In the twenty-first century, we take the means to measure time for granted, without contemplating the sophisticated concepts on which our time scales are based. This volume presents the evolution of concepts of time and methods of time keeping up to the present day. It outlines the progression of time based on sundials, water clocks, and the Earth's rotation, to time measurement using pendulum clocks, quartz crystal clocks, and atomic frequency standards. Time scales created as a result of these improvements in technology and the development of general and special relativity are explained. This second edition has been updated throughout to describe twentieth- and twenty-first-century advances and discusses the redefinition of SI units and the future of UTC. A new chapter on time and cosmology has been added. This broad-ranging reference benefits a diverse readership, including historians, scientists, engineers, educators, and it is accessible to general readers.

Gateway to the Moon presents the definitive history of the origins, design, and construction of the lunar launch facilities at Kennedy Space Center, the terrestrial site of one of the greatest national adventures of the 20th century, humanity's first trip to the moon. It includes archival illustrations and diagrams of locations, personnel, and equipment, from aerial views of sandy, undeveloped Cape Canaveral to some of the first photos of the mobile launchers and crawler-transporters.

Filled with the sense of wonder and pride that the earliest U.S. space achievements inspired, the book focuses on launch complexes 39A and 39B, the gigantic assemblies from which the Apollo-Saturn vehicles departed for trips into space, and on the massive eight-acre Vertical Assembly Building (renamed the Vehicle Assembly Building) and the attached Launch Control Center -- some of the most awesome buildings ever constructed. It also analyzes the technological and governmental interactions necessary to ensure success of the launches.

Originally part of Moonport, a 1978 volume in the NASA History Series, the book is based on extensive interviews with wit participants in the space program and wide access to official documents, letters, and memoranda; in addition, the authors air criticisms directed at the Kennedy Space Center team and treat in detail mistakes in launch operations and conflicts within the program. Written for a general-interest audience, with jargon and acronyms translated into everyday language, the book offers a faithful account of technology in service to humanity.

Optical interferometry is a powerful technique to make images on angular scales hundreds of times smaller than is possible with the largest telescopes. This concise guide provides an introduction to the technique for graduate students and researchers who want to make interferometric observations and acts as a reference for technologists building new instruments. Starting from the principles of interference, the author covers the core concepts of interferometry, showing how the effects of the Earth's atmosphere can be overcome using closure phase, and the complete process of making an observation, from planning to image reconstruction. This rigorous approach emphasizes the use of rules-of-thumb for important parameters such as the signal-to-noise ratios, requirements for sampling the Fourier plane and predicting image quality. The handbook is supported by web resources, including the Python source code used to make many of the graphs, as well as an interferometry simulation framework, available at www.cambridge.org/9781107042179.

Designed for a course in radio astronomy or for use as a reference for practicing engineers and astronomers, this book provides a comprehensive overview of the topic. Application boxes in each chapter cover topics like LOFAR, DSN, and VLBI. The book begins with the history of radio astronomy, then explains the fundamentals, polarization, designing radio telescopes, understanding radio arrays, interferometers, receiving systems, mapping techniques, image processing and propagation effects in relation to radio astronomy. A special chapter in the end presents the GMRT radio array as an example of the explained techniques. Features: Includes context-connection boxes, including NASA's Deep Space Network (DSN) the South Pole Telescope (SPT), the Low-Frequency Array (LOFAR), Space Very Long Baseline Interferometry (VLBI), pulsar dispersion and distance, and plane waves in conducting and dielectric media Contains several appendices including radiation potential formalism, the physics of radio spectral lines, and a table of world radio observatories View the comprehensive companion disc with hundreds of color images and figures from the text

Long before their western counterparts, Chinese astronomers developed remarkably accurate methods for making their measurements, recording detailed observations since ancient times. Of particular interest to John Williams (1797-1874), assistant secretary to the Royal Astronomical Society, were Chinese observations of comets. Noting that previous translations of these records had been incomplete, Williams sought to produce a fuller catalogue. The present work, published in 1871, presents Chinese comet observations between 611 BCE and 1640 CE, using the encyclopaedia of Ma Duanlin and the great historical Shiji as major references. Williams provides useful context in his introductory remarks, mentioning the tests by which the accuracy of the Chinese records can be verified. He also includes chronological tables and a Chinese celestial atlas, enabling comparison between the Chinese and Western systems for dates and stars respectively.

