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Books > Science & Mathematics > Astronomy, space & time

Photometric and Spectroscopic Binary Systems - Proceedings of the NATO Advanced Study Institute held at Maratea, Italy, June... Photometric and Spectroscopic Binary Systems - Proceedings of the NATO Advanced Study Institute held at Maratea, Italy, June 1-14, 1980 (Hardcover, 1981 ed.)
E. B. Carling, Zdenek Kopal
R5,921 Discovery Miles 59 210 Ships in 10 - 15 working days

Our conference - opening today - has two aims in view: first, to commemorate some milestones in the development of the studies of close binary systems whose anniversaries fall in these years, as well as to take stock of our present knowledge accumulated through out preceding decades, in order to consider where do we go from here. This summer, 310 years will have elapsed since the first ec lipsing binary - Algol - was discovered in Bologna by Geminiano Montanari (1633-1687) to be a variable star; and 198 years have gone by since John Goodricke of York (1764-1786) established the fact that Algol's light changes were periodic. Moreover, it is al most exactly (to a month) now 100 years since Edward Charles Pickering (1846-1919) of Harvard Observatory in the United States took the first steps towards the development of systematic methods of analysis of the light changes of Algol and related systems - a topic which will constitute the major part of the programme of our present conference. The three dates recalled above illustrate that the discoverers of such celestial objects and observers of their light changes have been systematically ahead of the theoreticians endea vouring to understand the significance of the observed data by de cades and centuries in the past - a fact which, incidentally, con tinues to hold good (albeit with a diminishing lead-time) up to the present."

The Scientific Satellite Programme during the International Magnetospheric Study - Proceedings of the 10th ESLAB Symposium,... The Scientific Satellite Programme during the International Magnetospheric Study - Proceedings of the 10th ESLAB Symposium, Held at Vienna, Austria, 10-13 June 1975 (Hardcover, 1976 ed.)
K Knott, B. Battrick
R4,474 Discovery Miles 44 740 Ships in 10 - 15 working days

The 10th ESLAB Symposium was held at Grossenzersdorf near Vienna on 10-13 June 1975 under the title 'The Scientific Satellite Programme During the Inter national Magnetospheric Study'. The Symposium was attended by an invited audience of 60 scientists from the ESA Member States, the United States, Japan, Canada and Austria. Following a report by the joint COSPAR-IUCSTP Special Working Group, the International Magnetospheric Study (lMS) is proposed as an international co operative enterprise of limited duration, having as its principal objective the achie vement of a comprehensive, quantitative understanding of the dynamical processes operating in the Earth's plasma and field environment. In order to accomplish this objective, it is thought to be necessary to carry out simultaneous measurements with nearly identical instrumentation at various points in space. These measurements will need to be made in combination with appropriate observations at or near the Earth's surface. Besides near-Earth observations by ground-based, rocket- and balloon-borne instrumentation, satellite investigations are expected to make an important contri bution to the IMS. A number of satellites assigned to magnetospheric research have recently been launched, or will be launched shortly, to be operational during the IMS. The European Space Agency has devoted two of its forthcoming scientific satellites - GEOS and ISEE-B - to magnetospheric and interplanetary research.

A Pan-Chromatic View of Clusters of Galaxies and the Large-Scale Structure (Hardcover, 2008 ed.): Manolis Plionis, O.... A Pan-Chromatic View of Clusters of Galaxies and the Large-Scale Structure (Hardcover, 2008 ed.)
Manolis Plionis, O. Lopez-Cruz, D Hughes
R2,976 Discovery Miles 29 760 Ships in 10 - 15 working days

The reviews presented in this volume cover a huge range of cluster of galaxies topics. Readers will find the book essential reading on subjects such as the physics of the ICM gas, the internal cluster dynamics, and the detection of clusters using different observational techniques. The expert chapter authors also cover the huge advances being made in analytical or numerical modeling of clusters, weak and strong lensing effects, and the large scale structure as traced by clusters.

