The joint NASA-ESA Cassini-Huygens mission promises to return four (and possibly more) years of unparalleled scientific data from the solar system's most exotic planet, the ringed, gas giant, Saturn. Larger than Galileo with a much greater communication bandwidth, Cassini can accomplish in a single flyby what Galileo returned in a series of passes. Cassini explores the Saturn environment in three dimensions, using gravity assists to climb out of the equatorial plane to look down on the rings from above, to image the aurora and to study polar magnetospheric processes such as field-aligned currents. Since the radiation belt particle fluxes are much more benign than those at Jupiter, Cassini can more safely explore the inner regions of the magnetosphere. The spacecraft approaches the planet closer than Galileo could, and explores the inner moons and the rings much more thoroughly than was possible at Jupiter. This book is the second volume, in a three volume set, that describes the Cassini/Huygens mission. This volume describes the in situ investigations on the Cassini orbiter: plasma spectrometer, ion and neutral mass spectrometer, energetic charged and neutral particle spectrometer, magnetometer, radio and plasma wave spectrometer and the cosmic dust analyzer. This book is of interest to all potential users of the Cassini-Huygens data, to those who wish to learn about the planned scientific return from the Cassini-Huygens mission and those curious about the processes occurring on this most fascinating planet. A third volume describes the remote sensing investigations on the orbiter.

Planetary nebulae present a fascinating range of shapes and morphologies. They are ideal laboratories for the study of different astrophysical processes: atomic physics, radiative transfer, stellar winds, shocks, wind-wind interaction, and the interaction between stellar winds and the interstellar medium. In addition, planetary nebulae provide information about the late stages of stellar evolution. In the last five years studies of planetary nebulae have progressed very rapidly and new phenomena and insights have been gained. This is partly due to new observations (e.g. from the Hubble Space Telescope, the ISO satellite and new infrared and millimeter spectrographs) and partly to the advancement of hydrodynamic simulations of the structures of planetary nebulae (PN). Many of these new results were reported at IAU Symposium 180 in Groningen, the Netherlands, on August 26 to 30, 1996. This symposium was dedicated to one of the pioneers of PN research: Stuart Pottasch. These proceedings contain chapters on: Introduction to PN with the basic parameters Distances of PN The central stars of PN The envelopes of PN The evolution from AGB to PN The evolution from PN to white dwarfs PN in the galactic context PN in extragalactic systems The future of PN research . The book contains 29 reviews and more than 200 shorter contributions.

Sixty-five million years ago, a gigantic asteroid collided with Earth. The resulting dust clouds and fire storm blotted out the sunlight, destroying much of the animal, plant, and fish life - most notably, the dinosaurs. What would happen if another giant asteroid found itself on a collision course with Earth? Doomsday Asteroid: Can We Survive? is the most comprehensive current book for general readers to address the threats and potential benefits of asteroids. Space experts Donald W. Cox and James H. Chestek explain the major differences between comets and asteroids and describe what might happen should the Earth suffer a collision with either one of them. Cox and Chestek present a view quite different from that of astronomers: In particular, they cover the Earth defense problem in more detail than any of the other popular works on asteroids and they are critical of the science/astronomical community and its approach to asteroid danger. They also call for establishment of an International Spaceguard Command to oversee planetary safety.

Neutron stars are the most compact astronomical objects in the universe which are accessible by direct observation. Studying neutron stars means studying physics in regimes unattainable in any terrestrial laboratory.

Understanding their observed complex phenomena requires a wide range of scientific disciplines, including the nuclear and condensed matter physics of very dense matter in neutron star interiors, plasma physics and quantum electrodynamics of magnetospheres, and the relativistic magneto-hydrodynamics of electron-positron pulsar winds interacting with some ambient medium. Not to mention the test bed neutron stars provide for general relativity theories, and their importance as potential sources of gravitational waves. It is this variety of disciplines which, among others, makes neutron star research so fascinating, not only for those who have been working in the field for many years but also for students and young scientists.

The aim of this book is to serve as a reference work which not only reviews the progress made since the early days of pulsar astronomy, but especially focuses on questions such as: "What have we learned about the subject and how did we learn it?," "What are the most important open questions in this area?" and "What new tools, telescopes, observations, and calculations are needed to answer these questions?."

