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Books > Science & Mathematics > Astronomy, space & time > General
This is a revealing account of the family life and achievements of
the Third Earl of Rosse, a hereditary peer and resident landlord at
Birr Castle, County Offaly, in nineteenth-century Ireland, before,
during and after the devastating famine of the 1840s. He was a
remarkable engineer, who built enormous telescopes in the cloudy
middle of Ireland. The book gives details, in an attractive
non-technical style which requires no previous scientific
knowledge, of his engineering initiatives and the astronomical
results, but also reveals much more about the man and his
contributions - locally in the town and county around Birr, in
political and other functions in an Ireland administered by the
Protestant Ascendancy, in the development and activities of the
Royal Society, of which he was President from 1848-54, and the
British Association for the Advancement of Science. The Countess of
Rosse, who receives full acknowledgement in the book, was a woman
of many talents, among which was her pioneering work in
photography, and the book includes reproductions of her artistic
exposures, and many other attractive illustrations. -- .
Is the Earth the right model and the only universal key to
understand habitability, the origin and maintenance of life? Are we
able to detect life elsewhere in the universe by the existing
techniques and by the upcoming space missions? This book tries to
give answers by focusing on environmental properties, which are
playing a major role in influencing planetary surfaces or the
interior of planets and satellites. The book gives insights into
the nature of planets or satellites and their potential to harbor
life. Different scientific disciplines are searching for the clues
to classify planetary bodies as a habitable object and what kind of
instruments and what kind of space exploration missions are
necessary to detect life. Results from model calculations, field
studies and from laboratory studies in planetary simulation
facilities will help to elucidate if some of the planets and
satellites in our solar system as well as in extra-solar systems
are potentially habitable for life.
Greenwich has been a centre for scientific computing since the
foundation of the Royal Observatory in 1675. Early Astronomers
Royal gathered astronomical data with the purpose of enabling
navigators to compute their longitude at sea. Nevil Maskelyne in
the 18th century organised the work of computing tables for the
Nautical Almanac, anticipating later methods used in
safety-critical computing systems. The 19th century saw influential
critiques of Charles Babbage's mechanical calculating engines, and
in the 20th century Leslie Comrie and others pioneered the
automation of computation. The arrival of the Royal Naval College
in 1873 and the University of Greenwich in 1999 has brought more
mathematicians and different kinds of mathematics to Greenwich. In
the 21st century computational mathematics has found many new
applications. This book presents an account of the mathematicians
who worked at Greenwich and their achievements. Features A
scholarly but accessible history of mathematics at Greenwich, from
the seventeenth century to the present day, with each chapter
written by an expert in the field The book will appeal to
astronomical and naval historians as well as historians of
mathematics and scientific computing.
In 1908, three years after Einstein first published his special
theory of relativity, the mathematician Hermann Minkowski
introduced his four-dimensional "spacetime" interpretation of the
theory. Einstein initially dismissed Minkowski's theory, remarking
that "since the mathematicians have invaded the theory of
relativity I do not understand it myself anymore." Yet Minkowski's
theory soon found wide acceptance among physicists, including
eventually Einstein himself, whose conversion to Minkowski's way of
thinking was engendered by the realization that he could profitably
employ it for the formulation of his new theory of gravity. The
validity of Minkowski's mathematical "merging" of space and time
has rarely been questioned by either physicists or philosophers
since Einstein incorporated it into his theory of gravity.
Physicists often employ Minkowski spacetime with little regard to
the whether it provides a true account of the physical world as
opposed to a useful mathematical tool in the theory of relativity.
Philosophers sometimes treat the philosophy of space and time as if
it were a mere appendix to Minkowski's theory. In this critical
study, Joseph Cosgrove subjects the concept of spacetime to a
comprehensive examination and concludes that Einstein's initial
assessment of Minkowksi was essentially correct.
Astronomy isthemostancientsciencehumanshavepracticedonEarth.