Observational Evidence of Activity in Galaxies - Proceedings of the 121st Symposium of the International Astronomical Union... Observational Evidence of Activity in Galaxies - Proceedings of the 121st Symposium of the International Astronomical Union Held in Byurakan, Armenia, U.S.S.R., June 3-7, 1986 (Hardcover, 1987 ed.)
E. Ye Khachikian, K.J. Fricke, J. Melnick
R5,944 Discovery Miles 59 440 Ships in 10 - 15 working days

IAU Symposium No. 121 was hosted by the Byurakan Astrophysical Observatory in Soviet Armenia, almost 30 years after Ambartsumian's pioneering ideas about galaxy activity were first published and almost exactly 20 years after the first Byurakan IAU symposium on nuclear activity (No. 29, "Non-stable Phenomena in Galaxies, May 1966). Although the proceedings of the first Byurakan symposium were not published in English, that conference provided a definitive impulse to the field, as Ambartsumian's ideas had done 10 years earlier. The Byurakan Astrophysical Observatory was thus a particularly appropriate setting for IAU 121. The symposium was also very timely since many new exciting results were presented which will surely revolutionize many of our present ideas about nuclear activity in galaxies and QSO's. The first results of the by now famous Markarian survey were presented by B.E. Markarian in the first Byurakan conference. Unfortunately, his untimely death prevented him from attending the second conference, but the influence of his fundamental work was certainly felt.

The Hinode Mission (Hardcover, 2008 ed.): Takashi Sakurai The Hinode Mission (Hardcover, 2008 ed.)
Takashi Sakurai
R2,887 Discovery Miles 28 870 Ships in 10 - 15 working days

The Solar-B satellite was launched in the morning of 23 September 2006 (06:36 Japan time) by the Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), and was renamed to Hinode ('sunrise' in Japanese). Hinode carries three - struments; the X-ray telescope (XRT), the EUV imaging spectrometer (EIS), and the solar optical telescope (SOT). These instruments were developed by ISAS/JAXA in cooperation with the National Astronomical Observatory of Japan as domestic partner, and NASA and the Science and Technology Facilities Council (UK) as international partners. ESA and N- wegian Space Center have been providing a downlink station. All the data taken with Hinode are open to everyone since May 2007. This volume combines the ?rst set of instrumental papers of the Hinode mission (the mission overview, EIS, XRT, and the database system) published in volume 243, Number 1 (June 2007), and the second set of papers (four papers on SOT and one paper on XRT) published in Volume 249, Number 2 (June 2008). Another SOT paper cited as Tarbell et al. (2008) in these papers will appear later in Solar Physics.

Double Stars (Hardcover, 1978 ed.): W.D. Heintz Double Stars (Hardcover, 1978 ed.)
W.D. Heintz
R2,979 Discovery Miles 29 790 Ships in 10 - 15 working days

Double and multiple stars are the rule in the stellar population, and single stars the minority, as the abundance of binary systems in the space surrounding the sun shows beyond doubt. Numerous stellar features, and methods of their exploration, ensue specifically from the one but widespread property, the binary nature. Stellar masses are basic quantities for the theory of stellar structure and evolution, and they are ob tained from binary-star orbits where they depend on the cube of observed parameters; this fact illustrates the significance of orbits as well as the accuracy requirements. Useful in dating stellar history is the knowledge that components of a system, different though they may appear, are of the same origin and age. Between star formation and the genesis of binaries a direct connection can be traced. The later stages of stellar life branch into a great variety as mutual influence between the components of a close binary pair develops. Transfer and exchange of mass and the presence of angular momentum in the orbit give rise to special tracks of evolution, not found for single stars, and to peculiar spectral groups. This is not a new story but it has a new ending: The patterns of evolution involving mass transfer appear to lead ultimately to single objects."

