This book is for anyone who wants to be able to connect the history of lunar exploration to the Moon visible above. It addresses what Apollo equipment and experiments were left behind and what the Apollo landings sites look like now. Each Apollo mission is examined in detail, with photos that progressively zoom-in to guide the reader in locating the Apollo landing sites. Guided by official NASA photographs from the Lunar Reconnaissance Orbiter and the original Apollo missions, the reader can view the Moon with a new appreciation of the accomplishment of landing astronauts on its surface. Countless people have gazed at the Moon in the night sky knowing the successes of the Apollo Program in landing men on the Moon. After the information in this guide, casual and serious observers can actually point out where the Apollo landings occurred as well as knowing why those sites were chosen.

Like everyone else, most amateur astronomers live busy lives. After a long day or work or looking after young children, the last thing you want as an observer is to have to lug out a large telescope and spend an hour getting it ready before it can be used. Maybe you are going on vacation somewhere in the countryside where there are sure to be dark skies, but you don't necessarily want astronomy to dominate the trip. Or suppose you are not quite committed to owning a large telescope, but curious enough to see what a smaller, portable setup can accomplish. These are times when a small "grab 'n' go" telescope, or even a pair of binoculars, is the ideal instrument. And this book can guide you in choosing and best utilizing that equipment. What makes a telescope fall into the "grab 'n' go" category? That's easy - speed of setting up, ease of use, and above all, portability. In Part I of this book, we survey the various types of equipment, including accessories and mounts, that are available, and what it is best for what kind of viewing. Part II is about using your grab 'n' go telescope to visit a wealth and wide variety of objects. There are chapters on solar, lunar and planetary observing, as well as descriptions of many deep sky objects, including double and variable stars, planetary, emission and reflection nebulae, open and globular clusters and distant galaxies. This ambitious text is dedicated to those who love to or - because of their limited time - must observe the sky at a moment's notice, whether from the comfort of a backyard or while on business or vacation far from home. Everything you need to know is here. So get started!.

Top ten Sunday Times Bestseller 'Engaging, ambitious and creative' Guardian Where are we? Are we alone? Who are we? Why are we here? What is our future? Human Universe tackles some of the greatest questions that humans have asked to try and understand the very nature of ourselves and the Universe in which we live. Through the endless leaps of human minds, it explores the extraordinary depth of our knowledge today and where our curiosity may lead us in the future. With groundbreaking insight it reveals how time, physics and chemistry came together to create a creature that can wonder at its own existence, blessed with an unquenchable thirst to discover not just where it came from, but how it can think, where it is going and if it is alone. Accompanies the acclaimed BBC TV series.

Michel van Pelt explains for the first time the principle of space tethers: what they are and how they can be used in space. He introduces non-technical space enthusiasts to the various possibilities and feasibility of space tethers including the technological challenges and potential benefits. He illustrates how, because of their inherent simplicity, space tethers have the potential to make space travel much cheaper, while ongoing advances in tether material technology may make even seemingly far-fetched ideas a reality in the not too distant future.

Amateur astronomers interested in learning more about astronomical spectroscopy now have the guide they need. It provides detailed information about how to get started inexpensively with low-resolution spectroscopy, and then how to move on to more advanced high-resolution spectroscopy. Uniquely, the instructions concentrate very much on the practical aspects of using commercially-available spectroscopes, rather than simply explaining how spectroscopes work. The book includes a clear explanation of the laboratory theory behind astronomical spectrographs, and goes on to extensively cover the practical application of astronomical spectroscopy in detail. Four popular and reasonably-priced commercially available diffraction grating spectrographs are used as examples. The first is a low-resolution transmission diffraction grating, the Star Analyser spectrograph. The second is an inexpensive fiber optic coupled bench spectrograph that can be used to learn more about spectroscopy. The third is a newcomer, the ALPY 600 spectrograph. The fourth spectrograph considered is at the other end of the market both in performance and cost, the high-resolution Lhires III. While considerably more expensive, this is a popular and excellent scientific instrument, that allows more advanced amateur astronomers to produce scientifically valuable data. With all of these tools in place, the amateur astronomer is well-prepared to forger deeper into the night sky using spectroscopy.

