Space-based Astronomy
Author | : |
Publisher | : |
Total Pages | : 106 |
Release | : 1994 |
Genre | : Astronomy |
ISBN | : |
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Author | : |
Publisher | : |
Total Pages | : 106 |
Release | : 1994 |
Genre | : Astronomy |
ISBN | : |
Author | : Willem Wamsteker |
Publisher | : Springer Science & Business Media |
Total Pages | : 721 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401107947 |
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 | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 89 |
Release | : 1997-07-06 |
Genre | : Science |
ISBN | : 0309058279 |
Author | : National Aeronautics and Space Administration |
Publisher | : CreateSpace |
Total Pages | : 104 |
Release | : 2014-04-16 |
Genre | : Science |
ISBN | : 9781499170672 |
This curriculum guide uses hands-on activities to help student and teachers understand the significance of space-based astronomy- astronomical observation made from outer space.
Author | : David Leverington |
Publisher | : Cambridge University Press |
Total Pages | : 524 |
Release | : 2000 |
Genre | : Nature |
ISBN | : 9780521658331 |
An extensively illustrated account of the development and achievements of astronomical observations from space since WWII.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 66 |
Release | : 2007-07-05 |
Genre | : Science |
ISBN | : 0309107342 |
The astronomy science centers established by the National Aeronautics and Space Administration (NASA) to serve as the interfaces between astronomy missions and the community of scientists who utilize the data have been enormously successful in enabling space-based astronomy missions to achieve their scientific potential. These centers have transformed the conduct of much of astronomical research, established a new paradigm for the use of large astronomical facilities, and advanced the science far beyond what would have been possible without them. Portals to the Universe: The NASA Astronomy Science Centers explains in detail the findings of this report.
Author | : Martin V. Zombeck |
Publisher | : Cambridge University Press |
Total Pages | : 95 |
Release | : 2006-11-09 |
Genre | : Science |
ISBN | : 1139459503 |
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 | : Tish Rabe |
Publisher | : Random House Books for Young Readers |
Total Pages | : 24 |
Release | : 2019-06-18 |
Genre | : Juvenile Nonfiction |
ISBN | : 0593126440 |
Laugh and learn with fun facts about the sun, the moon, the planets, constellations, astronauts, and more—all told in Dr. Seuss’s beloved rhyming style and starring The Cat in the Hat! “The universe is a mysterious place. We are only just learning what happens in space.” The Cat in the Hat’s Learning Library series combines beloved characters, engaging rhymes, and Seussian illustrations to introduce children to non-fiction topics from the real world! On this adventure into outer space, readers will discover: • what makes each planet in our solar system unique • how a million Earths could fit inside the sun • how astronauts have driven a special car all over the moon • and much more! Perfect for story time and for the youngest readers, There’s No Place Like Space: All About Our Solar System also includes an index, glossary, and suggestions for further learning. Look for more books in the Cat in the Hat’s Learning Library series! Cows Can Moo! Can You? All About Farms Hark! A Shark! All About Sharks If I Ran the Dog Show: All About Dogs Oh Say Can You Say Di-no-saur? All About Dinosaurs On Beyond Bugs! All About Insects One Vote Two Votes I Vote You Vote Who Hatches the Egg? All About Eggs Why Oh Why Are Deserts Dry? All About Deserts Wish for a Fish: All About Sea Creatures
Author | : Joseph A. Angelo |
Publisher | : Infobase Publishing |
Total Pages | : 305 |
Release | : 2014-05-14 |
Genre | : Juvenile Nonfiction |
ISBN | : 1438108966 |
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 | : Lisa Miles |
Publisher | : E.D.C. Publishing |
Total Pages | : 100 |
Release | : 1998 |
Genre | : Fiction |
ISBN | : 9780746031049 |
Introduces our universe, our solar system, its planets, moons, asteroids, comets, the stars, constellations, and astronomy facts.