Fora general audience interested insolving mysteries in art, history, and literature using the methods of science, 'forensic astronomy' is a thrilling new field of exploration. Astronomical calculations are the basis of the studies, which have the advantage of bringing to readers both evocative images and a better understanding of the skies.
Weather facts, volcano studies, topography, tides, historical letters and diaries, famous paintings, military records, and the friendly assistance of experts in related fields add variety, depth, and interest to the work. The chosen topics are selected for their wide public recognition and intrigue, involving artists such as Vincent van Gogh, Claude Monet, Edvard Munch, and Ansel Adams; historical events such as the Battle of Marathon, the death of Julius Caesar, the American Revolution, and World War II; and literary authors such as Chaucer, Shakespeare, Joyce, and Mary Shelley. This book sets out to answer these mysteries indicated with the means and expertise of astronomy, opening the door to a richer experience of human culture and its relationship with nature.
Each subject is carefully analyzed. As an example using the study of sky paintings by Vincent van Gogh, the analytical method would include:
- computer calculations of historical skies above France in the 19th century
- finding and quoting the clues found in translations of original letters by Van Gogh
- making site visits to France to determine the precise locations when Van Gogh set up his easel and what celestial objects are depicted.
For each historical event influenced by astronomy, there would be a different kind of mystery to be solved. As an example:
- How can the phase of the Moon and time of moonrise help to explain a turning point of the American Civil War - the fatal wounding of Stonewall Jackson at Chancellorsville in 1863?
For each literary reference to astronomy, it was determined which celestial objects were being described and making an argument that the author is describing an actual event. For example, what was the date of the moonlit scene when Mary Shelley first had the idea for her novel Frankenstein?

These and more fun riddles will enchant and delight the fan of art and astronomy. "

During the last two decades, optical stellar interferometry has become an important tool in astronomical investigations requiring spatial resolution well beyond that of traditional telescopes. This book, first published in 2006, was the first to be written on the subject. The authors provide an extended introduction discussing basic physical and atmospheric optics, which establishes the framework necessary to present the ideas and practice of interferometry as applied to the astronomical scene. They follow with an overview of historical, operational and planned interferometric observatories, and a selection of important astrophysical discoveries made with them. Finally, they present some as-yet untested ideas for instruments both on the ground and in space which may allow us to image details of planetary systems beyond our own.

Although astronomical guides were available in the early nineteenth century, they tended to come from continental presses and were rarely in English. This two-volume work by the clergyman and astronomer William Pearson (1767-1847) aimed, with brilliant success, to compile data from extant sources into one of the first English practical guides to astronomy. Most of the tables were updated and improved versions, and some were wholly reconstructed to streamline the calculation processes. Sir John Herschel dubbed it 'one of the most important and extensive works on that subject which has ever issued from the press', and for his efforts Pearson was awarded the gold medal of the Astronomical Society. First published in 1824, Volume 1 chiefly comprises extensive tables to facilitate the reduction of a range of astronomical observations, including solar and sidereal movements, alongside thorough instructions. In the history of science, Pearson's work reflects the contemporary challenges of celestial study.

Spherical or positional astronomy is used primarily to map objects on the celestial sphere. In this technical work, first published in 1908 and intended for advanced students, Sir Robert Stawell Ball (1840-1913) breaks down the field into distinct areas of study. Assuming a good level of geometry and trigonometry, he begins with fundamental formulae before moving into the determination of coordinates, atmospheric refraction, the theory of cartography, and more. Each section contains exercises derived from a variety of sources, including contemporary Cambridge examinations. The coverage ranges from the calculation of stellar parallax to the geometrical principles behind the Mercator projection. Testifying to the knowledge expected of university students in the early twentieth century, Ball's book remains instructive to their modern counterparts. More accessible to the general reader, The Story of the Heavens (1885), Star-Land (1889) and A Popular Guide to the Heavens (1905) are also reissued in this series.

