The two most fascinating questions about extraterrestrial life are where it is found and what it is like. In particular, from our Earth-based vantage point, we are keen to know where the closest life to us is, and how similar it might be to life on our home planet. This book deals with both of these key issues. It considers possible homes for life, with a focus on Earth-like exoplanets. And it examines the possibility that life elsewhere might be similar to life here, due to the existence of parallel environments, which may result in Darwinian selection producing parallel trees of life between one planet and another. Understanding Life in the Universe provides an engaging and myth-busting overview for any reader interested in the existence and nature of extraterrestrial life, and the realistic possibility of discovering credible evidence for it in the near future.

Although space travel has been a topic of great interest to many, few have an understanding of the ultimate limits that will determine its possibilities. One thing is certain. No matter the advancement in technology, whether earthling or extraterrestrial, energy requirements will determine ultimate success in space travel. True, technology will play a part. Among other things, it will determine the kinds of fuels that will be useable in deep space travel and that will, in the end, determine its successes.
Are we ultimately going to be able to travel outside our own solar system to reach other worlds? Have extraterrestrials really visited us in the past? These are the questions addressed in this book. It is written for the layman, and does not require a technical background.

On March 21, 2013, the European Space Agency released a map of the afterglow of the Big Bang. Taking in 440 sextillion kilometres of space and 13.8 billion years of time, it is physically impossible to make a better map: we will never see the early universe in more detail. On the one hand, such a view is the apotheosis of modern cosmology, on the other, it threatens to undermine almost everything we hold cosmologically sacrosanct. The map contains anomalies that challenge our understanding of the universe. It will force us to revisit what is known and what is unknown, to construct a new model of our universe. This is the first book to address what will be an epoch-defining scientific paradigm shift. Stuart Clark will ask if Newton's famous laws of gravity need to be rewritten; if dark matter and dark energy are just celestial phantoms? Can we ever know what happened before the Big Bang? What's at the bottom of a black hole? Are there universes beyond our own? Does time exist? Are the once immutable laws of physics changing?

Professor Stephen Hawking is generally considered to have been one of the world's greatest thinkers. Here, his phenomenal bestseller A Brief History of Time is illustrated to bring his theories to life in a clear, captivating and visually engaging way. 'This book marries a child's wonder to a genius's intellect. We journey into Hawking's universe, while marvelling at his mind' - The Sunday Times 'Stephen Hawking can explain the complexities of cosmological physics with an engaging combination of clarity and wit...' - Observer 'Exceptional writing explaining the mysteries and beauty of our universe. The book is very fascinating and highly enjoyable. Highly recommended' - ***** Reader review 'This book is mind blowing' - ***** Reader review 'A masterpiece' - ***** Reader review ******************************************************************************************** Was there a beginning of time? Could time run backwards? Is the universe infinite or does it have boundaries? These are just some of the questions considered in the internationally acclaimed masterpiece by the world-renowned physicist Professor Stephen Hawking. It begins by reviewing the great theories of the cosmos from Newton to Einstein, before delving into the secrets which still lie at the heart of space and time, from the Big Bang to black holes, via spiral galaxies and strong theory. To this day A Brief History of Time remains a staple of the scientific canon, and its succinct and clear language continues to introduce millions to the universe and its wonders. In this edition, Professor Hawking explains his complex theories through a fresh visual dimension. Over 150 stunning colour illustrations have been specially commissioned for this purpose to help the reader understand what have become popular mythic images of our century, but which nonetheless remain difficult, abstract ideas to grasp. This stunning gift edition also includes a new appendix with updates to the text and tributes to Stephen Hawking.

In 1995 two Swiss astronomers discovered a planet circling a star other than our Sun. This changed our perception of the Universe forever, proving that Earth and the other celestial bodies in our Solar System are not alone in outer space. Now, after a decade of exploration, more than 860 planets have been discovered, many of which are completely unlike anything else we know. Some are blacker than coal; some are bathed in molten lava; others are perpetually scoured by hurricane-force winds; some have not one sun but two that rise in the morning, and others are perpetually drowned in global oceans. But as well as strange, inhabitable lands, there is familiarity too. Some of these alien worlds are strikingly similar to planets in our Solar System. Astronomers now know of planets just like Jupiter, Neptune, Mars and Mercury orbiting stars similar to our Sun, both nearby and deep into space. Authoritatively written and fully up to date on this fast-moving area of science, The Search for the Earth's Twin will take you on a journey through the cosmos via frozen wastelands, slow-moving globes and fiery volcanic bodies, to planets that can - and just might - sustain complex life. The prospect of discovering the Earth's twin is now tantalisingly close.

This is the first of a two-volume set that deal with the entire Milky Way. This first volume looks at what can be seen predominantly from the Northern Skies. In addition to the descriptive text, there are many star charts and maps, as well as the latest up-to-date images made by observatories around the world and in space, as well as images taken by amateur astronomers.

"And it was then that all these kinds of things thus established received their shapes from the Ordering One, through the action of Ideas of Numbers" (Plato: in Timaeus). Indeed, the Hamilton's 'Principle of Least Action' is a mathematical discrimination between inorganic and organic systems. The geometrical progression of organic life has the property of producing by simple addition, a succession of numbers or similar shapes making the homothetic (gnomonic) growth-work by 'imbibition' (from inside outwards). Whereas, inorganic matters (crystals, snowflakes, rocks) grow by 'agglutination' (from outside inwards) and final distribution of energy to cause no further motion. While in inorganic growth (hexagonal), the Principle of Least Actions tends to save energy, in organic or gnomonic growth (pentagonal) there is a tendency to save the substance. Involving the avid travelers "father jaguar and the cub," this tourbook of the "snow gallery" mathematically and geometrically analyzes the deposition, aggregation, capacitance, and velocity of the snowflake formation, vis a vis the hexagonal (honeycomb) tendency. When the tour is over, the cub classifies his most favorite snowflakes, giving them names.