Thermonuclear Supernovae (Hardcover, 1997 ed.): P.Ruiz- Lapuente, R. Canal, J. Isern Thermonuclear Supernovae (Hardcover, 1997 ed.)
P.Ruiz- Lapuente, R. Canal, J. Isern
R8,491 Discovery Miles 84 910 Ships in 10 - 15 working days

All theoretical and observational topics relevant to the understanding of the thermonuclear (Type Ia) supernova phenomenon are thoroughly and consistently reviewed by a panel including the foremost experts in the field. The book covers all aspects, ranging from the observations of SNe Ia at all stages and all wavelengths to the 2D and 3D modelling of thermonuclear flames in very dense plasmas. Scenarios for close binary evolution leading to SNe Ia are discussed. Particular emphasis is placed on the homogeneity vs. diversity of SNe Ia and on their use as standard candles to measure cosmological parameters. The book reflects the recent and very significant progress made in both the modelling of the explosions and in the observational field.

Mass Loss from Red Giants - Proceedings of a Conference held at the University of California at Los Angeles, U.S.A., June... Mass Loss from Red Giants - Proceedings of a Conference held at the University of California at Los Angeles, U.S.A., June 20-21, 1984 (Hardcover, 1985 ed.)
Mark Morris, Arie J. Zuckerman
R5,771 Discovery Miles 57 710 Ships in 10 - 15 working days

Red giant and supergiant stars have long been favorites of professional 6 and amateur astronomers. These enormous stars emit up to 10 times more energy than the Sun and, so, are easy to study. Some of them, specifically the pulsating long-period variables, significantly change their size, brightness, and color within about a year, a time scale of interest to a single human being. Some aspects of the study of red giant stars are similar to the study of pre-main-sequence stars. For example, optical astronomy gives us a tantalizing glimpse of star forming regions but to really investi gate young stars and protostars requires infrared and radio astronomy. The same is true of post-main-sequence stars that are losing mass. Optical astronomers can measure the atomic component of winds from red giant stars that are undergoing mass loss at modest rates 6 (M $ 10- M9/yr.). But to see dust grains and molecules properly, 5 especially in stars with truly large mass loss rates, ~ 10- M9/yr, one requires IR and radio astronomy. As this stage of copious mass loss only lasts for ~105 years one might be tempted to ask, "who cares?".

The Near Earth Asteroid Rendezvous Mission (Hardcover, Reprinted from SPACE SCIENCE REVIEWS, 82, 1998): C. T. Russell The Near Earth Asteroid Rendezvous Mission (Hardcover, Reprinted from SPACE SCIENCE REVIEWS, 82, 1998)
C. T. Russell
R4,398 Discovery Miles 43 980 Ships in 10 - 15 working days

Even before the present Administrator of NASA, Daniel Goldin, made the phrase 'better, faster, cheaper' the slogan of at least the Office of Space Science, that same office under the Associate Administrator of Lennard Fisk and its Division of Solar System Exploration under the direction of Wes Huntress had begun a series of planetary spacecraft whose developmental cost, phase CID in the parlance of the trade, was to be held to under $150M. In order to get the program underway rapidly they chose two missions without the open solicitation now the hallmark of the program. One of these two missions, JPL' s Mars Pathfinder, was to be a technology demonstration mission with little immediate science return that would enable later high priority science missions to Mars. Many of the science investigations that were included had significant foreign contributions to keep NASA's cost of the mission within the Discovery budget. The second of these missions and the first to be launched was the Near Earth Asteroid Rendezvous mission, or NEAR, awarded to Johns Hopkins University's Applied Physics Laboratory. This mission was quite different than Mars Pathfinder, being taken from the list of high priority objectives of the science community and emphasizing the science return and not the technology development of the mission. This mission was also to prove to be well under the $150M phase CID cap.

Pulsars - 13 Years of Research on Neutron Stars (Hardcover, 1981 ed.): W. Sieber, R. Wielebinski Pulsars - 13 Years of Research on Neutron Stars (Hardcover, 1981 ed.)
W. Sieber, R. Wielebinski
R5,866 Discovery Miles 58 660 Ships in 10 - 15 working days

Proceedings of IAU Symposium No. 95 held in Bonn, Federal Republic of Germany, 26-29 August 1980

Minor Bodies in the Outer Solar System - Proceedings of the ESO Workshop Held at Garching, Germany, 2-5 November 1998... Minor Bodies in the Outer Solar System - Proceedings of the ESO Workshop Held at Garching, Germany, 2-5 November 1998 (Hardcover, 2000 ed.)
A. Fitzsimmons, D. Jewitt, R.M. West
R1,261 Discovery Miles 12 610 Ships in 12 - 19 working days

