Light scattering and absorption by small homogeneous particles can be worked-out exactly for spheres and infinite cylinders. Homogeneous particles of irregular shapes, when averaged with respect to rotation, have effects that can in general be well-approximated by reference to results for these two idealised cases. Likewise, small inhomogeneous particles have effects similar to homogeneous particles of the same average refractive index. Thus most problems can be solved to a satisfactory approximation by reference to the exact solutions for spheres and cylinders, which are fully stated here in the early part of the book. The sum of scattering and absorption, the extinction, is too large to be explained by inorganic materials, provided element abundances in the interstellar medium are not appreciably greater than solar, H 0 and NH3 being essentially excluded in the 2 general medium, otherwise very strong absorptions near 3p,m would be observed which they are not. A well-marked extinction maximum in the ultraviolet near 2200A has also not been explained satisfactorily by inorganic materials. Accurately formed graphite spheres with radii close to O.02p,m could conceivably provide an explanation of this ultraviolet feature but no convincing laboratory preparation of such spheres has ever been achieved.

For over three millennia, most people could understand the universe only in terms of myth, religion, and philosophy. Between 1920 and 1970, cosmology transformed into a branch of physics. With this remarkably rapid change came a theory that would finally lend empirical support to many long-held beliefs about the origins and development of the entire universe: the theory of the big bang. In this book, Helge Kragh presents the development of scientific cosmology for the first time as a historical event, one that embroiled many famous scientists in a controversy over the very notion of an evolving universe with a beginning in time. In rich detail he examines how the big-bang theory drew inspiration from and eventually triumphed over rival views, mainly the steady-state theory and its concept of a stationary universe of infinite age. In the 1920s, Alexander Friedmann and Georges Lemaître showed that Einstein's general relativity equations possessed solutions for a universe expanding in time. Kragh follows the story from here, showing how the big-bang theory evolved, from Edwin Hubble's observation that most galaxies are receding from us, to the discovery of the cosmic microwave background radiation. Sir Fred Hoyle proposed instead the steady-state theory, a model of dynamic equilibrium involving the continuous creation of matter throughout the universe. Although today it is generally accepted that the universe started some ten billion years ago in a big bang, many readers may not fully realize that this standard view owed much of its formation to the steady-state theory. By exploring the similarities and tensions between the theories, Kragh provides the reader with indispensable background for understanding much of today's commentary about our universe.

"The Universe in a Grain of Sand: Introduction to Cosmology" takes readers on a captivating journey through the mysteries of the cosmos. From the tiniest particles to the vast expanse of space, this book explores the fundamental principles of cosmology, offering a comprehensive introduction to the science of the universe. Through clear, accessible language, it delves into topics such as the origins of the universe, the nature of dark matter and energy, the evolution of galaxies, and the ultimate fate of the cosmos. With a blend of scientific insight and philosophical contemplation, this book ignites a sense of awe and curiosity about the grandeur and complexity of the universe.

IAU Transactions are published as a volume corresponding to each General Assembly. Volume A is produced prior to the Assembly and contains Reports on Astronomy, prepared by each Commission President. The intention is to summarize the astronomical results that have affected the work of the Commission since the production of the previous Reports up to a time which is about one year prior to the General Assembly. Volume B is produced after the Assembly and contains accounts of Commission Meetings which were held, together with other material. The reports included in the present volume range from outline summaries to lengthy compilations and references. Most reports are in English.

This is a revisit of a radical theory of cometary panspermia and cosmic life that was first proposed by Chandra Wickramasinghe and the late Sir Fred Hoyle in 1982. In its earliest form the theory of cosmic life started off as a speculation in 1974 after the first discovery of complex organic molecules and polymeric dust in interstellar space. The speculation soon developed into a serious scientific theory, predictions of which were available to be verified or falsified. Over four decades there have been a multitude of tests and predictions of the theory being positive in vindicating the proposition of life as a cosmic rather than a purely terrestrial phenomenon. A paradigm shift of enormous magnitude and significance is to be expected.The ideas and theories described in this book would have a far-reaching influence affecting the future development of diverse branches of science.

