Tethered To The Earth

Tethered to the Earth contains human figures in two landscapes as well as the complex emotions evoked when one is far from home. After living and teaching in Northern Wisconsin for two school years and traveling through Europe for five weeks (the summer between), the poet's view of the world seemed a far bigger place. These poems are meant to address two types of isolation and awakening, an evocation of two personal places within oneself. With the stark and desolate beauty of Ashland, Wisconsin and the wandering style of European life, the imaginative nature of two distinct parts of the earth begin to transmit themselves. "Distinctive, memorable, thoughtful and though-provoking ... a remarkable and recommended volume of original poetry." The Midwest Book Review

Aimed at engineering students and professionals working in the field of mechanics of space flight, this book examines space tether systems – one of the most forward-thinking directions of modern astronautics. The main advantage of this technology is the simplicity, profitability and ecological compatibility: space tethers allow the execution of various manoeuvers in orbit without costs of jet fuel due to the use of gravitational and electromagnetic fields of the Earth. This book will acquaint the reader with the modern state of the space tether’s dynamics, with specific attention on the research projects of the nearest decades. This book presents the most effective mathematical models and the methods used for the analysis and prediction of space tether systems’ motion; attention is also given to the influence of the tether on spacecraft’s motion, to emergencies and chaotic modes. Written by highly qualified experts with practical experience in both the fields of mechanics of space flight, and in the teaching Contains detailed descriptions of mathematical models and methods, and their features, that allow the application of the material of the book to the decision of concrete practical tasks New approaches to the decision of problems of space flight mechanics are offered, and new problems are posed

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.