Americans are divided over the future of the U.S. space program. Some say it's time to send astronauts back to the Moon, as well as to Mars for the first time. They believe that exploring these worlds will lead to all sorts of payoffs, including new scientific knowledge, new sources of energy, and perhaps even future homes for humans. Others strongly disagree. They argue that the dangers and costs of crewed space exploration are too great to be justified. They believe that robots can do a better job of exploring the Moon, Mars, and other parts of space—for much less money and with no risk to human life. Understanding this debate involves looking at the facts and figures and talking to experts on both sides. It also involves some probing questions: • In a time of economic crisis, should the United States be spending billions of dollars on crewed space exploration? • How would science, industry, and human society benefit from crewed missions to the Moon and Mars? • Who should foot the bill—the United States, a consortium of nations, or private business? To answer these questions, this book looks at the costs of crewed missions to Mars and the Moon, as well as the potential payoff; the dangers of space exploration, both physical and psychological; and the potential for human settlement on Mars. We'll hear a variety opinions—from astronauts, astronomers, U.S. presidents, and NASA officials. Supplemented with quotes, anecdotes, and discussions from the pages of USA TODAY, The Nation's No. 1 Newspaper, this book will broaden your understanding of the issue and help you form your own opinion, either for or against crewed missions to the Moon and Mars.

This book carries out approximate estimates of the costs of implementing ISRU on the Moon and Mars. It is found that no ISRU process on the Moon has much merit. ISRU on Mars can save a great deal of mass, but there is a significant cost in prospecting for resources and validating ISRU concepts. Mars ISRU might have merit, but not enough data are available to be certain. In addition, this book provides a detailed review of various ISRU technologies. This includes three approaches for Mars ISRU based on processing only the atmosphere: solid oxide electrolysis, reverse water gas shift reaction (RWGS), and absorbing water vapor directly from the atmosphere. It is not clear that any of these technologies are viable although the RWGS seems to have the best chance. An approach for combining hydrogen with the atmospheric resource is chemically very viable, but hydrogen is needed on Mars. This can be approached by bringing hydrogen from Earth or obtaining water from near-surface water deposits in the soil. Bringing hydrogen from Earth is problematic, so mining the regolith to obtain water seems to be the only way to go. This will require a sizable campaign to locate and validate useable water resources. Technologies for lunar ISRU are also reviewed, even though none of them provide significant benefits to near-term lunar missions. These include oxygen from lunar regolith, solar wind volatiles from regolith, and extraction of polar ice from permanently shaded craters.

This book discusses the vital role of chemistry in everyday life. It encourages readers to understand how the knowledge of chemistry is important for the development of society and a better future. The text is organized into three parts. Part 1 covers the historical aspects of chemistry and discusses how countless discoveries since the beginning of life on earth have benefited human beings. Part 2 focuses on modern life and describes chemistry’s contribution to the developments in the fields of food and agriculture, energy, transportation, medicine, and communications. Part 3 emphasizes the role of chemists and educators in making the layperson aware of the benefits of chemistry without having them to go through its complexities. Written in an easy-to-understand manner and supplemented by ample number of figures and tables, the book will cater to a broad readership ranging from general readers to experts.

2008 Outstanding Academic Title, Choice Magazine Given the near incomprehensible enormity of the universe, it appears almost inevitable that humankind will one day find a planet that appears to be much like the Earth. This discovery will no doubt reignite the lure of interplanetary travel. Will we be up to the task? And, given our limited resources, biological constraints, and the general hostility of space, what shape should we expect such expeditions to take? In Robots in Space, Roger Launius and Howard McCurdy tackle these seemingly fanciful questions with rigorous scholarship and disciplined imagination, jumping comfortably among the worlds of rocketry, engineering, public policy, and science fantasy to expound upon the possibilities and improbabilities involved in trekking across the Milky Way and beyond. They survey the literature—fictional as well as academic studies; outline the progress of space programs in the United States and other nations; and assess the current state of affairs to offer a conclusion startling only to those who haven't spent time with Asimov, Heinlein, and Clarke: to traverse the cosmos, humans must embrace and entwine themselves with advanced robotic technologies. Their discussion is as entertaining as it is edifying and their assertions are as sound as they are fantastical. Rather than asking us to suspend disbelief, Robots in Space demands that we accept facts as they evolve.

In this book, Donald Rapp looks at human missions to Mars from a technological perspective. He divides the mission into a number of stages: Earth’s surface to low-Earth orbit (LEO); departing from LEO toward Mars; Mars orbit insertion and entry, descent and landing; ascent from Mars; trans-Earth injection from Mars orbit and Earth return. A mission to send humans to explore the surface of Mars has been the ultimate goal of planetary exploration since the 1950s, when von Braun conjectured a flotilla of 10 interplanetary vessels carrying a crew of at least 70 humans. Since then, more than 1,000 studies were carried out. This third edition provides extensive updating and additions to the last edition, including new sections, and many new figures and tables, and references.

During 1988, the National Research Council's Space Science Board reorganized itself to more effectively address NASA's advisory needs. The Board's scope was broadened: it was renamed the Space Studies Board and, among other new initiatives, the Committee on Human Exploration was created. The new committee was intended to focus on the scientific aspects of human exploration programs, rather than engineering issues. Their research led to three reports: Scientific Prerequisites for the Human Exploration of Space published in 1993, Scientific Opportunities in the Human Exploration of Space published in 1994, and Science Management in the Human Exploration of Space published in 1997. These three reports are collected and reprinted in this volume in their entirety as originally published.

Advancements in space exploration over the years have shown us that Mars has water, one of the necessary conditions for life as we know it. Does that mean people will be able to travel to Mars soon? This book answers that common question through accessible, fun text written by an educator and vivid photography straight from NASA. Even the most reluctant reader will enjoy how easily this text walks through the current projects and past missions of Mars' history and future.