The idea that life is a cosmic, rather than a purely terrestrial phenomenon, has progressed from scientific heresy to mainstream science within the short timespan of a few decades. The theory of cometary panspermia developed by Fred Hoyle and the present author in the 1970's has been vindicated by a spate of new discoveries in astronomy and biology, and also with startling new evidence of microbial fossils in meteorites and micrometeorites. The recent Kepler Telescope searches for exoplanets have indicated the presence of over 100 billion habitable planets separated by only a few light years, thus making panspermia and the transfer of microbial life between such planets an inevitable fact. The book presents a comprehensive and up-to-date account of the Hoyle-Wickramasinghe theory of cometary panspermia in a manner accessible to a wide general readership.

This is the story of the author''s unique scientific journey with one of the most remarkable men of 20th century science. The journey begins in Sri Lanka, the author''s native country, with his childhood acquaintance with Fred Hoyle''s writings. The action then moves to Cambridge, where the famous HoyleOCoWickramasinghe collaborations begin. A research programme which was started in 1962 on the carbonaceous nature of interstellar dust leads, over the next two decades, to developments that are continued in both Cambridge and Cardiff. These developments prompt Hoyle and the author to postulate the organic theory of cosmic dust (which is now generally accepted), and then to challenge one of the most cherished paradigms of contemporary science OCo the theory that life originated on Earth in a warm primordial soup.This new edition examines the many scientific developments that have transpired since the first edition was published. The discovery of bacteria in the upper reaches of the atmosphere, biological signatures in meteorites, spectroscopy of high-z galaxies and more all mesh with many of the ideas that had their origin in the first edition. Pushing into the future, the updated text examines the many experiments and probes currently operating or planned that will shed more light on the theory of planetary panspermia. A Journey with Fred Hoyle is an intriguing book that delineates the progress of a collaboration spanning 40 years, through a sequence of personal reflections, anecdotes and reminiscences.

This is the story of the author's unique scientific journey with one of the most remarkable men of 20th century science. The journey begins in Sri Lanka, the author's native country, with his childhood acquaintance with Fred Hoyle's writings. The action then moves to Cambridge, where the famous Hoyle-Wickramasinghe collaborations begin. A research programme which was started in 1962 on the carbonaceous nature of interstellar dust leads, over the next two decades, to developments that are continued in both Cambridge and Cardiff. These developments prompt Hoyle and the author to postulate the organic theory of cosmic dust (which is now generally accepted), and then to challenge one of the most cherished paradigms of contemporary science — the theory that life originated on Earth in a warm primordial soup.A Journey with Fred Hoyle is an intriguing book that traces the progress of a collaboration spanning 40 years, through a sequence of personal reflections, anecdotes and reminiscences. Ideas that were thought heretical 25 years ago are now quietly slipping into the domain of orthodox science.

Cosmic Genetic Evolution, Volume 106 in the Advances in Genetics series, highlights new advances in the field, with this new volume presenting interesting chapters on Panspermia, Cometary Panspermia and Origin of Life, The Efficient Lamarckian Spread of Life in the Cosmos, The Sociology of Science and Generality of the DNA/RNA/Protein Paradigm Throughout the Cosmos, The Mutagenic Source and Power of Our Own Evolution, Origin of New Emergent Coronavirus and Candida Fungal Diseases – Terrestrial or Cosmic?, and Future Prospects for Investigation -The Near-Earth Neighborhood and Beyond. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Advances in Genetics series - Updated release includes the latest information on the Cosmic Genetic Evolution

Chaisson addresses some of the most basic issues we can contemplate: the origin of matter and the origin of life, and the ways matter, life, and radiation interact and change with time. He designs for us an expansive yet intricate model depicting the origin and evolution of all material structures.