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Why the force that keeps our feet on the ground holds the key to understanding the nature of time and the origin of the universe. Gravity is the weakest force in the everyday world yet it is the strongest force in the universe. It was the first force to be recognized and described yet it is the least understood. It is a "force" that keeps your feet on the ground yet no such force actually exists. Gravity, to steal the words of Winston Churchill, is "a riddle, wrapped in a mystery, inside an enigma." And penetrating that enigma promises to answer the biggest questions in science: what is space? What is time? What is the universe? And where did it all come from? Award-winning writer Marcus Chown takes us on an unforgettable journey from the recognition of the "force" of gravity in 1666 to the discovery of gravitational waves in 2015. And, as we stand on the brink of a seismic revolution in our worldview, he brings us up to speed on the greatest challenge ever to confront physics.
This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1934.
This book invites the reader to understand our Universe, not just marvel at it. From the clock-like motions of the planets to the catastrophic collapse of a star into a black hole, gravity controls the Universe. Gravity is central to modern physics, helping to answer the deepest questions about the nature of time, the origin of the Universe and the unification of the forces of nature. Linking key experiments and observations through careful physical reasoning, the author builds the reader's insight step-by-step from simple but profound facts about gravity on Earth to the frontiers of research. Topics covered include the nature of stars and galaxies, the mysteries of dark matter and dark energy, black holes, gravitational waves, inflation and the Big Bang. Suitable for general readers and for undergraduate courses, the treatment uses only high-school level mathematics, supplemented by optional computer programs, to explain the laws of physics governing gravity.
Gravity in our myths -- Gravity in motion -- Gravity as a fiction -- Gravity as a fact -- Gravity as an equal -- Gravity in excelsis -- Gravity in our bones.
“This impassioned book invites readers to the deep end of life where authentic soul work and human transformation become pressing concerns.” —Publishers Weekly 2019 Independent Publisher Book Awards Gold Medalist in the Aging/Death & Dying Category From bestselling author Parker J. Palmer comes a brave and beautiful book for all who want to age reflectively, seeking new insights and life-giving ways to engage in the world. “Age itself,” he says, “is no excuse to wade in the shallows. It’s a reason to dive deep and take creative risks.” Looking back on eight decades of life—and on his work as a writer, teacher, and activist—Palmer explores what he’s learning about self and world, inviting readers to explore their own experience. In prose and poetry—and three downloadable songs written for the book by the gifted Carrie Newcomer—he meditates on the meanings of life, past, present, and future. With compassion and chutzpah, gravitas and levity, Palmer writes about cultivating a vital inner and outer life, finding meaning in suffering and joy, and forming friendships across the generations that bring new life to young and old alike. “This book is a companion for not merely surviving a fractured world, but embodying—like Parker—the fiercely honest and gracious wholeness that is ours to claim at every stage of life.” —Krista Tippett, New York Times-bestselling author of Becoming Wise “A wondrously rich mix of reality and possibility, comfort and story, helpful counsel and poetry, in the voice of a friend . . . This is a book of immense gratitude, consolation, and praise.” —Naomi Shihab Nye, National Book Award finalist
A ball drops to the ground. Leaves fall from a tree. Gravity is at work all around you. But what exactly is gravity? And how does it affect different objects? Read this book to find out! Learn all about matter, energy, and forces in the Exploring Physical Science series—part of the Lightning Bolt BooksTM collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt BooksTM bring nonfiction topics to life!
How can something that grounds us and keeps us here on this earth be so invisible and mysterious? We’re not talking about anything abstract and undetectable. We’re talking about GRAVITY! Gravity is a force that affects everyone and everything. Gravity is something we can easily understand, even kids, especially if they have the right tools to teach them. Explore Gravity! With 25 Great Projects will introduce kids ages 6-9 to the basics of gravity, including concepts of matter, attraction, and gravitational pull. Projects include creating a working model of a scale to learn what “weight” really means and how it’s affected by gravity. By playing with various weights to make a marvelous mobile, readers learn about the center of balance and how martial artists use this knowledge to throw their weight around. All the projects in this book are easy to follow, require little adult supervision, and use commonly found household products, many from the recycling box! The fun facts, trivia, jokes, comics, and hands-on activities will help kids discover the captivating science of gravity. Furthermore, the informational text and hands-on activities will excite kids about STEM, the interrelated fields of science, technology, engineering, and math.
Spacetime physics -- Physics in flat spacetime -- The mathematics of curved spacetime -- Einstein's geometric theory of gravity -- Relativistic stars -- The universe -- Gravitational collapse and black holes -- Gravitational waves -- Experimental tests of general relativity -- Frontiers
Gravity is a force that pulls objects toward the earth. We cannot feel gravity. But it affects everything on the planet. Because of gravity we can walk. Apples fall off trees. Let's find out more about the invisible force of gravity.
The Final Theory of Everything, revised and updated in May 2024, reveals for the first time a new ‘theory of everything’ to explain how all aspects of the universe are linked together, and why the universe is the way it is. The holy grail of cosmologists has been to find a master theory that provides a singular, all-encompassing, coherent theoretical framework of physics that fully explains and links together all aspects of the universe. This book reveals precisely that: a grand unification theory that brings together the four forces of nature (gravity, electromagnetism, weak and strong forces) into one single force. Along the way, many spurious concepts and misconceptions about the Universe are busted wide open, made possible by the Final Theory of Everything. For example, the book reveals why dark energy and dark matter are non-existent and unnecessary in the universe. Other mysteries are resolved such as what keeps galaxies together, what’s at the bottom of black holes, and exactly what causes gravity. A special section on the true nature of light reveals how it will be possible one day to put virtual video cameras on the surfaces of planets and stars. This will give us instant movie-like videos of far away planets and stars with no time delays. A technology that is destined to revolutionise mankind's exploration of the cosmos and the hunt for extraterrestrial life. This book is written for a general audience and for scientists & physicists - for anybody wanting to know more about our astonishing Universe and the world we inhabit.