'A gripping exploration of one of the most fundamental, but also perplexing aspects of existence.' PROF. LEWIS DARTNELL, author of Origins 'Such an enjoyable read...full of delightful nuggets that you will want to impress your friends and family with.' PROF. JIM AL-KHALILI, NYT bestselling author of The World According to Physics 'This is a lovely, fascinating book. It blends history, geology, chemistry, philosophy and, of course, physics in a way that's delightful to read.' - ABIGAIL BEALL, author of The Art of Urban Astronomy -------- Discover the secrets of one of the biggest puzzles in our history - Time. As a subject, it has perplexed and fascinated generations of scientists, historians and more, and continues to spark the most intriguing questions being asked in science today. Can time be stopped? Is time travel possible? Does time even exist...? In these ten bite-sized essays, Colin Stuart delves into these big questions and uncovers the most awe-inspiring and revealing things we should all know about time. Perfect for readers of Carlo Rovelli and anyone fascinated by space and the universe, this is a must-read for those short on time, but not curiosity.

Ice and Fire: Great Comets to Comewas written because a special celestial event climaxes towards the end of 2013 the arrival, fresh from the Oort Cloud, of Comet C/2012 S1 (ISON). By all predictions even the most pessimistic ones this comet is set to be one of, perhaps the most, dazzling comet seen in modern history and has the astronomical world buzzing with anticipation.

Skywatchers have already been primed for C/2012 (ISON) earlier in 2013 with the apparition of another naked-eye comet, C/2011 L4 (PanSTARRS), and following C/2012 S1 (ISON) there is the prospect of 2012 K1 (PanSTARRS) reaching naked eye visibility in August 2014. Future bright cometary prospects are also discussed, taking into account the latest predictions.

Examining the origin and nature of comets using examples of great cometsfrom the past, this book sets the scene for the arrival of Comet C/2012 S1 and those following it over the next few years in the inner Solar System.Skywatchers and amateur astronomers can learn how to follow, observe and record comets. There is also a guide on how to keep abreast of the latest cometary discoveries and how to use a variety of reputable sources, including publications, websites, programs and apps to visualize and plan observations.The role of the amateur in cometary discovery also is featured, as well as details on how professional astronomers plan to get the most science out of cometary apparitions, how and why professionals go about discovering comets, and upcoming plans to visit comets with space probes (and later, perhaps, human visits).Illustrations provide historic images of comets, images from space probes and images of the latest bright comets. Orbital plots and easy-to-follow sky charts are also included.

This book is a unique guide that sets the scene by giving a comprehensive history of comets and examples of great comets throughout history and informs the reader about the nature and origins of this spectacular occurence.Expectations are fully covered by explaining not only what the regular person can expect to see, but how amateur astronomers can plan observations and what steps the professionals are taking to get the most science from this exciting event."

Incoming Asteroid is based on a project within ASTRA (the Association in Scotland to Research into Astronautics) to provide scientific answers to the question what would we do if we knew there was going to be an asteroid impact in ten years time or less?
Clearly there are many things humanity can do nothing about, for example an unseen object traveling towards us so fast that we have no time to prepare, or an object so large it may be unstoppable. A realistic hazard model was decided upon, and the scenario developed from that: an incoming object about 1 kilometer in diameter, in an orbit ranging from the outer rim of the Asteroid Belt to within that of Earth s.
Three basic possibilities are considered in this book. The first is the deflection of the asteroid, using remote probes along with a number of possible technologies to change the asteroid s course. Second is the attempt of a manned mission, in order to plant a propulsion system on the asteroid to push it into a different orbit. Third is the nuclear option, a last-ditch attempt to break up and then disperse the asteroid using nuclear weapons. (A rather impractical combination of these second and third options were used as the plot of the popular 1998 Bruce Willis feature film, Armageddon.)
Although the cost of developing the technology needed to protect the Earth would be substantial, there would certainly be spin-off benefits. These could eventually result in practical small-scale atomic energy sources, new propulsion systems that could make extraterrestrial mining within the solar system a possibility, and other as-yet unforeseen benefits.

And finally, Incoming Asteroid considers the political implications - how governments across the world should best react to the threat with a view to minimizing loss of life, and in the weeks running up to the possible impact, preventing panic in the population."

