Deep-sky observing - that's looking at the stars, nebulae and galaxies - is easily the most popular field for amateur astronomers. The big problem faced by non-professional observers is what to look at - what's visible at a paticular time of year. The Deep-sky Observer's Year is a month-by-month guide to the best objects to view. Objects are given a "star rating" according to how difficult they are to observe or image (i.e. photograph) with a particular size of telescope. The book includes many images produced by amateur astronomers, as well as photographs from NASA, ESA and ESO. There is also some background information about the objects that can be seen, along with lots of useful tips, hints, and resources (especially about what's available on the Internet) for deep-sky observers.

The discovery of life on other planets would be perhaps the most momentous revelation in human history, more disorienting and more profound than either the Copernican or Darwinian revolutions, which knocked the earth from the center of the universe and humankind from its position of lofty self-regard. In Here Be Dragons, astronomer David Koerner and neurobiologist Simon LeVay offer a scientifically compelling and colorful account of the search for life beyond Earth.
The authors survey the work of biologists, cosmologists, computer theorists, NASA engineers, SETI researchers, roboticists, and UFO enthusiasts and debunkers as they attempt to answer the greatest remaining question facing humankind: Are we alone? From their "safe haven of skepticism" the authors venture into the "rough seas of speculation," where theory and evidence run the gamut from hard science to hocus pocus. Arguing that the universe is spectacularly suited for the evolution of living creatures, Koerner and LeVay give us ringside seats at the great debates of Big Science. The contenitous arguments about what really happens in evolution, the acrimonious UFO controversy, and the debate over intelligence versus artificial intelligence shed new light on the wildly divergent claims about the universe and life's place in it. The authors argue that while no direct evidence of extraterrestrial life yet exists, habitats and chemical building blocks for life abound in the universe. A wealth of new astronomical techniques and space missions may provide this evidence early in the next century.
Lucidly written and scientifically rigorous, Here Be Dragons presents everything we know thus far about the emergence of intelligent life here on earth and, perhaps, beyond.

How old is our Universe? At what speed is our Universe expanding? Is our universe flat or curved? How is the hierarchical structure of the present Universe formed? The purpose of IAU Symposium 183 on the Cosmological Parameters and the Evolution of the Universe was to encourage a state-of-the-art discussion and assessment of cosmology by putting together the latest observational data and theoretical ideas on the evolution of the universe and cosmological parameters. In this volume, excellent reviews on these subjects by distinguished scientists are included. The first article by M.S. Longair, `Cosmological Parameters and the Evolution of the Universe: Progress and Prospect', is a magnificent general review which can be understood by non-specialists. The other reviews include Hubble Constants (W.L. Freedman, G.A. Tammann), Microwave Background Radiation (R.B. Partridge, N. Sugiyama), Galaxy Formation and Evolution (R.S. Ellis) and Alternative Cosmological Models (J.V. Narlikar). In addition to the reviews, recent observational and theoretical developments by outstanding active scientists are included.

Did you know? . . .

• Russia’s October Revolution in 1917 actually occurred on November 7th
• For centuries, Britain and the colonies rang in the New Year on March 25th
• The Roman Empire originally observed an eight-day week
• The anno Domini (a.d.) year-counting system is wrong, and Jesus’ birth actually occurred some years before December 25, 1 b.c.

These are just a few of the little-known facts that you will find in acclaimed author Duncan Steel’s eye-opening chronicle of the evolution of the calendar, Marking Time: The Epic Quest to Invent the Perfect Calendar.

Steel takes you across the full span of recorded history, behind the seismic shifts within politics, religion, and science, and examines the ways in which people and events forged the calendar that we have today. Starting with Stonehenge and the first written records of the year and the day by the Sumerians around 3500 b.c., Marking Time charts the calendar’s ever-changing, erratic trajectory–from the Egyptians’ reliance on the star Sirius to the numbering of the years, linked to the celebration of Easter in Christian churches.

You will also gain insight into:

• The mystery of the missing ten days
• The Venerable Bede and the origins of the anno Domini dating system
• How and why comets have been used as clocks
• Julius Caesar’s 445-day-long Year of Confusion
• Why there is no year zero between 1 b.c. and 1 a.d.
• Whether the year 2100 should be a double-leap year

A provocative history lesson and a unique, entertaining read rolled into one, Marking Time will leave you with a sense of awe at the random, hit-or-miss nature of our calendar’s development–a quality that parallels the growth of civilization itself. What results is a truthful, and, above all, very human view of the calendar as we know it. After reading Marking Time, you will never look at the calendar the same way again.

