This book tells the human story of one of man's greatest intellectual adventures - how it came to be understood that light travels at a finite speed, so that when we look up at the stars, we are looking back in time. And how the search for a God-given absolute frame of reference in the universe led most improbably to Einstein's most famous equation E=mc2, which represents the energy that powers the stars and nuclear weapons. From the ancient Greeks measuring the solar system, to the theory of relativity and satellite navigation, the book takes the reader on a gripping historical journey. We learn how Galileo discovered the moons of Jupiter and used their eclipses as a global clock, allowing travellers to find their Longitude. And how Ole Roemer, noticing that the eclipses were a little late, used this to obtain the first measurement of the speed of light, which takes eight minutes to get to us from the sun. We move from the international collaborations to observe the Transits of Venus, including Cook's voyage to Australia, to the achievements of Young and Fresnel, whose discoveries eventually taught us that light travels as a wave but arrives as a particle, and all the quantum weirdness which follows. In the nineteenth century, we find Faraday and Maxwell, struggling to understand how light can propagate through the vacuum of space unless it is filled with a ghostly vortex Aether foam. We follow the brilliantly gifted experimentalists Hertz, discoverer of radio, Michelson with his search for the Aether wind, and Foucault and Fizeau with their spinning mirrors and lightbeams across the rooftops of Paris. Messaging faster than light using quantum entanglement, and the reality of the quantum world, conclude this saga.

Harvard's top astronomer takes us inside the mind-blowing story of the first interstellar visitor to our solar system.

In late 2017, scientists at a Hawaiian observatory glimpsed a strange object soaring through our inner solar system. Astrophysicist Avi Loeb conclusively showed it was not an asteroid; it was moving too fast along a strange orbit, and leaving no trail of gas or debris in its wake. There was only one conceivable explanation: the object was a piece of advanced technology created by a distant alien civilization.

In Extraterrestrial, Loeb takes readers inside the thrilling story of the first interstellar visitor to be spotted in our solar system. He outlines his theory and its profound implications: for science, for religion, and for the future of our planet. A mind-bending journey through the furthest reaches of science, space-time, and the human imagination, Extraterrestrial challenges readers to aim for the stars-and to think critically about what's out there, no matter how strange it seems.

The revised second edition of this established dictionary contains over 4,300 up-to-date entries covering all aspects of astronomy. Compiled with the help of over 20 expert contributors under the editorship of renowned author and broadcaster Ian Ridpath, A Dictionary of Astronomy covers everything from space exploration and the equipment involved, to astrophysics, cosmology, and the concept of time. The dictionary also includes biographical entries on eminent astronomers, as well as worldwide coverage of observatories and telescopes. Supplementary material is included in the appendices, such as tables of Apollo lunar landing missions and the constellations, a table of planetary data, and numerous other tables and diagrams complement the entries. The entries have been fully revised and updated for this edition, and new entries have been added to reflect the recent developments within the field of astronomy, including magnetic reconnection, Fornax cluster, luminosity density, and Akatsuki. The content is enhanced by entry-level web links, which are listed and regularly updated on a companion website. A Dictionary of Astronomy is an invaluable reference source for students, professionals, amateur astronomers, and space enthusiasts.

Meteorite tells the fascinating story of the stones from outer space scattered across our planet. From the impact that finished off the dinosaurs to the dagger made of extraterrestrial iron found in Tutankhamun's tomb, this book is packed full of surprising information, unlikely pioneers and eye-opening science. Dr Tim Gregory explains how these rocky fragments offer clues not just to the earliest origins of everything, but also to humanity's survival into the future. 'A passionate communicator, Tim Gregory conjures colourful environments and events far outside the human' NATURE 'Meticulous and eminently readable, served with clarity, erudition and humour' WALL STREET JOURNAL 'Tim Gregory gets it. He has an uncanny ability to swiftly understand, to clearly explain, and to be joyful' CHRIS HADFIELD

From a long-term planning lead for the Mars Exploration Rover Project comes this vivid insider account of some of NASA's most vital and exciting missions to the Red Planet, illustrated with full-colour photographs-a wondrous chronicle of unprecedented scientific discovery and the search for evidence of life on Mars. 'There are probably just a few of moments in human history when a small group of humans stood on the margins of a vast new world, and it is no stretch of the romantic imagination that the arrival of two rovers on the surface of another planet was surely one of them.' Human exploration of Mars is the most ambitious and exciting scientific goal of the 21st century, and few people on earth know as much about this fascinating planet as Dr Larry Crumpler. As one of the long-term planning leads for the Mars Exploration Rover Project, he helped control the daily communications between NASA and the rovers roaming the planet to gather scientific data. In this magnificent compendium, Dr. Crumpler recounts the history of the Red Planet, from the earliest days when ancient astronomers turned their eyes to the heavens to the breakthrough discoveries being unearthed by modern technology today, including some of the first images from the latest rover, Perseverance. Paired with stunning, full-colour photographs taken by rovers and NASA satellites images, this magnificent "biography" of the red planet allows us to understand and experience it as never before. When the Spirit and Opportunity Rovers landed on Mars in January 2004, scientists expected them to function for 90 days. But those three months turned into fifteen years. With data gathered by the rovers, Dr Crumpler and his team were able to reconstruct the planet's stunning geological past, when it was once inundated with water, and perhaps could have supported microbial life. Dr Crumpler also reveals the joys and demands of life as a scientist taking part in these historic missions. Exploring fundamental questions about this remarkable planet that have intrigued us earthlings for years, Red Planet Renaissance illuminates Mars' significance in the solar system-and the human imagination.

Introduction by Professor Stephen Hawking. When Edwin Hubble looked into his telescope in the 1920s, he was shocked to find that nearly all of the galaxies he could see through it were flying away from one another. If these galaxies had always been travelling, he reasoned, then they must, at some point, have been on top of one another. This discovery transformed the debate about one of the most fundamental questions of human existence - how did the universe begin? Every society has stories about the origin of the cosmos and its inhabitants, but now, with the power to peer into the early universe and deploy the knowledge gleaned from archaeology, geology, evolutionary biology and cosmology, we are closer than ever to understanding where it all came from. In The Origin of (almost) Everything, New Scientist explores the modern origin stories of everything from the Big Bang, meteorites and dark energy, to dinosaurs, civilisation, timekeeping, belly-button fluff and beyond. From how complex life evolved on Earth, to the first written language, to how humans conquered space, The Origin of (almost) Everything offers a unique history of the past, present and future of our universe.