Galileo's groundbreaking dialogues are a summation of three decades of scientific work he had undertaken in the fledgling field of physics. This edition includes the diagrams crucial for understanding the text. Writing these dialogues in 1638, the elderly Galileo had a life of achievements behind him. Despite attempts at suppression of his writings by the Roman Inquisition, his ideas were successfully communicated across Europe. The motion of objects and resistance to such motion, the concept of velocity, and the laws of gravity are merely a few of the topics covered in these detailed dialogues. At the outset, we are introduced to the three conversation partners: Salviati, Sagredo and Simplicio. These three Venetians embark on a scientific discussion, hoping to explain the curiosities of things such as speed and movement. Over the course of four days, their meetings grow in complexity and scope as they strive to explain physical phenomena.

The growing number of scientific and technological applications of plasma physics in the field of Aerospace Engineering requires that graduate students and professionals understand their principles. This introductory book is the expanded version of class notes of lectures I taught for several years to students of Aerospace Engineering and Physics. It is intended as a reading guide, addressed to students and non-specialists to tackle later with more advanced texts. To make the subject more accessible the book does not follow the usual organization of standard textbooks in this field and is divided in two parts. The first introduces the basic kinetic theory (molecular collisions, mean free path, etc.) of neutral gases in equilibrium in connection to the undergraduate physics courses. The basic properties of ionized gases and plasmas (Debye length, plasma frequencies, etc.) are addressed in relation to their equilibrium states and the collisional processes at the microscopic level. The physical description of short and long-range (Coulomb) collisions and the more relevant collisions (elementary processes) between electrons' ions and neutral atoms or molecules are discussed. The second part introduces the physical description of plasmas as a statistical system of interacting particles introducing advanced concepts of kinetic theory, (non-equilibrium distribution functions, Boltzmann collision operator, etc). The fluid transport equations for plasmas of electron ions and neutral atoms and the hydrodynamic models of interest in space science and plasma technology are derived. The plasma production in the laboratory in the context of the physics of electric breakdown is also discussed. Finally, among the myriad of aerospace applications of plasma physics, the low pressure microwave electron multipactor breakdown and plasma thrusters for space propulsion are presented in two separate chapters.

Many physical properties of our universe, such as the relative strength of the fundamental interactions, the value of the cosmological constant, etc., appear to be fine-tuned for existence of human life. One possible explanation of this fine tuning assumes existence of a multiverse, which consists of a very large number of individual universes having different physical properties. Intelligent observers populate only a small subset of these universes, which are fine-tuned for life. In this book we will review several interesting metamaterial systems, which capture many features of important cosmological models and offer insights into the physics of many other non-trivial spacetime geometries, such as microscopic black holes, closed time-like curves (CTCs) and the Alcubierre warp drive.

Cosmology is the study of the origin, size, and evolution of the entire universe. Every culture has developed a cosmology, whether it be based on religious, philosophical, or scientific principles. In this book, the evolution of the scientific understanding of the Universe in Western tradition is traced from the early Greek philosophers to the most modern 21st century view. After a brief introduction to the concept of the scientific method, the first part of the book describes the way in which detailed observations of the Universe, first with the naked eye and later with increasingly complex modern instruments, ultimately led to the development of the "Big Bang" theory. The second part of the book traces the evolution of the Big Bang including the very recent observation that the expansion of the Universe is itself accelerating with time.

Visual Astronomy introduces the basics of observational astronomy, a fundamentally limitless opportunity to learn about the universe with your unaided eyes or with tools such as binoculars, telescopes, or cameras.

Structure and Evolution of Single Stars: An introduction is intended for upper-level undergraduates and beginning graduates with a background in physics. Following a brief overview of the background observational material, the basic equations describing the structure and evolution of single stars are derived. The relevant physical processes, which include the equation of state, opacity, nuclear reactions and neutrino losses are then reviewed. Subsequent chapters describe the evolution of low-mass stars from formation to the final white dwarf phase. The final chapter deals with the evolution of massive stars.

This is an in-depth look at baryon number violation in the Standard Model including the necessary background in finite temperature field theory, plasma dynamics and how to calculate the out of equilibrium evolution of particle number densities throughout a phase transition. It is a self-contained pedagogical review of the theoretical background to electroweak baryogenesis as well as a summary of the other prevailing mechanisms for producing the asymmetry between matter and antimatter using the Minimal Supersymmetric Standard Model as a pedagogical tool whenever appropriate.

The diverse planetary environments in the solar system react in somewhat different ways to the encompassing influence of the Sun. These different interactions define the electrostatic phenomena that take place on and near planetary surfaces. The desire to understand the electrostatic environments of planetary surfaces goes beyond scientific inquiry. These environments have enormous implications for both human and robotic exploration of the solar system. This book describes in some detail what is known about the electrostatic environment of the solar system from early and current experiments on Earth as well as what is being learned from the instrumentation on the space exploration missions (NASA, European Space Agency, and the Japanese Space Agency) of the last few decades. It begins with a brief review of the basic principles of electrostatics.