What are the origins of the years, months, and days that give our lives their familiar rhythm?

In Marking Time: The Epic Quest to Invent the Perfect Calendar, astronomer and acclaimed author Duncan Steel marches through human history to deliver a fascinating, milestone-by-milestone look at how the modern-day calendar came to be. From the definition of the lunar month by Meton of Athens in 432 b.c., through present-day proposals to reform our calendar, Steel captures the often-flawed but always fascinating story of the calendar’s evolution.

Here, you will discover fun facts and surprising anecdotes as the author visits with some of the seminal figures of the past–Julius Caesar, William the Conqueror, and Benjamin Franklin among them–as well as some lesser-known names, all of whom left an indelible mark on how we record time. You will also gain an in-depth look at the role science, astronomy, religion, politics, and even war played in various calendrical systems, including the one hanging on your wall. Open up a copy of Marking Time and, as the author puts it, "read, puzzle, and enjoy."

"Guaranteed to satisfy the appetite of interested lay readers for all the facts. Gourmet reading!" – Library Journal on Steel’s Rogue Asteroids and Doomsday Comets

Distance determination - finding out how far away different astronomical objects are - is an essential and currently highly topical subject in astronomy. A great deal of progress has been made during the last part of the 20th century. Measuring the Universe provides a unified treatment of the various techniques used for distance determination. It begins by describing methods to measure distances on Earth then gradually climbs the "distance ladder" to enable us to estimate the distance to the farthest objects, ending with a discussion of particle horizons within an expanding and inflationary universe. Aimed at first-year undergraduates of astronomy and astrophysics, the book emphasises general physical principles rather than mathematical detail. The text is enhanced and complemented by the use of many worked examples, and questions and problem solving exercises at the end of each chapter.

A discussion of the implications for philosophy of recent experimental results that confirm some counterintuitive aspects of the way matter behaves. The authors show that a generalised principle of complementarity is pervasive not only in physical theories such as cosmological models of the universe, but also in the construction of all human realities. They discuss in detail Bells inequalities for quantum mechanical measurements as well as recent experiments which imply that even remote parts of the universe are "entangled." They go on to suggest that consciousness can no longer be divorced from the way science operates, and conclude by claiming that this entails a new way of understanding the universe - one that could obviate much of the current conflict between science and religion while providing at the same time a basis for valuation that is better suited for co-ordinating all human experience. This second edition has been completely rewritten and brought up to date.

The 186th IAU Symposium came at an exciting and perhaps even historic time for extragalactic astronomy. New spacecraft observations plumbed the depths of the Universe out to redshifts of five, while revealing astounding details of nearby galaxies and AGN at intermediate redshifts. Theoretical ideas on structure formation, together with results from detailed numerical modeling, created a comprehensive framework for modeling the formation of galaxies and the transformation of galaxies by interactions and mergers. All these strands came together at the Symposium, as participants glimpsed a developing synthesis highlighting galactic encounters and their role in the history of the Universe. This volume offers professional astronomers, including PhD students, an overview of the rapidly advancing subject of galaxy interactions at low and high redshifts.

Many people have observed that the "new cosmology" seems to have an affinity to, or at least room for, a religious understanding of the nature of reality. Why is this so, and what does it mean for contemporary spirituality? In this book Paul Brockelman argues that the new scientific cosmology also functions as a religious creation story, or "cosmogony," with the power to provide our culture with a new vision of an ultimately meaningful sacred reality, and a corresponding basis for a comprehensive guide to living.

This book provides a comprehensive, critical study of the oldest and most famous argument for the existence of God: the Cosmological Argument. Professor Rowe examines and interprets historically significant versions of the argument from Aquinas to Samuel Clarke and explores the major objections that have been advances against it. Beginning with analyses of the Cosmological Argument as expressed by Aquinas and Duns Scotus in the thirteenth century, the author seeks to uncover, clairfy , and critically explore the philosophical concepts and theses essential to the reasoning exhibited in the principal versions of the Cosmological Argument. The major focus of the book is on the form that the argument takes in the eighteenth century, principally in the writings of Samuel Clarke. The author concludes with a discussion of the extent to which the Cosmological Argument may provide a justification for the belief in God. In a new Preface, the author offers some updates on his own thinking as well as that of others who have grappled with this topic.

