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High Quality Content by WIKIPEDIA articles! An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. In contrast, globular clusters are very tightly bound by gravity. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring. They are usually less than a few hundred million years old: they become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center, as well as losing cluster members through internal close encounters.

Lila Guzman, Rick Guzman

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Michael H. Carr

Our knowledge of Mars has grown enormously over the last decade as a result of the Mars Global Surveyor, Mars Odyssey, Mars Express, and the two Mars Rover missions. This book is a systematic summary of what we have learnt about the geological evolution o Mars as a result of these missions. It describes the diverse Martian surface features and summarizes current ideas as to how, when, and under what conditions they formed, and explores how Earth and Mars differ and why the two planets evolved so differenty. The author also discusses possible implications of the geologic history for the origin and survival of indigenous Martian life. Up-to-date and highly illustrated, this book will be a principal reference for researchers and graduate students in planetar science. The comprehensive list of references will also assist readers in pursuing further information on the subject. Colour images can be found at www.cambridge.org/9780521872010.

Giovanni Caviezel

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D. G. Kaskaoutis, H. D. Kambezidis, K. V. S. Badarinath, Shailesh Kumar Kharol

Dust storms are considered natural hazards which affect ecosystems for a short-time interval ranging from a few hours to a few days. Due to the significant impact of dust outbreaks on climate, human health and ecosystems, numerous studies have been conducted throughout the world with differing instrumentation and techniques focusing on the investigation about such events. Focusing mainly on the Sahara desert, this book provides a short review on the recent knowledge about the dust aerosol optical and physico-chemical properties, the seasonal variability of dust outbreaks, the dust source regions, the main pathways towards Southern Europe, which is mostly influenced, and the main results of similar studies. The authors provide a new methodology to the scientific community for the dust transport monitoring using a combination of satellite data and back-trajectory analysis for the identification of coarse-mode aerosols, Sahara dust (SD) events and the analysis of the dust-transport...

Ibp Usa

Us Satellite Communication Companies Directory

Ron Martin

Money and the Space Economy Contributor list Pietro Alessandrini Leslie Budd Gordon Clark Sheila Dow Richard T. Harrison Alan Hudson Roger Lee Colin Mason Jane Pollard David J. Porteous Barney Warf Neil Wrigley Alberto Zazzaro Money is central to understanding the space economy. Not only does money itself have its own geographies, but these in turn help to shape the geographies of economic activity more generally. Across the global economy banking systems and money markets are being restructured. A new economic geography of money and finance is emerging, reflecting, among other things, the momentous changes that are taking place in the world?s financial systems, particularly the impact of globalisation, deregulation, privatisation and technological change. Money and the Space Economy brings together leading geographers and economists working on money to highlight the changing geographies of banking, the forces underpinning and threatening international financial centres, the...

Will Gater, Anton Vamplew

For anyone who's ever looked at the night sky and wanted to know more about the galaxy around them, The Practical Astronomer shows readers how to discover and understand the mysteries of the solar system and beyond. Illustrated throughout with detailed photographs and illustrations, and using clear, easy-to-follow text, The Practical Astronomer takes you on a step-by-step journey from the basics of what can be seen with the naked eye, to how you can view more distant objects such as the planets of the solar system, and even galaxies far, far away-all in your own backyard.

International Telecommunications Union

Panorama esencial de las comunicaciones por satelite realizado por la organizacion que establece las normas internacionales Desde su introduccion a mediados del decenio de 1960, las comunicaciones por satelite han pasado de ser un experimento futurista a formar parte integrante del actual "mundo interconectado". Las comunicaciones por satelite constituyen el nucleo de una red telefonica mundial con conmutacion, con mas de 140,000 canales de comunicaciones en funcionamiento (voz, datos, video), contando solo en el sistema INTELSAT. Elaborado por la Union Internacional de Telecomunicaciones–la organizacion internacional que establece las normas para esta industria en rapido crecimiento–el Manual de comunicaciones por satelite, Tercera Edicion reune los hechos fundamentales en el sector de las comunicaciones por satelite en relacion con el servicio...

This book was compiled from those contributions given at the 7th IAA Symposium on Small Satellites for Earth Observation, May 4-8, 2009, Berlin (IAA a?? International Academy of Astronautics) which are representative for the new developments and trends in the area of small satellites for Earth observation. They reflect the potentials of a diversity of missions and related technologies. They may be based on national projects or international co-operations, single satellites of constellations, pico-, nano-, micro- or mini-satellites, developed by companies, research institutions or agencies. The main focus is on new missions to monitor our Eartha??s resources (chapter 1), and the environment in which our Earth is embedded (chapter 2). Chapter 3 deals with distributed space systems, the unique feature of small satellites. The university satellites chapter (chapter 4) shows the high quality which is already reached by some of the universities worldwide. Chapter 5 gives insight into new...