To the naked eye, the most evident defining feature of the planets is their motion across the night sky. It was this motion that allowed ancient civilizations to single them out as different from fixed stars. "The Observer's Guide to Planetary Motion" takes each planet and its moons (if it has them) in turn and describes how the geometry of the Solar System gives rise to its observed motions. Although the motions of the planets may be described as simple elliptical orbits around the Sun, we have to observe them from a particular vantage point: the Earth, which spins daily on its axis and circles around the Sun each year. The motions of the planets as observed relative to this spinning observatory take on more complicated patterns. Periodically, objects become prominent in the night sky for a few weeks or months, while at other times they pass too close to the Sun to be observed. "The Observer's Guide to Planetary Motion" provides accurate tables of the best time for observing each planet, together with other notable events in their orbits, helping amateur astronomers plan when and what to observe. Uniquely each of the chapters includes extensive explanatory text, relating the events listed to the physical geometry of the Solar System. Along the way, many questions are answered: Why does Mars take over two years between apparitions (the times when it is visible from Earth) in the night sky, while Uranus and Neptune take almost exactly a year? Why do planets appear higher in the night sky when they're visible in the winter months? Why do Saturn's rings appear to open and close every 15 years? This book places seemingly disparate astronomical events into an understandable three-dimensional structure, enabling an appreciation that, for example, very good apparitions of Mars come around roughly every 15 years and that those in 2018 and 2035 will be nearly as good as that seen in 2003. Events are listed for the time period 2010-2030 and in the case of rarer events (such as eclipses and apparitions of Mars) even longer time periods are covered. A short closing chapter describes the seasonal appearance of deep sky objects, which follow an annual cycle as a result of Earth's orbital motion around the Sun.

This modern presentation guides readers through the theory and practice of satellite orbit prediction and determination. Starting from the basic principles of orbital mechanics, it covers elaborate force models as well as precise methods of satellite tracking. The accompanying CD-ROM includes source code in C++ and relevant data files for applications. The result is a powerful and unique spaceflight dynamics library, which allows users to easily create software extensions. An extensive collection of frequently updated Internet resources is provided through WWW hyperlinks.

It has been nearly 100 years since the Apollo moon landings, when Jack and Vladimir, two astronauts on a mission to Venus, discover a mysterious void related to indigenous life on the planet. Subsequently more voids are detected on Earth, Mars, Titan, and, quite ominously, inside a planetoid emerging from the Kuiper belt.

Jack is sent to investigate the voids in the Solar System and intercept the planetoid - which, as becomes increasingly clear, is inhabited by alien life forms. Jack and his crew will have little time to understand their alien biochemistry, abilities, behavior patterns, resilience, and technology, but also how these life forms relate to the voids.

Humankind's first encounter with these exotic life forms couldn't be more fateful, becoming a race against time to save life on Earth and to reveal the true nature of the voids, which seem to be intrinsically related to life and the universe itself. In this novel, the author combines many topics related to state-of-the-art research in the field of astrobiology with fictional elements to produce a thrilling page turner.

This new version significantly develops the astrobiological denouement of the plot and features an extensive non-technical appendix where the underlying science is presented and discussed.

From the reviews of the first edition ("Voids of Eternity: Alien Encounter")

Here's a thrilling yarn in the best "hard SF" tradition of Asimov, James Hogan, and Ben Bova, written by a scientist who knows all about the possibilities of life in the solar system and beyond. Dirk Schulze-Makuch weaves into his book all the astrobiological themes he's worked on in recent years -- speculation about creatures in the atmosphere of Venus and on and under the surface of Mars and Titan -- together with some well-informed Eastern philosophy and a cracking good space battle. A great first novel from a rising talent. Highly recommended. David Darling, on amazon.com, 2009The research interests of Dr. Schulze-Makuch, currently a professor at Washington State University, focus on evolutionary adaptation strategies of organisms in their natural environment, particularly extreme environments such as found on other planetary bodies. Dirk Schulze-Makuch is best known for his publications on extraterrestrial life, being coauthor of three books on the topic: "We Are Not Alone: Why We Have Already Found Extraterrestrial Life" (2010), "Cosmic Biology: How Life could Evolve on Other Worlds" (2010), and "Life in the Universe: Expectations and Constraints" (2004). In 2011 he published with Paul Davies "A One Way Mission to Mars: Colonizing the Red Planet" and in 2012 with David Darling "Megacatastrophes Nine Strange Ways the World Could End."