The Planetary Scientist's Companion is a comprehensive and practical book of facts and data about the Sun, planets, asteroids, comets, meteorites, and Kuiper belt and Centaur objects in our solar system. Also covered are properties of nearby stars, the interstellar medium, and extra-solar planetary systems.

The Quest To Discover Life Beyond Earth.

"The 'dreams' that I write of are not the usual ones, the images that come up in our minds involuntarily during certain stages of sleep, but rather the hopes and expectations that we have lavished upon other worlds around us."—from the Preface.

The surprisingly long history of debate over extraterrestrial life is full of marvelous visions of what life "out there" might be like, as well as remarkable stories of alleged sightings and heated disputes about the probability that life might actually have arisen more than once. In Planetary Dreams, acclaimed author Robert Shapiro explores this rich history of dreams and debates in search of the best current answers to the most elusive and compelling of all questions: Are we alone?

In his pursuit, he presents three contrasting views regarding how life might have started: through Divine Creation, by a highly unlikely stroke of luck, or by the inevitable process of a natural law that he terms the Life Principle. We are treated to a lively fictional dinner debate among the leading proponents of these schools of thought—with the last named group arguing that life has almost surely formed in many places throughout the universe, and the others that life may well be entirely unique to our own blue planet. To set the stage for a deep exploration of the question, the author then leads us on a fantastic journey through the museum of the cosmos, an imagined building that holds models of the universe at different degrees of magnification. We then journey deep into inner space to view the astonishingly intricate life of a single cell, and learn why the origin of such a complex object from simple chemical mixtures poses one of the most profound enigmas known to science.

Writing in a wonderfully entertaining style, Shapiro then reviews the competing theories about the start of life on Earth, and suggests the debate may best be settled by finding signs of life on the other worlds of our solar system. He takes us on a guided tour of the most likely sites, from the underground hot springs of Mars to the ice-covered oceans of Jupiter's airless moons.

Along the way, he shares a wealth of fascinating stories about the ways in which our views of the heavens have changed, from the theories of ancient philosphers, who argued that the Moon was inhabited, to the current Origins and Astrobiology initiatives of NASA. He describes the probes that will be sent out in the near future in pursuit of the first compelling physical evidence of life beyond Earth, and concludes with a radical suggestion about how this quest might be supported through the next millennium. As we launch into an exciting new era of space exploration, Planetary Dreams offers a thoughtful and entertaining exploration of both the history of our hopes and expectations and a vision of a possible future in which the discovery of life elsewhere will provide a new view of our place in the universe.

An analysis of one of the three great papers Einstein published in 1905, each of which was to alter forever the field it dealt with. The second of these papers, "On the Electrodynamics of Moving Bodies", established what Einstein sometimes referred to as the "so-called Theory of Relativity". Miller uses the paper to provide a window on the intense intellectual struggles of physicists in the first decade of the 20th century: the interplay between physical theory and empirical data; the fiercely held notions that could not be articulated clearly or verified experimentally; the great intellectual investment in existing theories, data, and interpretations - and associated intellectual inertia - and the drive to the long-sought-for unification of the sciences. Since its original publication, this book has become a standard reference and sourcebook for the history and philosophy of science; however, it can equally well serve as a text on twentieth-century philosophy.

Transient phenomena are short-lived astronomical events, unusual in a science in which time is more often measured in millennia than milliseconds. There is a fascination with transient phenomena, predictable or otherwise, that astronomers of all abilities share. In Meteors, Comets, Supernovae, Neil Bone gives guidelines for observers, including the best possible periods (months or years) to see seasonal but unpredictable phenomena like meteors and sunspots. Recording such outbursts involves visual observing techniques, photography, and even the relatively new field of the video recording of meteors, which are also examined in detail. The book also includes material about phenomena that occur in the lower atmosphere (such as "ozone eaters", nacreous clouds, solar and lunar haloes), which although not strictly astronomical in their nature attract the attention of dedicated sky-watchers.

For most of human history, we have had a close relationship with the stars. Once they shaped our religious beliefs, power structures, scientific advances and even our biology. But over the last few centuries we have separated ourselves from the universe that surrounds us. And it comes at a cost. The Human Cosmos is a tour of this history: from the Hall of the Bulls in Lascaux to Tahitian sailors navigating by the stars; from medieval monks grappling with the nature of time to Einstein realising that space and time are the same. It shows we need to rediscover the universe we inhabit, its effect on our health, and its potential for inspiration and revelation.