This volume tries to summarize the status of observational knowledge of the Kuiper Belt. Its recent discovery has revitalized the astromomical study of the Solar System and is beginning to open new and unexpected windows on the physics of planetesimal accretion. With more and better observational data being obtained at the technological limit of current facilities, a new perception of the relationships that exist among the various classes of small Solar System bodies has emerged. The new observations have also motivated a number of fascinating theoretical studies in Solar System dynamics.

Highlights of Astronomy Volume 11B - As Presented at the XXIIIrd General Assembly of the IAU, 1997 (Hardcover, 1998 ed.):... Highlights of Astronomy Volume 11B - As Presented at the XXIIIrd General Assembly of the IAU, 1997 (Hardcover, 1998 ed.)
Johannes Andersen
R5,720 Discovery Miles 57 200 Ships in 10 - 15 working days

Since 1967, the main scientific events of the General Assemblies of the International Astronomical Union have been published in the separate series, Highlights of Astronomy. The present Volume 11 presents the major scientific presentations made at the XXIIIrd General Assembly, August 18-30, 1997, in Kyoto, Japan. The two volumes (11A+B) contain the texts of the three Invited Discourses as well as the proceedings or extended summaries of the 21 Joint Discussions and two Special Sessions held during the General Assembly.

Strategies for the Search for Life in the Universe - A Joint Session of Commissions 16, 40, and 44, Held in Montreal, Canada,... Strategies for the Search for Life in the Universe - A Joint Session of Commissions 16, 40, and 44, Held in Montreal, Canada, During the IAU General Assembly, 15 and 16 August, 1979 (Hardcover, 1980 ed.)
M.D. Papagiannis
R4,507 Discovery Miles 45 070 Ships in 10 - 15 working days

Leo Goldberg Kitt Peak National Observatory Tucson, Arizona 85726, U. S. A. Of all the reasons for exploring the Universe, none is more com pelling than the possibility of discovering intelligent life elsewhere in the Universe. Still the quest for extraterrestrial life has been near the bottom of the astronomers' list of priorities, not because the number of extraterrestrial civilizations is conjectured to be van ishingly small, but because our powers of detection were thought to be far too weak. About ten years ago, however, the growing reach of ra dio telescopes on the ground and of optical and infrared telescopes in space persuaded a number of thoughtful astronomers that the time for a more serious search had arrived. Accordingly, a joint Soviet-American conference on the problems of Communication with Extraterrestrial In telligence was convened at the Byurakan Astrophysical Observatory of the Armenian Academy of Sciences during September 5-11, 1971 and was soon followed by a number of other important meetings, notably a series of NASA-sponsored workshops in the USA held between January, 1975 and May, 1976. Since SETI is fundamentally an international undertaking and as tronomical methods and techniques are required for its pursuit, it is natural for the International Astronomical Union to lend its support by sponsoring conferences and otherwise facilitating cooperation among countries. The active involvement of the I. A. U."

Pulsation and Mass Loss in Stars - Proceedings of a Workshop Held in Trieste, Italy, September 14-18, 1987 (Hardcover, 1988... Pulsation and Mass Loss in Stars - Proceedings of a Workshop Held in Trieste, Italy, September 14-18, 1987 (Hardcover, 1988 ed.)
R. Stalio, L.A. Willson
R4,550 Discovery Miles 45 500 Ships in 10 - 15 working days

Stellar mass loss is an essential part of the cycling of material from the interstellar medium into stars and back, and must be understood if we are to model processes on galactic to cosmological scales. The study of stellar winds and the effects of stellar mass loss has reached a particularly exciting stage where observational capabilities are increasingly able to provide interesting constraints on models and theories. Recent resu1ts from theoretical and observational work for both hot and cool stars with substantial winds have led to the suggestion that a combination of pulsation with other mechanisms makes for particularly efficient mass loss from stars. This provided the original motivation for the organization of this workshop. The conference was organized along relatively conventional lines according to the types of objects being scrutinized. However the true unity of the proceedings comes from the interplay of the mechanisms involved. For example, for the cool, luminous Mira variables, pulsation leads to shock waves that extend the atmosphere, enhancing dust formation; radiation pressure on dust drives the wind, cooling the atmosphere and in some cases suppressing the shocks. Similarly for the Be stars, both pulsation (in this case, non-radial) and radiation pressure (due to UV resonance lines) are expected to be important, and this expectation is at least qualitatively borne out by the observations.

