Libros de Astronomía y Astrofísica, página 5 de 111

A spectacular pictorial history of astronomical exploration, for anyone who has gazed at the sky and wondered what lies beyond From the beginning of time, human beings have looked up at the stars and speculated on other worlds. Published to mark the fif

Being an amateur astronomer is great fun, with many different and interesting areas to get involved in. This complete reference provides a wealth of practical information covering all aspects of amateur astronomy. Organised thematically for ease of use, it covers observing techniques, telescopes and observatories, Internet resources, and the objects that can be studied. Those new to the field will find tips, techniques and plans on how to begin their quest, and more advanced observers will find lots of useful advice on how to get more out of their hobby. Containing the most recent data, the ...

Known edition after edition for its state-of-the-science coverage, Universe breaks new ground in its Eighth Edition with added pedagogical support and pioneering media and supplements. It places the basics of astronomy and the process of science within the grasp of introductory students.

Esta es una obra acerca de la estrategia competitiva, escrita por una economista, quien afirma que las ideas fundamentales en la microeconomía son muy importantes para comprender la planeación estrategica.La obra aborda tres temas fundamentales.En primer lugar, siguiendo la tradicion economica, se centra en la naturaleza competitiva de la estrategia competitiva, dedicando gran parte al estudio de la forma en la cual las fuerzas interactivas dentro del mercado y fuera de el, afectan las elecciones estrategicas disponibles para las organizaciones y los resultados de esas elecciones.En segundo tema de este libro es la importancia del cambio, el cual es esencial para el movimiento, de manera que podamos pensar en la planeacion estrategica como una forma de crear y mantener el cambio.El ultimo tema es que las elecciones implicadas en el desarrollo de una estrategia, se hacen inevitablemente en el contexto de una informacion limitada y de las fricciones en el mercado.Esta obra, en sintesis, proporciona un claro y solido entendimiento del analisis moderno de la competitividad, en la cual ademas, se examina el ambiente competitivo, el interior de la organizacion, el grado de rivalidad y el proceso de planeacion.

Why, today, would anyone undertake a plan to launch a spacecraft some 30 years in the future, and on a journey that would take some 40 years to complete? Paul Gilster investigates the science, and the spirit, of the NASA and JPL researchers who are actually at work on just such a project.''Gilster introduces the challenges of imagining and planning interstellar exploration by leading readers through the difficulties of reaching and exploring the nearest bright star, Alpha Centauri. Seeded by ideas and concepts of the late Robert Forward, the narrative is framed as a learning process undertaken simultaneously by writer and reader. Although Alpha Centauri is astronomically nearby, a postulated trip by robot spacecraft, followed by manned exploration, would take 50 to 1,000 years, depending on the type of spacecraft propulsion used. Various methods for interstellar travel are introduced and discussed, including solar sails that use the power of starlight, nuclear fusion, antimatter hybrid systems, and beamed laser propulsion'' - W. E. Howard III, "CHOICE", March 2005.''One challenge is to get there in a reasonable time so that funding support, public interest, and events on Earth will not divert attention from the mission. Another challenge is timing the mission relative to available technology, because with better technology it might be possible to send a later robot on the same mission in less time. The book has no figures, tables, or illustrations but does include 30 pages of notes and an adequate 14-page index. Though the concepts presented are often fanciful, this book will appeal to readers who wonder about the future of exploration beyond the solar system. Summing Up: Highly recommended. General readers; professionals'' - W. E. Howard III, "CHOICE", March 2005.