All authors who have contributed to this book have devoted a significant part of their scientific careers to exploring the nature of neutron stars and understanding pulsars. Everyone has paid special attention to writing educational comprehensive review articles with the needs of beginners, students and young scientists as potential readers in mind. This book will be a valuable source of information for these groups.

Roger-Maurice Bonnet*Michel Blanc Originally published in the journal Space Science Reviews, Volume 137, Nos 1-4. DOI: 10. 1007/s11214-008-9418-0 (c) Springer Science+Business Media B. V. 2008 "Planetary Atmospheric Electricity" is the rst publication of its kind in the Space Science Series of ISSI. It is the result of a new and successful joint venture between ISSI and Eu- planet. Europlanet is a network of over 110 European and U. S. laboratories deeply involved in the development of planetary sciences and support to the European planetary space exp- ration programme. In 2004, the Europlanet consortium obtained support from the European Commission to strengthen the planetary science community worldwide, and to amplify the scienti c output, impact and visibility of the European space programme, essentially the - ropean Space Agency's Horizon 2000, Cosmic Vision programmes and their successors. Its presentcontractwiththeCommissionextendsfrom2005to2008,andincludes7networking activities, including discipline-based working groups covering the main areas of planetary sciences. A new contract with the Commission, presently under negotiation, will extend - roplanet's activities into the period 2009-2012. With the broad community connection made through its Discipline Working Groups and other activities, Europlanet offers an ideal base from which to identify new elds of research for planetary sciences and to stimulate coll- orative work among its member laboratories.

This volume focuses on isotopic signatures of volatile elements as tracers for evolutionary processes during the formation of the Sun and the planets from an interstellar molecular cloud and, in turn, illuminates how the isotopic compositions of the present-day solar system objects have been established.
The book is an integrated collection of articles by experts in planetary science, solar and plasma physics, astrophysics, mineralogy and chemistry that met for an interdisciplinary workshop at the International Space Science Institute in Bern in January 2002. The authors present analyses of isotope abundance ratios for volatile elements in the sun, planets, satellites, comets, meteorites and interplanetary dust particles, as well as a review of isotopic ratios in star-forming interstellar clouds. This provides insight into the physical and chemical processes in the pre-solar molecular cloud that collapsed to form the Sun and the solar accretion disk. Furthermore, information is presented on dynamical processes and conditions inside this protoplanetary disk, in particular the degree of reprocessing of interstellar solid material, the formation of solids inside the disks, and the formation of terrestrial and giant planets and their satellites. Isotopic fractionation processes discussed in this book include chemical reactions such as ion-molecule and photochemical reactions, nuclear processes inside the sun and in its atmosphere, plasma processes, gravitational escape of gases from planetary atmospheres exposed to the solar wind and solar radiation, thermodynamic processes, a variety of accretion and adsorption processes and mixing of material from the interstellar environment with the material of the evolving solar system.
The volume is intended to provide active researchers in the fields of planetary science and space physics with an up-to-date status report on the topic, and also to serve graduate students with introductory material into the field.

This textbook on the nature of space and time explains the new theory of Space Dynamics, which describes the dynamics of gravity as the evolution of conformal 3-dimensional geometry. Shape Dynamics is equivalent to Einstein's General Relativity in those situations in which the latter has been tested experimentally, but the theory is based on different first principles. It differs from General Relativity in certain extreme conditions. Shape Dynamics allows us to describe situations in which the spacetime picture is no longer adequate, such as in the presence of singularities, when the idealization of infinitesimal rods measuring scales and infinitesimal clocks measuring proper time fails. This tutorial book contains both a quick introduction for readers curious about Shape Dynamics, and a detailed walk-through of the historical and conceptual motivations for the theory, its logical development from first principles and a description of its present status. It includes an explanation of the origin of the theory, starting from problems posed first by Newton more than 300 years ago. The book will interest scientists from a large community including all foundational fields of physics, from quantum gravity to cosmology and quantum foundations, as well as researchers interested in foundations. The tutorial is sufficiently self-contained for students with some basic background in Lagrangian/Hamiltonian mechanics and General Relativity.