ISO Science Legacy - A Compact Review of ISO Major Achievements (Hardcover, Reprinted from Space Science Reviews journal, Vol.... ISO Science Legacy - A Compact Review of ISO Major Achievements (Hardcover, Reprinted from Space Science Reviews journal, Vol. 119/1-4)
Catherine Cesarsky, Alberto Salama
R4,442 Discovery Miles 44 420 Ships in 10 - 15 working days

Stars are born and die in clouds of gas and dust, opaque to most types of radiation, but transparent in the infrared. Requiring complex detectors, space missions and cooled telescopes, infrared astronomy is the last branch of this discipline to come of age. After a very successful sky survey performed in the eighties by the IRAS satellite, the Infrared Space Observatory, in the nineties, brought spectacular advances in the understanding of the processes giving rise to powerful infrared emission by a great variety of celestial sources.

Outstanding results have been obtained on the bright comet Hale-Bopp, and in particular of its water spectrum, as well as on the formation, chemistry and dynamics of planetary objects in the solar system. Ideas on the early stages of stellar formation and on the stellar initial mass function have been clarified.

ISO is the first facility in space able to provide a systematic diagnosis of the physical phenomena and the chemistry in the close environment of pre-main sequence stars, in the interstellar medium, and in the final stages of stellar life, using, among other indicators, molecular hydrogen, ubiquitous crystalline silicates, water and ices.

ISO has dramatically increased our ability to investigate the power production, excitation and fuelling mechanism of galaxies of every type, and has discovered a new very cold dust component in galaxies.

ISO has demonstrated that luminous infrared galaxies were brighter and much more numerous in the past, and that they played a dominant role in shaping present day galaxies and in producing the cosmic infrared background.

Solar-Type Activity in Main-Sequence Stars (Hardcover, 2005 ed.): Svetlana Knyazeva Solar-Type Activity in Main-Sequence Stars (Hardcover, 2005 ed.)
Svetlana Knyazeva; Roald E. Gershberg
R2,967 Discovery Miles 29 670 Ships in 10 - 15 working days

The first comprehensive monograph on this active and productive field of research investigates solar-type activity amongst the large spectrum of low- and middle-mass main sequence stars, and presents the subject in a systematic and comprehensive fashion.

Gerard and Antoinette De Vaucouleurs, v. 4 - A Life for Astronomy (Hardcover, illustrated edition): M. Capaccioli, H. Corwin Gerard and Antoinette De Vaucouleurs, v. 4 - A Life for Astronomy (Hardcover, illustrated edition)
M. Capaccioli, H. Corwin
R4,118 Discovery Miles 41 180 Ships in 12 - 19 working days
The Kaguya Mission to the Moon (Hardcover, 2011 Ed.): A. Matsuoka, C. T. Russell The Kaguya Mission to the Moon (Hardcover, 2011 Ed.)
A. Matsuoka, C. T. Russell
R4,407 Discovery Miles 44 070 Ships in 10 - 15 working days

JAXA 's Kaguya mission was successfully launched to the Moon on September 14, 2007 reaching its nominal 100 km circular orbit on October 19 after releasing two subsatellites Okina and Ouna in elliptical orbits with perilunes of 100 km and apolunes of 2400 and 800 km respectively. Observations were obtained for 10 months during the nominal mission beginning in mid-December 2007 followed by 8 month extended mission where data were obtained in lower orbits.