The beginning astronomical observer passes through a series of stages. The initial stage is hugely exciting and gives the beginner a real buzz as he discovers some of the faint fuzzy objects, markings on the planets, rings around Saturn and the craters on the Moon. But as the novice observer progresses, he or she wants to know what more there is than looking at faint fuzzy blobs or indistinct planet markings. Many jump to the conclusion - wrongly - that they need to spend lots of money on expensive equipment to progress. "From Casual Stargazer to Amateur Astronomer" has been written specifically to address this group of budding stargazers. Astronomy is much more than a quick sightseeing tour. Patient observers who can develop their skills will start to appreciate what they are seeing, and will know exactly what to look out for on any particular night. And equally important, they will learn what not to expect to see. "From Casual Stargazer to Amateur Astronomer" is for those who want to develop observing skills beyond mere sightseeing, and learn some of the techniques used to carry out enjoyable - and scientifically useful - observations. It will also direct readers to make informed choices about what can be seen and when. This book is for anyone keen to develop their skills as an amateur astronomer.

Amateur astronomers of all skill levels are always contemplating their next telescope, and this book points the way to the most suitable instruments. Similarly, those who are buying their first telescopes and these days not necessarily a low-cost one will be able to compare and contrast different types and manufacturers. This exciting and revised new guide provides an extensive overview of binoculars and telescopes. It includes detailed up-to-date information on sources, selection and use of virtually every major type, brand, and model on today s market, a truly invaluable treasure-trove of information and helpful advice for all amateur astronomers.

Originally written in 2006, much of the first edition is inevitably now out of date, as equipment advances and manufacturers come and go. This second edition not only updates all the existing sections of A Buyer s and User s Guide to Astronomical Telescopes and Binoculars but adds two new ones: Astro-imaging and Professional-Amateur collaboration. Thanks to the rapid and amazing developments that have been made in digital cameras not those specialist cool-chip astronomical cameras, not even DSLRs, but regular general-purpose vacation cameras it is easily possible to image all sorts of astronomical objects and fields. Technical developments, including the Internet, have alsomade it possible for amateur astronomers to make a real contribution to science by working with professionals.

Selecting the right device for a variety of purposes can be an overwhelming task in a market crowded with observing options, but this comprehensive guide clarifies the process. Anyone planning to purchase binoculars or telescopes for astronomy whether as a first instrument or as an upgrade to the next level will find this book a treasure-trove of information and advice.It also suppliesthe reader with many usefulhints and tips on using astronomical telescopes or binoculars to get the best possible results from your purchase."

The story behind the elite scientists, technologists, SF enthusiasts, and billionaires who believe that humanity's destiny is to populate the stars . . . Does humanity have a destiny "in the stars?" Should a species triggering massive extinctions on its own planet instead stay put? This new book traces the waxing and waning of interest in space settlement through the decades, and offers a journalistic tour through the influential subculture attempting to shape a multiplanetary future. What motivates figures such as billionaires Elon Musk and Yuri Milner? How important have science fiction authors and filmmakers been in stirring enthusiasm for actual space exploration and settlement? Is there a coherent motivating philosophy and ethic behind the spacefaring dream? Star Settlers offers both a historical perspective and a journalistic window into a peculiar subculture packed with members of the scientific, intellectual, and economic elite. This timely work captures the extra-scientific zeal for space travel and settlement, places it in its historical context, and tackles the somewhat surreal conceptions underlying the enterprise and prognoses for its future.

This book takes the reader on an exploration of the structure and evolution of our universe. The basis for our knowledge is the Big Bang theory of the expanding universe. This book then tells the story of our search for the first stars and galaxies using current and planned telescopes. These telescopes are marvels of technology far removed from Galileo's first telescope but continuing astronomy in his ground breaking spirit. We show the reader how these first stars and galaxies shaped the universe we see today. This story is one of the great scientific adventures of all time.

To British television viewers, the name 'Patrick Moore' has been synonymous with Astronomy and Space Travel since he first appeared on The Sky at Night in 1957. To amateur astronomers he has been a source of inspiration, joy, humour and even an eccentric role model since that time. Most people know that his 55 years of presenting The Sky at Night is a world record, but what was he really like in person? What did he do away from the TV cameras, in his observatory, and within the British Astronomical Association, the organisation that inspired him as a youngster? Also, precisely what did he do during the War Years, a subject that has always been shrouded in mystery? Martin Mobberley, a friend of Patrick Moore's for 30 years, and a former President of the British Astronomical Association, has spent ten years exhaustively researching Patrick's real life away from the TV cameras. His childhood, RAF service, tireless voluntary work for astronomy and charity and his endless book writing are all examined in detail. His astronomical observations are also examined in unprecedented detail, along with the battles he fought along the way and his hatred of bureaucracy and political correctness. No fan of Sir Patrick Moore can possibly live without this work on their bookshelf!

