15 Ergebnisse.

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 exploratio...

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 exploratio...

This updated and revised new edition of Assessing Climate Change deals with the full gamut of essential questions in relation to global warming and climate change, uniquely providing a balanced and impartial discussion of this controversial subject. It shows that most of what is “known”about the Sun, historical climates and projections for the future lacks foundation and leaves great room for doubt.Assessing Climate Change (3rd Edition) examin...

Ice ages represent perhaps the most dramatic example of extreme climate change on the Earth. Understanding how and why ice ages occur is of great importance in our wider understanding of the global climate system and how it might change. If one examines Greenland ice data for the past 100, 000 years, it becomes very clear that the relatively warm period of the past 11, 000 years stand out in striking contrast to the 90, 000 years of extreme co...

This book presents a detailed, independent review of essentially all the technical aspects of “in situ resource utilization” (ISRU), offering the first in-depth discussion of the issues of crew size, ascent from Mars, and ISRU processes. It also provides data on lunar ISRU not previously available to the public.This new edition provides a short synopsis of the Mars mission, and discusses various topics, including solid oxide electrolysis, whic...

It is not so long ago (a mere 17, 000 years – a blink in geologic time) that vast areas of the Northern Hemisphere were covered with ice sheets up to two miles thick, lowering the oceans by more than 120 m. By 11, 000 years ago, most of the ice was gone. Evidence from polar ice cores and ocean sediments show that Ice Ages were persistent and recurrent over the past 800, 000 years. The data suggests that Ice Ages were the normal state, and wer...

This book presents a detailed, independent review of essentially all the technical aspects of “in situ resource utilization” (ISRU), offering the first in-depth discussion of the issues of crew size, ascent from Mars, and ISRU processes. It also provides data on lunar ISRU not previously available to the public.This new edition provides a short synopsis of the Mars mission, and discusses various topics, including solid oxide electrolysis, whic...

A mission to send humans to explore the surface of Mars has been theultimate goal of planetary exploration since the 1950s, when von Braun envisaged a flotilla of 10 interplanetary vessels carrying a crew of at least 70 humans. Since then, more than 1, 000 studies have been carried out on human missions to Mars, but after 60 years of study, we remain in the early planning stages. The second edition of this book now includes an annotated histor...

This updated and revised new edition of Assessing Climate Change deals with the full gamut of essential questions in relation to global warming and climate change, uniquely providing a balanced and impartial discussion of this controversial subject. It shows that most of what is “known”about the Sun, historical climates and projections for the future lacks foundation and leaves great room for doubt.Assessing Climate Change (3rd Edition) examin...

This book presents a highly readable yet realistic view of the possibilities for human missions to Mars. It provides for the first time a 'level-headed' assessment of plans for human exploration of Mars to counteract the tendency of space agencies to take an over-optimistic approach to such interplanetary missions. The author presents a detailed analysis of why, in his opinion, the current NASA approach will fail to send humans to Mars before ...

Existing books on ice ages are mostly short, popular, and non-technical. Many deal with the effects of the last ice age on flora and fauna. The small book by the Imbries is mostly historical and reflects their undying belief in the astronomical theory. The only book that attempts to deal with the broad issues of what we know about past ice ages and why they occur is the book by Muller and MacDonald (M&M, ), published by Praxis. However, despit...

This book deals at some length with the question: Since there are many more poor than rich, why don’t the poor just tax the rich heavily and reduce the inequality? In the 19th century and the first half of the 20th century, the topic of inequality was discussed widely. Ending or reducing inequality was a prime motivating factor in the emergence of communism and socialism. The book discusses why later in the 20th century, inequality has faded o...

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 technolo...

The second edition of this book has been completely updated. It studies the history and gives an analysis of extreme climate change on Earth. In order to provide a long-term perspective, the first chapter briefly reviews some of the wild gyrations that occurred in the Earth's climate hundreds of millions of years ago: snowball Earth and hothouse Earth. Coming closer to modern times, the effects of continental drift, particularly the closing of...

A mission to send humans to explore the surface of Mars has been theultimate goal of planetary exploration since the 1950s, when von Braun envisaged a flotilla of 10 interplanetary vessels carrying a crew of at least 70 humans. Since then, more than 1, 000 studies have been carried out on human missions to Mars, but after 60 years of study, we remain in the early planning stages. The second edition of this book now includes an annotated histor...