When this highly illustrated work first appeared in 1900, the day-to-day business of an astronomer was prone to misapprehension; the reality tended to be clouded by the temptation to imagine observatories as preoccupied with making awe-inspiring discoveries and glimpsing distant worlds. Describing himself as a hybrid between an engineer and an accountant, astronomer Edward Walter Maunder (1851 1928) explodes the romantic myths and takes the reader on an entertaining tour of the history and real purposes of the Royal Observatory at Greenwich. Founded with the sole aim of advancing navigation at sea, the observatory originally confined its activities to the accurate compilation of celestial charts. In exploring the observatory's various departments and the lives of its Astronomers Royal, Maunder shows how its remit slowly expanded into heliography, meteorology, spectroscopy and the study of magnetism, which transformed it from a tool of the Navy to a major institution in contemporary astronomy.

Cluster was one of the two missions - the other being the Solar and Heliospheric Observatory (SOHO) - constituting the Solar Terrestrial Science Programme (STSP), the first cornerstone' of ESA's Horizon 2000 Programme. After the catastrophic Ariane-5 accident on 4 June 1996 which destroyed the four Cluster spacecraft, the European Space Agency Science Programme Committee gave approval to refurbish the spare Cluster spacecraft and make it ready for flight. This new spacecraft, considered to be the first of a new fleet, is called Phoenix. In the meantime various options to repeat the Cluster four-point measurements are being studied. Since Phoenix, as the fifth Cluster spacecraft, will be equipped with the spare Cluster experiments, the instrumentation articles in this book are still appropriate to the new mission. Furthermore, the objectives of the recovery mission, the ground systems, the ground observation program and the theory and modelling efforts all remain unchanged. Thus this series of articles will continue to be essential to the Cluster community and to the general scientific community as the recovery mission is implemented.

Since its foundation in 1904, the Mount Wilson Observatory has been at the centre of the development of astrophysics. Perched atop a mountain wilderness, two mammoth solar tower telescopes and the 60- and 100-inch behemoth night-time reflectors were all the largest in the world. Research has centred around two main themes - the evolution of stars and the development of the universe. This first volume in a series of five histories of the Carnegie Institution describes the people and events, the challenges and successes that the Observatory has witnessed. It includes biographical sketches of forty of the most famous Mount Wilson pioneer astronomers working during the first half of the twentieth century. Contemporary photographs illustrate the development and use of some of the innovative instruments that filled the observatory during this time. This story brings together the elements that formed modern theories of stellar evolution and cosmology.

Spectroscopy is the principal tool used in astronomy to investigate the Universe beyond Earth's atmosphere. Through the analysis of electromagnetic radiation, spectrographs enable observers to assess the chemical composition, kinematics, and local physical properties of distant stars, nebulae, and galaxies. Thoroughly illustrated and clearly written, this handbook offers a practical and comprehensive guide to the different spectroscopic methods used in all branches of astronomy, at all wavelengths from radio to gamma-ray, and from ground and space-borne instruments. After a historical overview of the field, the central chapters navigate the various types of hardware used in spectroscopy. In-depth descriptions of modern techniques and their benefits and drawbacks help you choose the most promising observation strategy. The handbook finishes by assessing new technologies and future prospects for deep-sky observation. This text is an ideal reference for today's graduate students and active researchers, as well as those designing or operating spectroscopic instruments.

Gravitational waves were predicted 100 years ago by Einstein as part of his general theory of relativity. This volume contains the exciting results presented at IAU Symposium 338, following the announcement of the first results of the observation of the collision of neutron stars by the LIGO and Virgo Advanced detectors, and follow-up observations by many ground-based and space telescopes. These observations provided an incredible context for the talks, posters and discussions at the meeting, fostering new interactions and collaborations between physicists and astronomers in an exciting new era of multimessenger astrophysics. For the first time, space-time messengers (gravitational waves) and electromagnetic ones (visible, infrared and ultraviolet light, x-rays, gamma-rays, radio waves) can be correlated, to increase our understanding of binary systems of compact objects, rotating or exploding stars and other astrophysical phenomena. A new window has opened through which we can view the cosmos.