Itisascienceofextremesandoflargenumbers:extremesoftime-fromthe big
bang to in?nity -, of distances, of temperatures, of density and
masses,
ofmagnetic?eld,etc.Itisasciencewhichishighlyvisible,notonlybecause
stars and planets are accessible in the sky to the multitude, but
also - cause the telescopes themselves are easily distinguishable,
usually on top of scenic mountains, and also because their cost
usually represent a subst-
tialproportionofthenation'sbudgetandofthetaxpayerscontributionsto
that budget. As such, astronomy cannot pass unnoticed. It touches
on the origins of matter, of the Universe where we live, on life
and on our destiny. It touches on philosophy as well as on
religion. Astronomy is the direct c-
tactofhumankindwithitsoriginsandtheimmensityofuniversalnature.It is
indeed a science of observation where experimentation is
practically - possible and which is ruled by mathematics, physics,
chemistry, statistical analysis and modelling, while o?ering the
largest number of veri?cations of the most advanced theories of
fundamental physics such as general r- st ativity and gravitation.
At the beginning of the 21 century astronomy is clearly a
multidisciplinary activity touching on all aspects of science. It
is therefore logical that in the past and still now, astronomy has
attracted the most famous scientists, be they pure observers,
mathematicians, physicists, biologists, experimentalists, and even
politicians.
Anyone who doubts that astronomy is enjoying a golden age has only
to browse the pages of Organizations and Strategies in Astronomy,
Vol. 5. Our golden age is defined not only by the enormity of new
discoveries of dark energy, dark matter, extra-solar planets, and
the evolution of Mars, but also by the breadth, diversity, and
creativity within our community. This volume records our history,
in a period of such rapid change and growth that individual
astronomers are hard-pressed to keep abreast of their own fields
and neighborhoods, much less of developments world-wide. Since the
1950's, changes in the landscape of astronomy are manifold. We have
witnessed two epochs of big telescope construction, the 4-meter
class telescopes of the '60s and '70s and the 8-to lO-meter class
telescopes of the '90s, continuing through today. We accomplished
the transition from photographic to digital data, and we continue
to improve the size and sen sitivity of astronomical detectors. We
have witnessed the flowering of radio astronomy and the opening of
the full electromagnetic spectrum through space astronomy. We have
seen the growth of national and international astronomy facilities,
and a dramatic broadening of the accessibility of data, both
through observing facilities available through open competition
based on scientific merit and through deep, rich archives of data.
The studies brought together in this second collection of articles
by Paul Kunitzsch continue the lines of research evident in his
previous volume (The Arabs and the Stars). The Arabic materials
discussed stem mostly from the early period of the development of
Arabic-Islamic astronomy up to about 1000AD, while the Latin
materials belong to the first stage of Western contact with Arabic
science at the end of the 10th century, and to the peak of
Arabic-Latin translation activity in 12th century Spain. The first
set of articles focuses upon Ptolemy in the Arabic-Latin tradition,
followed by further ones on Arabic astronomy and its reception in
the West; the final group looks at details of the transmission of
Euclid's Elements.
The hydrogen Lyman-alpha line is of utmost importance to many
fields of astrophysics. This UV line being conveniently redshifted
with distance to the visible and even near infrared wavelength
ranges, it is observable from the ground, and provides the main
observational window on the formation and evolution of high
redshift galaxies. Absorbing systems that would otherwise go
unnoticed are revealed through the Lyman-alpha forest, Lyman-limit,
and damped Lyman-alpha systems, tracing the distribution of
baryonic matter on large scales, and its chemical enrichment. We
are living an exciting epoch with the advent of new instruments and
facilities, on board of satellites and on the ground. Wide field
and very sensitive integral field spectrographs are becoming
available on the ground, such as MUSE at the ESO VLT. The giant
E-ELT and TMT telescopes will foster a quantum leap in sensitivity
and both spatial and spectroscopic resolution, to the point of
being able, perhaps, to measure directly the acceleration of the
Hubble flow. In space, the JWST will open new possibilities to
study the Lyman-alpha emission of primordial galaxies in the near
infrared. As long as the Hubble Space Telescope will remain
available, the UV-restframe properties of nearby galaxies will be
accessible to our knowledge. Therefore, this Saas-Fee course
appears very timely and should meet the interest of many young
researchers.