Stargazing is among the most peaceful and inspiring outdoor activities. Night Sky, the award-winning book by Jonathan Poppele, makes it more fun than ever! Take a simple approach to finding 62 constellations by focusing on one constellation at a time, instead of attempting to study dizzying charts. Start with the easy-to-find constellations during each season and work toward the more difficult ones. Better yet, you'll learn how to locate any constellation in relation to the Big Dipper, the North Star, and the top of the sky. With two ways to locate each constellation, you'll know where in the sky to look and what to look for! Along the way, you'll be introduced to mythology, facts, and tidbits, as well as details about the planets, solar system, and more! As an added bonus, the book comes with a red-light flashlight for night reading.

What happens at the end of the life of massive stars? At one time we thought all these stars followed similar evolutionary paths. However, new discoveries have shown that things are not quite that simple. This book focuses on the extreme -the most intense, brilliant and peculiar- of astronomical explosions. It features highly significant observational finds that push the frontiers of astronomy and astrophysics, particularly as before these objects were only predicted in theory. This book is for those who want the latest information and ideas about the most dramatic and unusual explosions detected by current supernova searches. It examines and explains cataclysmic and unusual events in stellar astrophysics and presents them in a non-mathematical but highly detailed way that non-professionals can understand and enjoy.

Amateur astronomers of all expertise from beginner to experienced will find this a thorough star cluster atlas perfect for easy use at the telescope or through binoculars. It enables practical observers to locate the approximate positions of objects in the sky, organized by constellation. This book was specifically designed as an atlas and written for easy use in field conditions. The maps are in black-and-white so that they can be read by the light of a red LED observer's reading light. The clusters and their names/numbers are printed in bold black, against a "grayed-out" background of stars and constellation figures. To be used as a self-contained reference, the book provides the reader with detailed and up-to-date coverage of objects visible with small-, medium-, and large-aperture telescopes, and is equally useful for simple and computer-controlled telescopes. In practice, GO-TO telescopes can usually locate clusters accurately enough to be seen in a low-magnification eyepiece, but this of course first requires that the observer knows what is visible in the sky at a given time and from a given location, so as to input a locatable object. This is where "The Observer's Guide to Star Clusters" steps in as an essential aid to finding star clusters to observe and an essential piece of equipment for all amateur astronomers.

With the advent of CCDs and webcams, the focus of amateur astronomy has to some extent shifted from science to art. Visual work in astronomy has a rich history. Today, imaging is now more prominent. However there is still much for the visual amateur astronomer to do, and visual work is still a valid component of amateur astronomy. Paul Abel has been addressing this issue by promoting visual astronomy wherever possible - at talks to astronomical societies, in articles for popular science magazines, and on BBC TV's The Sky at Night. Visual Lunar and Planetary Astronomy is a comprehensive modern treatment of visual lunar and planetary astronomy, showing that even in the age of space telescopes and interplanetary probes it is still possible to contribute scientifically with no more than a moderately-priced commercially made astronomical telescope. It is believed that imaging and photography is somehow more objective and more accurate than the eye, and this has led to a peculiar "crisis of faith" in the human visual system and its amazing processing power. But by analyzing observations from the past, we can see how accurate visual astronomy really is! Measuring the rotational period of Mars and making accurate lunar charts for American astronauts were all done by eye. The book includes sections on how the human visual system works, how to view an object through an eyepiece, and how to record observations and keep a scientific notebook. The book also looks at how to make an astronomical, rather than an artistic, drawing. Finally, everything here will also be of interest to those imagers who wish to make their images more scientifically applicable by combining the methods and practices of visual astronomy with imaging.