IAU Symposium 285 addresses studies of variability among the whole gamut of cosmic objects. While new fields involving transients, blazars, gamma-ray bursts, active galactic nuclei and quasars are still emerging, the puzzles posed by longer-term sources of variability still remain. This volume adopts an interdisciplinary theme, examining different manifestations of variability to gain new scientific insights that may be missed when one type of object or variability is studied in isolation. By integrating discussions from participants across the breadth of astronomical science, it addresses the core question: 'How can technology and collaboration be better harnessed to enhance the science requirements and outcomes?' With major new transient surveys coming online soon to lay the groundwork for LSST, the results, research tools and visions presented here will help both researchers and database managers collaborate in the exciting challenges of time-domain astronomy.

The authors measured atomic hydrogen, the principal component of the interstellar medium in the Milky Way, over a five-year period using the 25-meter radio telescope of the Netherlands Foundation for Research in Astronomy. Displayed in several projections, each map corresponds to a particular velocity interval; separation by velocity roughly corresponds to separation by distance, or by energetics. The Leiden/Dwingeloo survey covers the entire sky above declination -300, on a half-degree grid, over a velocity range of 1000 km/s at 1 km/s resolution. The limiting brightness temperature sensitivity is 0.07 K. A CD-ROM also accompanies the Atlas, and contains the entire dataset of the Leiden/Dwingeloo survey in computer-readable form. The CD-ROM also contains color images in GIF format, as well as animations displaying the 3-dimensional data cube.

Grating Spectroscopes and How to Use Them is written for amateur astronomers who are just getting into this field of astronomy. Transmission grating spectroscopes look like simple filters and are designed to screw into place on the eyepiece of a telescope for visual use, or into the camera adapter for digicam or CCD imaging. Using the most popular commercially made filter gratings - Rainbow Optics (US) and Star Analyzer (UK) - as examples, this book provides the reader with information on how to set up and use the grating one needs to obtain stellar spectrograms. It also discusses several methods on analyzing the results. This book is written in an easy to read style, perfect for getting started on the first night using the spectroscope, and specifically showing how the simple transmission filter is used on the camera or telescope. No heavy mathematics or formulas are involved, and there are many practical hints and tips - something that is almost essential to success when starting out. This book helps readers to achieve quick results, and by following the worked examples, they can successfully carry out basic analysis of the spectra.

Astrometry encompasses all that is necessary to provide the positions and motions of celestial bodies. This includes observational techniques, instrumentation, processing and analysis of observational data, reference systems and frames, and the resulting astronomical phenomena. Astrometry is fundamental to all other fields of astronomy, from the pointing of telescopes, to navigation and guidance systems, to distance and motion determinations for astrophysics. In the last few decades, new observational techniques have enabled improvements in accuracy by orders of magnitude. Starting from basic principles, this book provides the fundamentals for this new astrometry at milli- and micro-arcsecond accuracies. Topics include: basics of general relativity; co-ordinate systems; vectors, tensors, quaternions, and observational uncertainties; determination and use of the celestial and terrestrial reference systems and frames; applications of new observational techniques; present and future star catalogues and double star astrometry. This comprehensive reference will be invaluable for graduate students and research astronomers.

Reflectance and emittance spectroscopy are increasingly important tools in remote sensing and have been employed in most recent planetary spacecraft missions. They are primarily used to measure properties of disordered materials, especially in the interpretation of remote observations of the surfaces of the Earth and other terrestrial planets. This book gives a quantitative treatment of the physics of the interaction of electromagnetic radiation with particulate media, such as powders and soils. Subjects covered include electromagnetic wave propagation, single particle scattering, diffuse reflectance, thermal emittance and polarisation. This new edition has been updated to include a quantitative treatment of the effects of porosity, a detailed discussion of the coherent backscatter opposition effect, a quantitative treatment of simultaneous transport of energy within the medium by conduction and radiation, and lists of relevant databases and software. This is an essential reference for research scientists, engineers and advanced students of planetary remote sensing.

