Space-based Astronomy PDF Download

Author:
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 106

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Author: Willem Wamsteker
Publisher: Springer Science & Business Media
ISBN: 9401107947
Category : Science
Languages : en
Pages : 721

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ROSAT Observations G. HASINGER Max-Planck-Institut flir extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about its constituents. The deepest pointed observations with the ROSAT PSPC are discussed. The logN-logS relation is presented, which reaches to the faintest X-ray fluxes and to the highest AGN surface densities ever achieved. The N(>S) relation shows a 2 density in excess of 400 deg- at the faintest fluxes and a flattening below the Einstein Deep Survey limit. About 60% of the extragalactic background has been resolved in the deepest field. Detailed source spectra and first optical and radio identifications will be discussed. The results are put into perspective of the higher energy X -ray background. Key words: X-rays, background radiations, active galactic nuclei. 1. Introduction The extragalactic X-ray background (XRB), discovered about 30 years ago, has been studied extensively with many X-ray experiments, in particular with the satel lites HEAO I and II (see ego Boldt 1987) and with ROSAT (e. g. Hasinger et aI. , 1993). Figure 1 shows a compilation of some of the most recent spectral measure ments for the X-ray background. Over the energy range from 3 to about 100 keY its spectrum can be well approximated by an optically thin thermal bremsstrahlung model with kT ~ 40 keY, while at lower X-ray energies a steepening into a new component has been observed observed (e. g.

Author: Martin V. Zombeck
Publisher: Cambridge University Press
ISBN: 1139459503
Category : Science
Languages : en
Pages : 95

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Fully updated and including data from space-based observations, this Third Edition is a comprehensive compilation of the facts and figures relevant to astronomy and astrophysics. As well as a vast number of tables, graphs, diagrams and formulae it also includes a comprehensive index and bibliography, allowing readers to easily find the information they require. The book contains information covering a diverse range of topics in addition to astronomy and astrophysics, including atomic physics, nuclear physics, relativity, plasma physics, electromagnetism, mathematics, probability and statistics, and geophysics. This handbook contains the most frequently used information in modern astrophysics, and will be an essential reference for graduate students, researchers and professionals working in astronomy and the space sciences. A website with links to extensive supplementary information and databases can be found at www.cambridge.org/9780521782425.

Author: Joseph A. Angelo
Publisher: Infobase Publishing
ISBN: 1438108966
Category : Juvenile Nonfiction
Languages : en
Pages : 305

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Presents a history of astronomical instruments such as space telescopes and probes as well as related scientific concepts and brief biographies of important individuals.

Author: Joseph A. Angelo
Publisher: Infobase Publishing
ISBN: 1438110189
Category : Science
Languages : en
Pages : 753

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Presents a comprehensive reference to astronomy and space exploration, with articles on space technology, astronauts, stars, planets, key theories and laws and more.

Author: Joseph N. Tatarewicz
Publisher: Indiana University Press
ISBN: 9780253356550
Category : Science
Languages : en
Pages : 218

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"... the book reminds us of an important lesson in the postwar era of big science: that government policy may lead initially to tremendous support for various fields of science and technology." --Science "... a triumph of historical analysis." --Choice "This is an excellent record of the beginnings of the NASA plantetary astronomy program in the years 1958-70." --American Historical Review "The historical circumstances that led to this country's great leap into space were unique, but it is clear that there are many lessons to be learnt from this enthralling tale and Tatarewicz tells the tale well." --Annals of Science When NASA went looking for expertise on the moon and planets following Sputnik, they found that astronomers had long since turned their telescopes away from our planets and toward the stars. Where were the scientists who could help the United States explore the solar system? The answer, as this important new study shows, was that NASA had to create them This story of the precipitous rise and decline of planetary astronomy is an important case study of science in an age of state-managed research and development. It demonstrates that the lines between science, technology, politics, and society are anything but fixed and impermeable.

Author: Lisa Miles
Publisher: E.D.C. Publishing
ISBN: 9780746031049
Category : Fiction
Languages : en
Pages : 100

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Introduces our universe, our solar system, its planets, moons, asteroids, comets, the stars, constellations, and astronomy facts.

Author: Neil English
Publisher: Springer
ISBN: 3319278142
Category : Science
Languages : en
Pages : 315

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Space telescopes are among humankind’s greatest scientific achievements of the last fifty years. This book describes the instruments themselves and what they were designed to discover about the Solar System and distant stars. Exactly how these telescopes were built and launched and the data they provided is explored. Only certain kinds of radiation can penetrate our planet's atmosphere, which limits what we can observe. But with space telescopes all this changed. We now have the means to "see" beyond Earth using ultraviolet, microwave, and infrared rays, X-rays and gamma rays. In this book we meet the pioneers and the telescopes that were built around their ideas. This book looks at space telescopes not simply chronologically but also in order of the electromagnetic spectrum, making it possible to understand better why they were made.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309157994
Category : Science
Languages : en
Pages : 324

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Driven by discoveries, and enabled by leaps in technology and imagination, our understanding of the universe has changed dramatically during the course of the last few decades. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and computer science. Based on a broad and comprehensive survey of scientific opportunities, infrastructure, and organization in a national and international context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for ground- and space- based astronomy and astrophysics for the decade of the 2010's. Realizing these scientific opportunities is contingent upon maintaining and strengthening the foundations of the research enterprise including technological development, theory, computation and data handling, laboratory experiments, and human resources. New Worlds, New Horizons in Astronomy and Astrophysics proposes enhancing innovative but moderate-cost programs in space and on the ground that will enable the community to respond rapidly and flexibly to new scientific discoveries. The book recommends beginning construction on survey telescopes in space and on the ground to investigate the nature of dark energy, as well as the next generation of large ground-based giant optical telescopes and a new class of space-based gravitational observatory to observe the merging of distant black holes and precisely test theories of gravity. New Worlds, New Horizons in Astronomy and Astrophysics recommends a balanced and executable program that will support research surrounding the most profound questions about the cosmos. The discoveries ahead will facilitate the search for habitable planets, shed light on dark energy and dark matter, and aid our understanding of the history of the universe and how the earliest stars and galaxies formed. The book is a useful resource for agencies supporting the field of astronomy and astrophysics, the Congressional committees with jurisdiction over those agencies, the scientific community, and the public.

Author: United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space
Publisher:
ISBN:
Category :
Languages : en
Pages : 1122

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