The articles in this book were written by experts in each of the scientific areas of the Kaguya mission, and describe both the mission and the individual scientific investigations, including their objectives, the specifications of the instruments, their calibrations and initial results. This book is essential reading to all potential users of the Kaguya data and those interested in the scientific results of the mission, the properties of the lunar surface and crust and planetary exploration in general.

The stars in our eyes - Representations of the square kilometre array telescope in the South African media (Paperback): Michael... The stars in our eyes - Representations of the square kilometre array telescope in the South African media (Paperback)
Michael Gastrow
R250 R231 Discovery Miles 2 310 Save R19 (8%) Ships in 5 - 10 working days

The Square Kilometre Array (SKA) radio telescope is set to become the largest telescope on Earth, and also the largest science project in Africa. From September 2011 to August 2012, the SKA featured regularly in the South African media. In The Stars in Our Eyes, author Michael Gastrow dissects the representation of the SKA in the South African media in the period under discussion. Who were the main actors in this unfolding narrative? Who held the stage and who were marginalised? Where did gatekeeping occur and why? What was the relationship between journalists and scientists? How did the story unfold in the social media as opposed to the print media? Drawing on mass communication theory and science communication theory, The Stars in Our Eyes: Representations of the Square kilometre Array Telescope in the South African Media addresses critical gaps in the literature on science communication, particularly with respect to science communication in an African context.

Oort and the Universe - A Sketch of Oort's Research and Person (Hardcover, 1980 ed.): Hugo Van Woerden, W.N. Brouw,... Oort and the Universe - A Sketch of Oort's Research and Person (Hardcover, 1980 ed.)
Hugo Van Woerden, W.N. Brouw, H.C.Van De Hulst
R1,646 Discovery Miles 16 460 Ships in 10 - 15 working days

Jan H. Dort's work Ad: r>iaan Blaauw Meritus Emeritus Harry van der Laan 21 Jan Hendrik Dort and Dutch astronomy H. G. van Bueren 31 Dort's scientific importance on a world-wide scale Bengt Stromgren 39 Gart and international co-operation in astronomy D. H. Sadler 45 Reminiscences of the early nineteen-twenties Peter Van de Kamp 51 The first five years of Jan Dort at Leiden, Bart J. Bok 1924-1929 55 Early galactic structure Per Olof Lindblad 59 Early galactic radio astronomy at Kootwijk C. A. Muller 65 W. N. Christiansen Dort and his large radiotelescope 71 Ten years of discovery with Dort's Synthesis Radio Telescope R. J. Allen and R. D. Ekers 79 Gort's work on comets Maarten Schmidt 111 The evolution of ideas on the Crab Nebula L. WoUjer 117 Gort's work reflected in current studies of galactic CO W. B. Burton 123 On high-energy astrophysics V. L. Ginzburg 129 Dort and extragalactic astronomy Margaret and Geoffrey Burbidge 141 Birthday wishes John A. and Janette Wheeler 151 The Earth and the Universe Abraham H. Oort 153 The challenge of Jan Dort J. H. Bannier 157 Jan Dort at the telescope Fjeda Walraven 161 Gart Westerhout Personal recollections 163 Style of research Henk van de Hulst 165 Manuscript Jan H.

Luminous Stars and Associations in Galaxies (Hardcover, 1986 ed.): C. de Loore, A.J. Willis, P. Laskarides Luminous Stars and Associations in Galaxies (Hardcover, 1986 ed.)
C. de Loore, A.J. Willis, P. Laskarides
R5,903 Discovery Miles 59 030 Ships in 10 - 15 working days

Proceedings of the 116th Symposium of the International Astronomical Union, held at Porto Heli, Greece, May 26-31, 1985

Ideas of Space - Euclidean, Non-Euclidean, and Relativistic (Hardcover, 2nd Revised edition): Jeremy Gray Ideas of Space - Euclidean, Non-Euclidean, and Relativistic (Hardcover, 2nd Revised edition)
Jeremy Gray
R2,824 Discovery Miles 28 240 Ships in 12 - 19 working days