Astronomy is fundamentally an observational science and as such it is important for astronomers and astrophysicists to understand how their data are collected and analyzed. This book is a comprehensive review of current observational techniques and instruments. Featuring instruments such as Spitzer, Herschel, Fermi, ALMA, Super-Kamiokande, SNO, IceCube, the Auger Observatory, LIGO and LISA, the book discusses the capabilities and limitations of different types of instruments. It explores the sources and types of noise and provides statistical tools necessary for interpreting observational data. Due to the increasingly important role of statistical analysis, the techniques of Bayesian analysis are discussed, along with sampling techniques and model comparison. With topics ranging from fundamental subjects such as optics, photometry and spectroscopy, to neutrinos, cosmic rays and gravitational waves, this book is essential for graduate students in astronomy and physics. Electronic and colour versions of selected figures are available online at www. cambridge.org/9781107010468.

Modern x-ray data, available through online archives, are important for many astronomical topics. However, using these data requires specialized techniques and software. Written for graduate students, professional astronomers and researchers who want to start working in this field, this book is a practical guide to x-ray astronomy. The handbook begins with x-ray optics, basic detector physics and CCDs, before focussing on data analysis. It introduces the reduction and calibration of x-ray data, scientific analysis, archives, statistical issues and the particular problems of highly extended sources. The book describes the main hardware used in x-ray astronomy, emphasizing the implications for data analysis. The concepts behind common x-ray astronomy data analysis software are explained. The appendices present reference material often required during data analysis.

Simultaneously storing both spectral and spatial information, 3D spectroscopy offers a new way to tackle astrophysical problems, and opens up new lines of research. Since its inception in the eighties and early nineties, research in this field has grown enormously. Large telescopes all around the world are now equipped with integral field units, and two instruments of the James Webb Space Telescope will have integral field spectroscopic capabilities. Nowadays, more effort is dedicated to refining techniques for reducing, analysing and interpreting the data obtained with 3D spectrographs. Containing lectures from the seventeenth Winter School of the Canary Islands Astrophysics Institute, this book explores 3D spectroscopy techniques and data. A broad and balanced presentation of research in this field, it introduces astronomers to a new generation of instruments, widening the appeal of integral field spectroscopy and helping it become a powerful tool in tackling astrophysical problems.

William Parsons (1800 67), third earl of Rosse, was responsible for building the largest telescope of his time, nicknamed the 'Leviathan'. It enabled the earl to describe the spiral structure of galaxies. This volume reissues two contemporary accounts of the telescope. The first, published anonymously in 1844 and later revealed to be by Thomas Woods, provides a comprehensive description of the workings of both the 'Leviathan' and the smaller telescope which preceded it, with detailed accounts of the construction of both telescopes. The second, by another anonymous author, first appeared in the Dublin Review in March 1845, and outlines the history and problems of telescope manufacture from Galileo onwards. Together with a short account from 1842 of the Armagh observatory by its director, these works situate the telescopes, and the difficulties the earl faced during the eighteen years he took to build the 'Leviathan', in their wider context.

Several Epoch of Reionization (EoR) experiments, for example, LOFAR, MWA and PAPER, are currently under way and producing results. These very deep observations not only set constraints on when and where the first sources formed in the early Universe and began (re)ionizing the predominantly neutral all-pervasive intergalactic medium, but they also provide high-quality data for cutting edge auxiliary foreground science. Obviously studying the physical origin of the foreground emission, whether Galactic or extragalactic, is a very exciting field in its own right and is of fundamental importance for perfecting the foreground removal techniques in the cosmological experiments. These proceedings of IAU S333 address both topics through giving the clearest and widest possible view on the EoR; presenting the state-of-the-art foreground science; and discussing challenges of upcoming and planned radio facilities such as HERA and SKA.

Observational cosmology, with the help of large telescopes, combined with the capabilities of the Hubble Space Telescope and other space missions, allow astronomers to directly observe galaxy assembly over cosmic time. These developments demand that scientists are trained in the methods suited to the study of distant galaxies. This volume contains the lectures delivered at the XI Canary Islands Winter School of Astrophysics, reviewing both scientific results and the main questions in the field. It covers the study of normal galaxies, distant galaxies, and studies based on far-infrared diagnostics, it reviews quasar absorption lines, and the properties of nearby galaxies. Each chapter is written by a world expert in the field, making the book an essential reference for all astronomers working in the field of high-redshift galaxies.