The aim of the VIRGO investigation (Variability of solar IRradiance
and Gravity Oscillations) on SOHO (SOlar and Heliospheric
Observatory) is to determine the characteristics of pressure and
internal gravity oscillations by observing irradiance and radiance
variations, to measure the solar total and spectral irradiance and
to quantify their variability over periods of days to the duration
of the mission. VIRGO contains two different active-cavity
radiometers for monitoring the sol- ar 'constant' (DIARAD and
PM06-V), two three-channel sunphotometers (SPM) for the measurement
of the spectral irradiance at 402, 500, and 862 nm with a bandwidth
of 5 nm, and a low-resolution imager (Luminosity Oscillation
Imager, LOI) with 12 'scientific' and 4 guiding pixels, for
measuring the radiance dis- tribution over the solar disk: at 500
nm. The instrumentation has been described in detail by Frohlich et
al. (1995). In addition, the observed in-flight performance and
operational aspects of the irradiance observations are described by
Frohlich et al. (1997), and those of the LOI by Appourchaux et al.
(1997).
The book consists of four Chapters. Chapter 1 shortly describes
main properties of space plasmas and primary CR, different types of
CR interactions with space plasmas components (matter, photons, and
frozen in magnetic fields). Chapter 2 considers the problem of CR
propagation in space plasmas described by the kinetic equation and
different types of diffusion approximations (diffusion in momentum
space and in pitch-angle space, anisotropic diffusion, anomaly CR
diffusion and compound diffusion, the influence of magnetic clouds
on CR propagation, non-diffusive CR particle pulse transport).
Chapter 3 is devoted to CR non-linear effects in space plasmas
caused by CR pressure and CR kinetic stream instabilities with the
generation of Alfven turbulence (these effects are important in
galaxies, in the Heliosphere, in CR and gamma-ray sources and in
the processes of CR acceleration). considered: the development of
the Fermi statistical mechanism, acceleration in the turbulent
plasma, Alfven mechanism of magnetic pumping, induction mechanisms,
acceleration during magnetic collapse and compression, cumulative
acceleration mechanism near the zero lines of a magnetic field,
acceleration in shear flows, shock-wave diffusion (regular)
acceleration. The book ends with a list providing more than 1,300
full references, a discussion on future developments and unsolved
problems, as well as Object and Author indexes. This book will be
useful for experts and students in CR research, Astrophysics and
Geophysics, and in Space Physics.
Photopolarimetric remote sensing is vital in fields as diverse as
medical diagnostics, astrophysics, atmospheric science,
environmental monitoring and military intelligence. The areas
considered here include: radiative transfer; dynamic systems;
backscatter polarization; biological systems; astrophysical
phenomena; comets; and instrumentation. Subtopics include
observational information including determining morphology and
chemistry, light-scattering models, and characterization
methodologies. While this introductory text highlights the latest
advances in this multi-disciplinary topic, it is also a reference
guide for the advanced researcher.
General relativity or the general theory of relativity is the
geometric theory of gravitation published by Albert Einstein in
1915. It is the current description of gravitation in modern
physics. General relativity generalises special relativity and
Newton's law of universal gravitation, providing a unified
description of gravity as a geometric property of space and time,
or spacetime. In particular, the curvature of spacetime is directly
related to the four-momentum (mass-energy and linear momentum) of
whatever matter and radiation are present. The relation is
specified by the Einstein field equations, a system of partial
differential equations. Einstein's theory has important
astrophysical implications. For example, it implies the existence
of black holes-regions of space in which space and time are
distorted in such a way that nothing, not even light, can escape-as
an end-state for massive stars. There is evidence that such stellar
black holes as well as more massive varieties of black hole are
responsible for the intense radiation emitted by certain types of
astronomical objects such as active galactic nuclei or
microquasars.
