Astronomiske observationer: observatorier, udstyr og metoder

This volume provides an overview of the fast-developing field of tidal disruption events. For several decades, astronomers speculated that a hapless star could wander too close to a massive black hole and be torn apart by tidal forces. Yet it is only with the recent advent of wide-field transient surveys that such events have been detected.Written by a team of prominent researchers, the chapters detail the discoveries made so far in this burgeoning field of study across the entire electromagnetic spectrum, from gamma-rays through X-rays, ultra-violet, optical, infrared, and radio. In addition, they show how tidal disruption events can be used to study the properties of otherwise undetectable supermassive black holes; the populations and dynamics of stars in galactic nuclei; the physics of black hole accretion, including the potential to detect relativistic effects near a SMBH; and the physics of (radio) jet formation and evolution in a pristine environment.Finally,the book outlines important outstanding questions about TDEs. With more than 100 color images, the volume will be useful to researchers and others interested in learning more about this promising area of astrophysics.Previously published in Space Science Reviews in the Topical Collection ¿The Tidal Disruption of Stars by Massive Black Holes¿

Tina Ibsen interviewer Jens Frydenvang, der har deltaget i styringen af Marsrobotterne, Morten Bo Madsen, der har udviklet eksperimenter til undersøgelse af Marsstøvets sammensætning, og Line Drube, der har deltaget i projektet Mars Desert Research Station i Utah, hvor man undersøger, hvordan man kan bo og arbejde sammen under fremtidens Marsmissioner.

Case Studies in Star Formation offers an overview of our current observational and theoretical understanding in the molecular astronomy of star formation. The book is divided into six sections: the first introduces an overview of star formation and the essential language, concepts and tools specific to molecular astronomy studies. Each subsequent section focuses on individual sources, beginning with a description of large-scale surveys. The volume covers low- and high mass star formation, ionization and photodissociation regions, and concludes with the extragalactic perspective. Conventional textbooks begin with principles, ending with a few convenient examples. Through copious examples, Case Studies reflects the reality of research, which requires the creative matching of ongoing observations to theory and vice-versa, often raising as many questions as answers. This supplementary study guide enables graduate students and early researchers to bridge the gap between textbooks and the wealth of research literature.

This book offers review chapters written by invited speakers of the 3rd Session of the Sant Cugat Forum on Astrophysics - Gravitational Waves Astrophysics. All chapters have been peer reviewed. The book goes beyond normal conference proceedings in that it provides a wide panorama of the astrophysics of gravitational waves and serves as a reference work for researchers in the field.

"Confronted by [modern] advances, amateur astronomers - the driving force behind the study of the heavens for much of history - have had to reinvent themselves. Today's 'amateur' is, in fact, a serious professional armed with the latest tools of optics and computers to capture, analyse, catalogue, and disseminate information and images of the night sky (and day sky!). They complement, rather than compete with, the work of major observatories and research scientists. Some areas of study, such as the search for near Earth objects - asteroids and comets - still rely heavily on the efforts of dedicated amateurs. Dr Greg Parker is one such serious amateur." Sir Arthur C. Clarke"The wonders of the Universe are here! Enjoy!" Dr. Brian May"This is a book deserving an honoured place every scientific library, amateur or professional." Sir Patrick Moore

This book highlights a comprehensive coverage of X­¿ray and Gammäray astrophysics. The first and the second parts discuss, respectively, X-ray and Gamma-ray experimental techniques and observatories. The third part is devoted to science, including galactic and extragalactic sources. The fourth and last parts are dedicated to analysis techniques in X-ray and Gamma-ray astronomy: spectral analysis, imagining analysis, timing analysis, and polarimetric analysis. Presenting the state of the art in X-ray and gamma-ray astronomy, this is both a valuable book for students and an important reference resource for researchers in the field.