"Twenty-Five Astronomical Observations That Changed the World" takes twenty-five journeys through space, back in time and into human history. We begin with the simplest sight of the Tycho Crater on the Moon, through a repeat of Galileo's observations of Jupiter's moons, and then move out towards the nebulae, stars, and galaxies. The astronomical observations repeat the original groundbreaking discoveries that have changed our understanding of science and ourselves. This title contains graded observing challenges from the straightforward to the more difficult (in chapter order). It offers clear observing tips and lots of practical help, presuming no prior in-depth knowledge of equipment. Binoculars and/or a small astronomical telescope are all that is required for most of the observations. Secondly, it explores for each observation the science of what is seen, adding to the knowledge and enjoyment of amateur astronomers and offering lots of reading for the cloudy nights when there is not a star in view. Thirdly, the book puts the amateur astronomers' observations into a wider perspective. "Twenty-Five Astronomical Observations That Changed the World" makes the observer part of that great story of discovery. Each chapter, each observing challenge, shows how to observe and then how to look with understanding. The projects begin with practicalities: where the object is, how best is it observed and with what appropriate equipment (usually a small-to-medium aperture amateur telescope, binoculars, even the naked eye). "Twenty-Five Astronomical Observations that Changed the World" guides even the inexperienced amateur astronomer - beginners can use the book - around a variety of night-sky objects, and reminds the more experienced how they can best be seen. These practical observations put us in contact with all the history and culture surrounding them: through scientific speculation and literature to those first fuzzy images made in 1959 by the Russian space probe Luna 3.

That's one small step for man... The Moon has always fascinated humans, and thoughts on how to get there occupied minds for hundreds of years. During the space race, setting foot on the Moon was the ultimate goal and the Apollo missions to the Moon are amongst the most successful and well-remembered manned space flights that NASA ever accomplished. In Project Apollo Norman Ferguson reveals fascinating facts and figures, and recounts amazing stories about the astronauts and their spacecraft, and how they made the giant leap for mankind.

"Weird Worlds" is the third book in David Seargent's "Weird" series. This book assumes a basic level of astronomical understanding and concentrates on the "odd and interesting" aspects of planetary bodies, including asteroids and moons. From our viewpoint here on Earth, this work features the most unusual features of these worlds and the ways in which they appear "weird" to us. Within our own Solar System, odd facts such as the apparent reversal of the Sun in the skies of Mercury, CO2-driven fountains of dust on Mars, possible liquid water (and perhaps primitive life!) deep within the dwarf planet Ceres, and a variety of odd facts about the planetary moons are all discussed. A special chapter is devoted to Saturn's giant moon Titan, and its methane-based weather system and "hydrological" cycle. This chapter also includes recent speculation on the possibility of methane-based organisms and the form that these might take, if they really do exist. Beyond our Solar System, the book looks at the range of worlds discovered and hypothesized. In "Weird Worlds," the author discusses planets where temperatures are so high that it rains molten iron, and others so cold that liquid methane floods across plains of ice! Worlds are described where the lightest element acts like a metal and where winds blow at thousands of miles per hour - as well as possible planets whose orbits are essentially parabolic. In keeping with previous titles in David Seargent's "Weird" series, "Weird Worlds" contains several projects that astronomers of all levels can undertake.

The indispensable guide to the night sky--now in a newly updated and expanded edition In this newly updated and expanded edition of their classic work, Ian Ridpath and Wil Tirion illuminate the night sky as never before, providing novice stargazers and professional astronomers alike with the most informative, user-friendly, comprehensive, and authoritative celestial field guide available. The product of a thirty-year collaboration between one of the world's leading astronomy writers and the world's foremost celestial mapmaker, Stars and Planets features superb color sky charts, diagrams, or photographs on almost every page; clear and engaging writing; a spacious and attractive design; and a compact size. This updated edition features the latest information on stars, a revised section on planets that incorporates recent research on exoplanets, and some revised charts and new photographs. Simply put, Stars and Planets is indispensable. Don't leave home--at night--without it. * Detailed charts covering all 88 constellations in the Northern and Southern hemispheres* Data and notes on all bright stars and other objects of interest* Detailed Moon maps and descriptions of the main lunar features* Tips on choosing and using binoculars and telescopes, to suit any budget* The only guide to provide annual planetary data as a downloadable online resource* Updates include the latest data on stars and exoplanets and some revised charts and new photos

Light of the Stars tells a radically new story about what we are: one world in a universe awash in planets. Building on his widely discussed scientific papers and The New York Times op-eds, astrophysicist Adam Frank shows that not only is it likely that alien civilisations have existed many times before but that many of them have driven their own worlds into dangerous eras of change. He explains how dust storms on Mars, the greenhouse effect on Venus, Gaia Theory, the threat of nuclear winter, and efforts to prove or disprove the plurality of worlds from Aristotle to Copernicus to Carl Sagan have contributed to our understanding of our place in the universe and the growing challenge of climate change. And he explores what may be the largest question of all: if there has been life on other worlds, what its presence can tell us about our own fate.