Black holes are the most extreme objects in the universe, yet every galaxy harbours a black hole at its centre. In Einstein's Monsters, Chris Impey builds on this profound discovery to explore questions at the cutting edge of cosmology, such as what happens if you travel into a black hole and whether the galaxy or its black hole came first. Impey chronicles the role black holes have played in theoretical physics. He then describes the phenomena that scientists have witnessed while observing black holes: dozens of stars swarming around the dark object at the centre of our galaxy; black holes performing gravitational waltzes with normal stars; the cymbal clash of two black holes colliding, releasing ripples in spacetime. Einstein's Monsters is the incredible story of one of the most enigmatic entities in nature.

For America's native peoples, Fabian writes, the sky is a daily - and nightly - influence on their society and culture. In a comprehensive study of a lowland South American people's astronomy, he explains how the Bororo Indians of Brazil integrate the social, natural and cosmic dimensions of time and space into their environment. Fabian introduces the Bororo by recounting a newly collected version of their birdnester myth that alludes to the spatial dimensions that govern Bororo village organization. Time is mapped onto the circular village structure, astronomical observations plot the nature and location of daily activities, and the perimeter of the settlement is synchronized with circadian and seasonal cycles. The village itself acts as a retrieval and classification system that functions much as lists or tables would in a literate society. By using extensive cross-cultural materials and a holistic approach that emphasizes relationships rather than objects, Fabian lets the Bororo speak for themselves. His interpretive work combines myth and folklore with personal interviews, archival research, and discussion of his own participation in ceremonies and secular activities during the ten-month period he and his wife lived among the Bororo. Of interest to anthropologists, folklorists, ethnoastronomers, and students of religion, ""Space-time of the Bororo of Brazil"" shows that the Bororo animate a complex, rational system, a realization, Fabian writes, ""that must both broaden and deepen our understanding, appreciation and respect for all native societies"".

Ragnarok. Armageddon. Doomsday. Since the dawn of time, man has wondered how the world would end. In The Last Three Minutes, Paul Davies reveals the latest theories. It might end in a whimper, slowly scattering into the infinite void. Then again, it might be yanked back by its own gravity and end in a catastrophic "Big Crunch." There are other, more frightening possibilities. We may be seconds away from doom at this very moment. Written in clear language that makes the cutting-edge science of quarks, neutrinos, wormholes, and metaverses accessible to the layman, The Last Three Minutes treats readers to a wide range of conjectures about the ultimate fate of the universe. Along the way, it takes the occasional divergent path to discuss some slightly less cataclysmic topics such as galactic colonization, what would happen if the Earth were struck by the comet Swift-Tuttle (a distinct possibility), the effects of falling in a black hole, and how to create a "baby universe." Wonderfully morbid to the core, this is one of the most original science books to come along in years.

On July 16, 1994 a world-shattering event occurred that would rivet our attention for six explosive days and go on to make history as the single most important celestial event of the century. Comet Shoemaker-Levy 9 crashed into Jupiter, changing forever our understanding of comets and cosmic cataclysms. Our own sense of security would never be the same as the world witnessed fragment after fragment of the comet bash into Jupiter with the collective equivalent force of a 50-million-megaton bomb. David Levy, co-discoverer of periodic Comet Shoemaker-Levy 9, shares his once-in-several-lifetimes' story from the time of the discovery, with Eugene and Carolyn Shoemaker, of this unusual "squashed" comet to the later shocking revelation of hearing that "their" comet was destined to collide with Jupiter. Never in recorded history has a comet created such a catastrophic event as smashing into a planet. Impact Jupiter takes off where David Levy's earlier acclaimed book, The Quest for Comets, left us. Magnificent photos of the impacts, including superb color pictures, accompany David's poetic words, vividly bringing to life his thrilling story. Savor the words of one of the world's most celebrated amateur astronomers as he humbly and eloquently opens the beauty of the heavens to all who are curious.