Stars are the fundamental observable constituents of the Universe.
They are the first objects we see in the night sky, they dominate
the light produced in our own and other galaxies, and
nucleosynthesis in stars produces all the elements heavier than
helium. A knowledge of stars and their evolution is vital to
understand other astrophysical objects from accreting black holes
and galaxies to the Universe itself.The structure of a star can be
described mathematically by differential equations derived from the
principles of hydrodynamics, electromagnetic theory,
thermodynamics, quantum mechanics, atomic and nuclear physics. The
basic equations of a spherical star are derived in detail at an
accessible level. The topics discussed include modes of energy
transport, the equation of state, the physics of the opacity
sources and the nuclear reactions. Attention is also given to the
virial theorem, polytropic gas spheres and homology principles and
the procedure for numerical solution of the equations is outlined.
This book tracks the evolution of stars from their main-sequence
evolution through the exhaustion of various nuclear fuels to the
end points of evolution and also introduces the topic of
interacting binary stars. The aim is to take the reader from the
essential underlying physical principles to the doors to current
research on stellar interiors.
This textbook provides students with a solid introduction to the
techniques of approximation commonly used in data analysis across
physics and astronomy. The choice of methods included is based on
their usefulness and educational value, their applicability to a
broad range of problems and their utility in highlighting key
mathematical concepts. Modern astronomy reveals an evolving
universe rife with transient sources, mostly discovered - few
predicted - in multi-wavelength observations. Our window of
observations now includes electromagnetic radiation, gravitational
waves and neutrinos. For the practicing astronomer, these are
highly interdisciplinary developments that pose a novel challenge
to be well-versed in astroparticle physics and data-analysis. The
book is organized to be largely self-contained, starting from basic
concepts and techniques in the formulation of problems and methods
of approximation commonly used in computation and numerical
analysis. This includes root finding, integration, signal detection
algorithms involving the Fourier transform and examples of
numerical integration of ordinary differential equations and some
illustrative aspects of modern computational implementation. Some
of the topics highlighted introduce the reader to selected problems
with comments on numerical methods and implementation on modern
platforms including CPU-GPU computing. Developed from lectures on
mathematical physics in astronomy to advanced undergraduate and
beginning graduate students, this book will be a valuable guide for
students and a useful reference for practicing researchers. To aid
understanding, exercises are included at the end of each chapter.
Furthermore, some of the exercises are tailored to introduce modern
symbolic computation.
'The whole text is written in a clear and light scientific style.
It is fully referenced to scientific publications and supported by
numerous figures, mainly in full colour ... The present book can be
recommended to any interested reader with a background in physics
and/or astronomy, in particular to undergraduate and graduate
students within astronomy and related fields, possibly being also
of interest to scientists in (evolutionary) biology.'Contemporary
PhysicsThe search for exoplanets and habitable objects in general
is one of the fastest growing and most prominent fields in modern
astrophysics. This book provides an overview on habitability on
exoplanets. Habitability is strongly dependent on stellar activity.
Therefore, space weather effects on objects in the solar system as
well as on exoplanets are discussed.The concept of the book is to
introduce the topics and then discuss actual scientific papers so
that the interested reader has access to most recent research.
Therefore the book is valuable to undergraduate students as well as
to graduate students and researchers.
This textbook treats Celestial Mechanics as well as Stellar Dynamics from the common point of view of orbit theory making use of the concepts and techniques from modern geometric mechanics. It starts with elementary Newtonian Mechanics and ends with the dynamics of chaotic motions. The book is meant for students in astronomy and physics alike. Prerequisite is a physicist's knowledge of calculus and differential geometry. Volume 1 begins with classical mechanics and a thorough treatment of the 2-body problem, including regularization, followed by an introduction to the N-body problem with particular attention given to the virial theorem. Then the authors discuss all important non-perturbative aspects of the 3-body problem. A final chapter deals with integrability of Hamilton-Jacobi systems.
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