In these lectures, I have discussed a number of basic concepts that provide the necessary background to the current studies of star formation. A ?rst partwas dedicatedto illustrate the conceptofa protostar, discussing con- tions and propertiesof the collapseof a molecular core. A secondpart deals with circumstellardisks. Disks areimportantnot only to the processofstar formation itself, but also because they are in all probability the site where planets form. The age range of pre-main-sequence stars coincides with the timescales for the formation of very large planetesimals, the building blocks of planets. Studies ofdisk properties in pre-main-sequencestars ofdi?erent age, located in star-forming regions of di?erent properties, may shed light on the characteristics of planet formation processes. ISO observations can provide important (in some cases, unique) inf- mation on the various stages of the star and planet formation. I have illustrated in detail some examples, when, to my knowledge, ISO data had been reduced and analyzed. Many other programs exist, and will certainly contribute to our understanding of star formation in the near future

Causal relations, and with them the underlying null cone or conformal structure, form a basic ingredient in all general analytical studies of asymptotically flat space-time. The present book reviews these aspects from the analytical, geometrical and numerical points of view. Care has been taken to present the material in a way that will also be accessible to postgraduate students and nonspecialist reseachers from related fields.

TheFifthHEIDELBERGInternationalConferenceonDarkMatterinAst- and Particle Physics, DARK 2004, took place at Texas A&M University, College Station Texas, USA, October 3-9, 2004. It was, after Cape Town 2002, the second conference of this series held outside Germany. The earlier meetings, starting in 1996, were held in Heidelberg. Dark Matter is still one of the most exciting and central ?elds of ast- physics, particle physics and cosmology. The conference covered, as usual for this series, a large range of topics, theoretical and experimental. Theoretical talks covered SUSY/SUGRA phenomenology, which provides at present a preferred theoretical framework for the existence of cold dark matter. Also included were other possible explanations of dark matter such as SUSY Q balls, exciting New Symmetries, etc. The most important experiments in the underground search for cold and hot dark matter were presented. Talks describing the current experimental dark matter bounds, what might be obtained in the near future, and the reach of future large (i.e. one ton) detectors were given. The potential of future colliders to correlate accelerator physics with dark matter searches was also outlined. Thus the reader will be able to see the present status and future prospects in the search for dark matter. The exciting astronomical evidence for dark matter and corresponding observations concerning the Milky Way's black hole, high-redshift clusters, wakes in dark matter halos were other important topics at the conference.

Comet Hale-Bopp defines a milestone event for cometary science: it is the first "really big" comet observed with modern equipment on the ground and from space and due to that; it is considered the new reference object in cometary sciences.

At the beginning of a new era in spacecraft exploration of comets and five years after Hale-Bopp's perihelion passage these proceedings of invited and contributed papers for IAU Colloquium 186 "Cometary Science after Hale-Bopp" review the state-of-the-art knowledge on comets, the icy, dusty and most primordial left-overs of the formation disk of our own solar system.

A masterly survey of the last 13 years of Very Long Baseline Interferometry, reviewed in light of the most advanced astronomical observations. Topics covered include: Nonthermal emission from extragalactic radio sources; Principles of synchrotron emission in relation to astrophysics; Theory of relativistic jets; Young, powerful radio sources and their evolution; Scintillation in extragalactic radio sources; Radio and optical interferometry; Radio polarimetry; Unified schemes; Deep fields; Tropospheric and ionospheric phase calibration; Supernovae; VLBI for geodesy and geodynamics.