We've all asked ourselves the question. It's impossible to look up at the stars and NOT think about it: Are we alone in the universe? Books, movies and television shows proliferate that attempt to answer this question and explore it. In OUT THERE Space.com senior writer Dr. Michael Wall treats that question as merely the beginning, touching off a wild ride of exploration into the final frontier. He considers, for instance, the myriad of questions that would arise once we do discover life beyond Earth (an eventuality which, top NASA officials told Wall, is only drawing closer). What would the first aliens we meet look like? Would they be little green men or mere microbes? Would they be found on a planet in our own solar system or orbiting a star far, far away? Would they intend to harm us, and if so, how might they do it? And might they already have visited? OUT THERE is arranged in a simple question-and-answer format. The answers are delivered in Dr. Wall's informal but informative style, which mixes in a healthy dose of humor and pop culture to make big ideas easier to swallow. Dr. Wall covers questions far beyond alien life, venturing into astronomy, physics, and the practical realities of what long-term life might be like for we mere humans in outer space, such as the idea of lunar colonies, and even economic implications. Readers won't just be hearing from Dr. Wall. As a longtime science journalist--whose work at Space.com is syndicated in outlets from Scientific American to Fox News--he has assembled an impressive array of contacts to provide expert commentary. From a former NASA chief scientist to leading science educators like Neil DeGrasse Tyson and Bill Nye to would-be space traveler Elon Musk, Dr. Wall shares the insights of some of the leading lights in space exploration today, and shows how the next space age might be brighter than ever.

This volume provides a comprehensive and coherent introduction to modern quantum cosmology - the study of the universe as a whole according to the laws of quantum mechanics. In particular, it presents a useful survey of the many profound consequences of supersymmetry (supergravity) in quantum cosmology. After a general introduction to quantum cosmology, the reader is led through Hamiltonian supergravity and canonical quantization and quantum amplitudes through to models of supersymmetric mini superspace and quantum wormholes. The book is rounded off with a look at exciting further developments, including the possible finiteness of supergravity. Ample introductory material is included, ensuring this topical volume is well suited as a graduate text. Researchers in theoretical and mathematical physics, applied maths and cosmology will also find it of immediate interest.

From H.G. Wells to Star Trek, audiences have been captivated by the notions of time travel, time warps, space warps, and wornholes. But science fiction is not the only realm where these concepts thrive. An active group of general relativists and quantum field theorists has produced a considerable body of serious (thought admittedly speculative) mathematical and physical analyses of the wormhole system. Now, with this fascinating book, readers can explore in depth the science behind the science fiction. Drawing on pivotal work by Einstein, Wheeler, Morris, Thorne, Hawking, and others, Matt Visser charts the development and current state of Lorentzian wormhole physics. Dr. Visser shows that by pushing established physical theories to their limits, it is possible to deduce the physical properties of such exotica as wormholes and time travel. The physical framework he uses is derived from one of the major research frontiers of modern theoretical physics: quantum gravity-the intersection of classical Einstein gravity and quantum field theory. Physicists, students of general relativity, cosmology, quantum physics, or any interested reader with a background in physics wil find this a provocative introduction to an exciting and active topic of ongoing research.

Where did we come from? Before there was life there had to be something to live on - a planet, a solar system. During the past 200 years, astronomers and geologists have developed and tested several different theories about the origin of the solar system and the nature of the Earth. Did the Earth and other planets form as a by-product of a natural process that formed the Sun? Did the solar system come into being as the result of catastrophic encounter of two stars? Is the inside of the Earth solid, liquid or gaseous? The three volumes that make up A History of Modern Planetary Physics present a survey of these theories. Nebulous Earth follows the development of the nineteenth-century's most popular explanation for the origin of the solar system, Laplace's Nebular Hypothesis. This theory supposes that a flattened mass of gas extending beyond Neptune's orbit cooled and shrank, throwing off in the process successive rings that in time coalesced to form several planets.

An internationally known scientist explains in a new and convincing theory why most life on earth, including the dinosaurs, perished 65 million years ago. The book is written in an accessible manner with personal anecdotes and wit and without scientific jargon.

Where did we come from? Before there was life there had to be something to live on - a planet, a solar system. During the past 200 years, astronomers and geologists have developed and tested several different theories about the origin of the solar system and the nature of the Earth. The three volumes that together make up A History of Modern Planetary Physics present a survey of these theories. The age of the Earth has been one of the most disputed numbers in science since the seventeenth century. Transmuted Past follows the development of theories of stellar evolution and nucleosynthesis in the twentieth century and describes radiometric methods for estimating the age of the Earth. Professor Brush also offers perspectives on the changing reputation of planetary science relative to the 'pure' sciences, such as physics, and a comparison of history and geology as ways of studying the past.