This book highlights the fundamental physics of orbit theory, dynamical models, methods of orbit determination, design, measurement, adjustment, and complete calculations for the position, tracking, and prediction of satellites and deep spacecraft. It emphasizes specific methods, related mathematical calculations, and worked examples and exercises. Therefore, technicians and engineers in the aerospace industry can directly apply them to their practical work. Dedicated to undergraduate students and graduate students, researchers, and professionals in astronomy, physics, space science, and related aerospace industries, the book is an integrated work based on the accumulated knowledge in satellite orbit dynamics and the author¿s more than five decades of personal research and teaching experience in astronomy and aerospace dynamics.

Unlocking the secrets of the Universe involves the critical application of the laws of physics to the observations. This Very Short Introduction describes how we are turning observations into knowledge and how theory, in turn, is inspiring new observations.

A perfect book for anyone wishing to learn more about our local star, eclipses and the Northern LightsThe Sun is incredibly dynamic and shrouded in mystery, despite its apparent unchanging appearance in the daytime sky. In this guide, Dr. Ryan French explores history, science and modern observations to uncover the mysteries of the Sun.

The XIXth General Assembly of the International Astronomical Union was held in New Delhi, India, from November 19 to 28, 1985. It was dedicated to the memory of a former IAU President, Professor M. K. V. Bappu, who tragically passed away on August 19, 1982. On the occasion of the Delhi General Assembly, the IAU Minor Planet Center announced that Minor Planet (asteroid) No. 2596 henceforth will carry the name Vainu Sappu. The full text of the announcement reads: "e;(2596) VAINU BAPPU = 1979 KN (diameter about 8 kilometers, period 5 years 4 months, mean distance from the Sun around 450 million kilometers) Discovered 1979, May 19, by R. M. West at the European Southern Observatory. Named in memory of Manali f

"e;Observing the Sun"e; is for amateur astronomers at all three levels: beginning, intermediate, and advanced. The beginning observer is often trying to find a niche or define a specific interest in his hobby, and the content of this book will spark that interest in solar observing because of the focus on the dynamics of the Sun. Intermediate and advanced observers will find the book invaluable in identifying features (through photos, charts, diagrams) in a logical, orderly fashion and then guiding the observer to interpret the observations. Because the Sun is a dynamic celestial body in constant flux, astronomers rarely know for certain what awaits them at the eyepiece. All features of the Sun are transient and sometimes rather fleeting. Given the number of features and the complex life cycles of some, it can be a challenging hobby. "e;Observing the Sun"e; provides essential illustrations, charts, and diagrams that depict the forms and life cycles of the numerous features visible on the Sun.

With the advent of CCDs and webcams, the focus of amateur astronomy has to some extent shifted from science to art. Visual work in astronomy has a rich history. Today, imaging is now more prominent. However there is still much for the visual amateur astronomer to do, and visual work is still a valid component of amateur astronomy. Paul Abel has been addressing this issue by promoting visual astronomy wherever possible - at talks to astronomical societies, in articles for popular science magazines, and on BBC TV's The Sky at Night.Visual Lunar and Planetary Astronomy is a comprehensive modern treatment of visual lunar and planetary astronomy, showing that even in the age of space telescopes and interplanetary probes it is still possible to contribute scientifically with no more than a moderately-priced commercially made astronomical telescope.It is believed that imaging and photography is somehow more objective and more accurate than the eye, and this has led to a peculiar "e;crisis of faith"e; in the human visual system and its amazing processing power. But by analyzing observations from the past, we can see how accurate visual astronomy really is! Measuring the rotational period of Mars and making accurate lunar charts for American astronauts were all done by eye. The book includes sections on how the human visual system works, how to view an object through an eyepiece, and how to record observations and keep a scientific notebook. The book also looks at how to make an astronomical, rather than an artistic, drawing. Finally, everything here will also be of interest to those imagers who wish to make their images more scientifically applicable by combining the methods and practices of visual astronomy with imaging.