Solar physics in India has a tradition that can be traced to the setting up of the Kodaikanal Observatory in 1899 when the Madras Observatory was relocated to a high altitude site with a view to initiate observations of the sun. This conference on Magnetic Coupling between the Interior and the Atmosphere of the Sun during 2-5 December 2008 was planned to coincide with centenary of the Evershed effect discovery at Kodaikanal in 1909. The aim of this meeting was to bring to a critical focus a comprehensive - derstanding of the important issues pertaining to solar magnetism with particular emphasis on the various MHD processes that operate in the solar atmosphere. The current status of magnetic eld measurements and their implications in the light of recenttheoriesandnumericalmodelingthataddressthe fundamentalscalesandp- cessesinthehighlymagnetizedturbulentplasmawerereviewedduringthismeeting. The meeting was timely for the following reasons: Space observations such as from SOHO and TRACE have provided a wealth of multiwavelength observations onprocessesoccurringinregionsofthe atmosphereextendingfromthe photosphere up to the outer corona. With the launch of Hinode and STEREO in 2006 and of SDO (Solar Dynamics Observatory) shortly, this conference provided a platform for in-depth discussions on new results from various space missions as well as a comparison with ground-based observing facilities such as the Swedish 1-m Solar Telescope. Using sophisticated image processing techniques, such telescopes r- tinelygenerateobservationswitharesolutionbetterthan0. 1arcsec,therebyyielding more informative diagnostics for instance of the microstructure of ux tubes.

This book offers an essential compendium of astronomical high-resolution techniques. Recent years have seen considerable developments in such techniques, which are critical to advances in many areas of astronomy. As reflected in the book, these techniques can be divided into direct methods, interferometry, and reconstruction methods, and can be applied to a huge variety of astrophysical systems, ranging from planets, single stars and binaries to active galactic nuclei, providing angular resolution in the micro- to tens of milliarcsecond scales. Written by experts in their fields, the chapters cover adaptive optics, aperture masking imaging, spectra disentangling, interferometry, lucky imaging, Roche tomography, imaging with interferometry, interferometry of AGN, AGN reverberation mapping, Doppler- and magnetic imaging of stellar surfaces, Doppler tomography, eclipse mapping, Stokes imaging, and stellar tomography. This book is intended to enable a next generation of astronomers to apply high-resolution techniques. It informs readers on how to achieve the best angular resolution in the visible and near-infrared regimes from diffraction-limited to micro-arcsecond scales.

This book offers a unique review of how astronomical information handling (in the broad sense) evolved in the course of the 20th century, and especially during its second half. This volume is a natural complement to the book Information handling in astronomy published in the same series. The scope of these two volumes includes not only dealing with professional astronomical data from the collecting instruments (ground-based and space-borne) to the users/researchers, but also publishing, education and public outreach. In short, the information flow in astronomy is thus illustrated from sources (cosmic objects) to end (mankind's knowledge). The experts contributing to this book have done their best to write in a way understandable to readers not necessarily hyperspecialized in astronomy while providing specific detailed information, as well as plenty of pointers and bibliographic elements. Especially enlightening are some lessons learned' sections.

This book has grown out of lectures held at a summer school on cosmology, in response to an ever increasing need for an advanced textbook that addresses the needs of both postgraduate students and nonspecialist researchers from various disciplines ranging from mathematical physics to observational astrophysics. Bridging the gap between standard textbook material in cosmology and the forefront of research, this book also constitutes a modern source of reference for the experienced researcher in classical and quantum cosmology.

The book is an introduction to practical astrometry, dealing with the determination of positions, motions, distances and dimensions of celestial bodies ranging from quasars to artificial satellites. The main part is devoted to the description of instruments and observing techniques, and also includes the basic properties of optical instruments and a detailed description of the atmospheric effects on observations. A brief summary of the main phenomena in positional astronomy and of data treatment is given. Although classical astrometric methods are described, emphasis is put on new, more precise techniques such as CCD, optical and radio interferometry, space astrometry, etc. For this 2nd edition, the release of the Hipparcos and Tycho catalogs, the rise in CCD astrometry and the adoption of a new celestial reference frame by the IAU led to a significant modification of the text. And, especially, the outlook for astrometry has been completely rewritten.

The articles here are not only about time, they are investigations from a specific temporal perspective: the calendrical event of the millennium. This arbitrary marker has provided a challenge and focus to the International Society for the Study of Time and to thinkers in all disciplines to take stock of what has gone before and what lies ahead, approaching the event of the millennium from the standpoint of time itself, and asking critical questions about the nature and experience of time.

