Our innate relationship with the stars shaped who
we are - our religious beliefs, power structures, scientific
advances and even our biology. But over the last few centuries we
have separated ourselves from the universe that surrounds us. And
that disconnect comes at a cost. In The Human Cosmos Jo Marchant
takes us on a tour through the history of humanity's relationship
with the heavens. We travel to the Hall of the Bulls in Lascaux and
witness the winter solstice at a 5,000-year-old tomb at Newgrange.
We visit Medieval monks grappling with the nature of time and
Tahitian sailors navigating by the stars. We discover how light
reveals the chemical composition of the sun, and we are with
Einstein as he works out that space and time are one and the same.
A four-billion-year-old meteor inspires a search for
extraterrestrial life. And we discover why stargazing can be
really, really good for us. It is time for us to rediscover the
full potential of the universe we inhabit, its wonder, its effect
on our health, and its potential for inspiration and revelation.
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