This book presents a brief compilation of results from nearly a century of research on the globular star clusters in the Andromeda Galaxy (M31). It explores the techniques and limitations of the observations, the successes and challenges of the models, and the paradigm for the formation of M31 that has gradually emerged. These results will eventually be superseded by new data, better analysis techniques, and more complex models. However, the emphasis of this book is on the techniques, thought processes, and connections with other studies.

In this book we will look at what planetary nebulae are, where they come from and where they go. We will discuss what mechanisms cause these beautiful markers of stellar demise as well as what causes them to form their variety of shapes. How we measure various aspects of planetary nebulae such as what they are made of will also be explored. Though we will give some aspects of planetary nebulae mathematical treatment, the main points should be accessible to people with only a limited background in mathematics. A short glossary of some of the more arcane astronomical terms is at the end of the book to help in understanding. Included at the end of each chapter is an extensive bibliography to the peer reviewed research on these objects and I would encourage the reader interested in an even deeper understanding to read these articles.

Full color publication. NP-2009-066-GSFC. This colorful book provides concise explanations and descriptions-easily read and readily understood-of what is now known of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and sun-climate.

Presents an entertaining and accessible approach whilst also providing a rigorous and comprehensive presentation of the subject. Describes how to unveil the ages of stellar populations in distant galaxies that we cannot resolve into individual stars. Contains historical notes about these techniques, outstanding major problems, and a discussion on future developments in the field.

Presents an entertaining and accessible approach whilst also providing a rigorous and comprehensive presentation of the subject. Describes how to unveil the ages of stellar populations in distant galaxies that we cannot resolve into individual stars. Contains historical notes about these techniques, outstanding major problems, and a discussion on future developments in the field.

This book is intended to be a course about the creation and evolution of the universe at large, including the basic macroscopic building blocks (galaxies) and the overall large-scale structure. This text covers a broad range of topics for a graduate-level class in a physics department where students' available credit hours for astrophysics classes are limited. The sections cover galactic structure, external galaxies, galaxy clustering, active galaxies, general relativity and cosmology.

This book is the Second Edition of the ground-breaking book on faster-than-light travel Bright Stars, Bright Universe: Advancing Civilization by Colonization of the Solar System and the Stars using a Fast Quark Drive which described a new approach to spacecraft propulsion that could enable Mankind to travel to the stars, and beyond, to the galaxies of the known universe. In this edition we add Appendices to the original edition (together with a few minor changes to the First Edition) on Seeing and Navigating through the Cosmos on superluminal starships; Complex Thrust using Braided Accelerators; Suspended Animation to keep the biological clocks of starship occupants in sync with earth time; Engineering very long life starship and life support components; Robot guidance and robot exploratory starships; and Fuel consumption on starships. At the time of this writing the United States appears headed towards a deficit of ten or eleven trillion dollars over the next ten years. It appears that a likely cost for starship R&D would be of the order of half a trillion dollars spread over perhaps thirty years - a small amount relative to the projected US deficit - with an enormous reward for success. On a yearly basis this expense averages to about seventeen billion dollars per year. Since the NASA budget is eighteen billion dollars a year, the cost of the starship program is comparable and quite affordable. The formation of an international consortium would further reduce the per country costs. If the United States paid sixty per cent of the costs then its share would be about ten billion dollars per year. It is a venture of great significance to the future of Mankind. The cost is relatively small; the benefits are potentially enormous! In a series of recent books we explored the theoretical importance of superluminal (faster-than-light) particles called tachyons in the derivation of the form of the Standard Model of Elementary Particles. We also showed some of the remarkable features of superluminal particles such as reverse fission, length dilation, and time contraction - quite the opposite of sublight phenomena. In this book we examine the possibility of superluminal starship propulsion for interstellar exploration and colonization. We begin the book with a statement of the earth's present condition and the need to expand into space or face a slow decline into a cultural and social miasma. Then we develop a new plan for the exploration and colonization of this solar system since it appears that current announced plans have missed the mark and do not have an overall long-term approach. Since this solar system lacks enough planets that are congenial for human life we consider the possibility of colonizing planets around other stars. Many plans have been proposed for interstellar spaceships - starships. But they are usually impractical for some good reason(s). In this book we will consider superluminal (beyond light speed) starships based on tachyon dynamics. They provide a practical means of starship propulsion although much R&D must be done before the proposed starships can be built. Once built they will support speeds up to 5,000 to 30,000 times the speed of light and beyond making the universe Mankind's backyard. Travel times to other galaxies could be as short as a few months. Superluminal starships open the door to a vast expansion of humanity into the universe in the large! As world population grows, and human social needs also grow, the capacity of the world to mount a major space effort will diminish. So a major space initiative with a well-thought out game plan is required now, while we still have the resources.