Divided into six areas, including literature and language, music, psychology, sociology, history, and marking time, the collection is specific in content and broad in implication. Each article makes a contribution to scholarship within an individual discipline, and yet each transcends the bounds of discipline in its approach to broader issues involving the study of time. There is no other source like The Study of Time series that focuses so intensely on the nature and experience of time from diverse perspectives in all academic disciplines. This volume reveals the range and magnitude of intellectual endeavor in interdisciplinary research inspired by the enduring human fascination with time.

IAU Transactions XXIIIB summarizes the work of the XXIIIrd General Assembly. The addresses given during the Inaugural and Closing Ceremonies are reproduced in Chapters I and III, respectively. The Proceedings of the two sessions of the General Assembly, including the Report of the Finance Committee, will be found in Chapter II. The Report of the Resolutions Committee and the Resolutions approved by the General Assembly are found in Chapter IV. The Accounts for 1994-1996 and other aspects of the administration of the Union are recorded in Chapter V, which constitutes the Report of the Executive Committee and thus provides the permanent record of the activities of the Union in the period 1994-1997. Chapter VI of this volume contains the reports of the Commission meetings in Kyoto, provided by the Commission Presidents. The Statutes, Bye-Laws and Working Rules of the Union as revised at the General Assembly are published in Chapter VII, while an updated version of the Rules for Scientific Meetings is given in Chapter VIII. Finally, Chapter IX contains lists of the countries adhering to the Union and of its approximately 8300 individual members, ordered by geographical location and commission membership as well as alphabetically (with full addresses). The IAU remains one of the few Scientific Unions in which a vigorous body of individual members contributes in a crucial way to the spirit and aims of the Union.

In a distilled and pedagogical fashion, the contributions to this volume of the famous summer school in Les Houches cover the recent developments in supersymmetric string theory, the gauge theory/string theory correspondence and string duality. Further chapters deal with quantum gravity and D-brane geometry. Black hole mechanics and cosmology are treated too, as well as the AdS-CFT correspondence. The book is a comprehensive introduction to the recent developments in string/M-theory and quantum gravity. It addresses graduate students in physics and astrophysics.

Edith Alicia M ller (1918-1995) was the IAU General Secretary from 1976 to 1979, the first woman to have this responsibility. Many friends, students and colleagues, and others who have met Edith at different occasions, give in this book their memories of her. Her fundamental work in solar physics concerned the chemical composition of the Sun, the time variation of its infra-red spectrum, and its thermal structure. Her interests were, however, far broader than that. She was heavily involved in international work for the teaching of astronomy and for the exchange program of young astronomers.

This volume collects papers presented, as invited and contributed talks or posters, at the workshop on "The NEW Rosetta targets. Obs- vations, simulations and instrument performances", which was held in CaprionOctober13-15,2003. Morethan100scientistscoveringdi?erent ?elds, such as optical and radio astronomy, laboratory experiments and modelling of comet physics and processes, as well as several Principal Investigators of the instruments on board Rosetta, participated to this highly interdisciplinary workshop. The Rosetta mission was programmed for launch in January 2003 towards the short period comet 46P/Wirtanen and the asteroids 140 Siwa and 4979 Otawara. However, due to problems with the Ariane V launcher, the launch was postponed and the European Space Agency had to identify new mission targets, suitable for a launch window at the end of February 2004. The short period comet 67P/Churyumov- Gerasimenkowaschosenasprimarytargetforthenewbaseline, together with one or two asteroids to be selected, depending on the ?v available after the Rosetta probe interplanetary orbit insertion. After the succe- ful launch of the mission on March 2nd, 2004, the new baseline foresees a double ?y-by with asteroids 21 Lutetia and 2867 Steins, on the way towards the rendezvous with the primary target, that will be reached in 2014. The papers included in this volume cover di?erent complementary ?elds: observations of the new Rosetta targets, laboratory experiments, theoreticalsimulationofcometenvironmentandprocesses,performances of the experiments on board Rosetta spacecraft, also in view of the new mission target(s). Afterthepostponementofthemissionlaunch,comet67P/Churyumov- Gerasimenko was the subject of an intense observation campaign, - tween February and June 2003.