The history of the development of Euclidean, non-Euclidean, and relativistic ideas of the shape of the universe, is presented in this lively account by Jeremy Gray. The parallel postulate of Euclidean geometry occupies a unique position in the history of mathematics. In this book, Jeremy Gray reviews the failure of classical attempts to prove the postulate and then proceeds to show how the work of Gauss, Lobachevskii, and Bolyai, laid the foundations of modern differential geometry, by constructing geometries in which the parallel postulate fails. These investigations in turn enabled the formulation of Einstein's theories of special and general relativity, which today form the basis of our conception of the universe. The author has made every attempt to keep the pre-requisites to a bare minimum. This immensely readable account, contains historical and mathematical material which make it suitable for undergraduate students in the history of science and mathematics. For the second edition, the author has taken the opportunity to update much of the material, and to add a chapter on the emerging story of the Arabic contribution to this fascinating aspect of the history of mathematics.

Observational Tests of the Stellar Evolution Theory (Hardcover, 1984 ed.): A. Maeder, Alvio Renzini Observational Tests of the Stellar Evolution Theory (Hardcover, 1984 ed.)
A. Maeder, Alvio Renzini
R5,940 Discovery Miles 59 400 Ships in 10 - 15 working days

"If simple perfect laws uniquely rule the universe, should not pure thought be capable of uncovering this perfect set of laws without having to lean on the crutches of tediously assembled observations? True, the laws to be discovered may be perfect, but the human brain is not. Left on its own, it is prone to stray, as many past examples sadly prove. In fact, we have missed few chances to err until new data freshly gleaned from nature set us right again for the next steps. Thus pillars rather than crutches are the observations on which we base our theories; and for the theory of stellar evolution these pillars must be there before we can get far on the right track. " These words written by Martin Schwarzschi1d in his famous book en titled "Structure and Evolution of the Stars"(1958) remind us how necessary and fruitful is the interplay of stellar evolution theory and observations. Clearly, observations are the great censor by their possibility of confirming or contradicting theoretical constructions. In addition, they have a driving role: new and sometimes unexpected facts may give rise to progressive ideas and stimulate further theoretical developments. In turn, theory, in its major role of sifting out and placing the facts in a logical sequence based on physical laws, must also be predictive and indicate new and pertinent observations to be undertaken."

Dynamics and Evolution of Minor Bodies with Galactic and Geological Implications - Proceedings of the Conference Held in Kyoto,... Dynamics and Evolution of Minor Bodies with Galactic and Geological Implications - Proceedings of the Conference Held in Kyoto, Japan, from October 28 to November 1, 1991 (Hardcover, Reprinted from Celestial Mecha ed.)
Victor Clube, Etc, S. Yabushita, J. Henrard
R3,167 Discovery Miles 31 670 Ships in 10 - 15 working days

Minor bodies in the Solar System, though representing only a small fraction of the mass in the Solar System, may well play a fundamental role in terrestrial evolution. This book contains investigations of the dynamics and physics of comets, asteroids and meteor streams, and the rather controversial topic of periodic phenomena in the Solar System as signified by geological records, together with several associated developments in celestial dynamics. All these problems are interwoven. This book makes a contribution towards unravelling the nature of the interactions between the Earth and its celestial environment.

Interior Modelling of Massive Stars in Multiple Systems (Hardcover, 1st ed. 2021): Cole Johnston Interior Modelling of Massive Stars in Multiple Systems (Hardcover, 1st ed. 2021)
Cole Johnston
R4,602 Discovery Miles 46 020 Ships in 10 - 15 working days

This thesis by Cole Johnston brings novel insights into the inner workings of young massive stars. By bridging the observational fields of binary stars and asteroseismology this thesis uses state of the art statistical techniques to scrutinise theories of modern stellar astrophysics. Developing upon the commonly used isochrone fitting methodology, the author introduces the idea of isochrone cloud fitting in order to account for the full breadth of physics observed in stars. The author combines this methodology with gravity mode asteroseismic analysis to asses the level of chemical mixing deep within the stellar core in order to determine the star's age and core mass. Wrapped into a robust statistical framework to account for correlations, this methodology is employed to analyse individual stars, multiple systems, and clusters alike to demonstrate that chemical mixing has dramatic impact on stellar structure and evolution.

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