Download or read book Sunspots Theory and Observations written by J.H. Thomas and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the invited papers presented at the NATO Advanced Research Workshop on the Theory of Sunspots, held in Cambridge, England, 22-27 September 1991. The idea of holding this Workshop first arose during the Solar Optical Telescope work shop on Theoretical Problems in High-Resolution Solar Physics in Munich in 1985. At that meeting, separate discussion groups were formed to consider specific topics in solar physics. The discussion group on sunspots recommended that there be a meeting devoted to theoretical problems associated with sunspots, the motivation being the consensus that theory seemed to lag behind the observational evidence in our quest for a satisfactory un derstanding of the physics of sunspots. This recommendation was warmly received and the two of us were designated to organize the Workshop. Although the Workshop eventually took place later than originally envisioned, the de lay turned out to be fortunate and the timing of the Workshop was ideal for a number of reasons. There have been remarkable improvements in high-resolution observations of sunspots in the past few years, and many important new observational results were pre sented for the first time at this Workshop (by groups working at the Lockheed Palo Alto Research Laboratories, the Swedish and German telescopes in the Canary Islands, and the V. S. National Solar Observatory). Vector magnetographs and Stokes polarimetry have at last given us reliable measurements of the vector magnetic fields in sunspots.
Download or read book New Views of Sunspots written by Jacques Maurice Beckers and published by . This book was released on 1975 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report reviews recent theoretical and observational developments in sunspot physics. It concentrates especially on the recent discoveries of rapid changes in sunspots, most of them oscillatory, and their connection with Alfven waves generated in spots.
Download or read book SUNSPOTS THEORY written by Robert E. Danielson and published by . This book was released on 1965 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory lecture on the theory of sunspots consists of three parts. The first part is devoted to a discussion of some pertinent sunspot observations. The second part reviews hydromagnetic stability calculations which are applicable to sunspots. Two recent theoretical sunspot models are discussed in the third part. (Author).
Download or read book Visual High Resolution Observations of Sunspots written by Patrick S. McIntosh and published by . This book was released on 1962 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bureau d'Analyse et de Recherche Appliquees (France). ANALOG STUDY OF SOME PROBLEMS RELATIVE TO LIFTING SURFACES IN AN HELICOIDAL MOVEMENT. Final rept. 1962. 28p. incl. illus. (Contract N62558-2997) Unclassified report DESCRIPTORS: *Marine propellers, *Analog sys tems, *Fluid mechanics, Surfaces, Simulation, Water. The first report defined the general principles of utilization and construction of a analog tank for studying the perturbation potential around lifting surfaces submitted to an helicoidal movement. The prese t report, which utilizes the sa e quotations, gives the results obtained with this tank in the resolution of various elementary problems. These determinations were used for the final setup of the analog model which can be considered as correspondingACCURATELY TO ITS ANTICIPATE FUNCTIO . (Author).
Download or read book Magnetic Field of Sunspots written by Lev Ėmmanuilovich Gurevich and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations of the Spots on the Sun written by Richard Christopher Carrington and published by . This book was released on 1863 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sunspots and Starspots written by and published by . This book was released on 2008 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sunspottery Or What Do We Owe to the Sun written by J. A. Westwood Oliver and published by . This book was released on 1883 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nature s Third Cycle written by Arnab Rai Choudhuri and published by OUP Oxford. This book was released on 2015-01-29 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cycle of day and night and the cycle of seasons are two familiar natural cycles around which many human activities are organized. But is there a third natural cycle of importance for us humans? On 13 March 1989, six million people in Canada went without electricity for many hours: a large explosion on the sun was discovered as the cause of this blackout. Such explosions occur above sunspots, dark features on the surface of the Sun that have been observed through telescopes since the time of Galileo. The number of sunspots has been found to wax and wane over a period of 11 years. Although this cycle was discovered less than two centuries ago, it is becoming increasingly important for us as human society becomes more dependent on technology. For nearly a century after its discovery, the cause of the sunspot cycle remained completely shrouded in mystery. The 1908 discovery of strong magnetic fields in sunspots made it clear that the 11-year cycle is the magnetic cycle of the sun. It is only during the last few decades that major developments in plasma physics have at last given us the clue to the origins of the cycle and how the large explosions affecting the earth arise. Nature's Third Cycle discusses the fascinating science behind the sunspot cycle, and gives an insider's perspective of this cutting-edge scientific research from one of the leaders of the field.
Download or read book On Sunspots written by Galileo Galilei and published by University of Chicago Press. This book was released on 2010-10-30 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galileo’s telescopic discoveries, and especially his observation of sunspots, caused great debate in an age when the heavens were thought to be perfect and unchanging. Christoph Scheiner, a Jesuit mathematician, argued that sunspots were planets or moons crossing in front of the Sun. Galileo, on the other hand, countered that the spots were on or near the surface of the Sun itself, and he supported his position with a series of meticulous observations and mathematical demonstrations that eventually convinced even his rival. On Sunspots collects the correspondence that constituted the public debate, including the first English translation of Scheiner’s two tracts as well as Galileo’s three letters, which have previously appeared only in abridged form. In addition, Albert Van Helden and Eileen Reeves have supplemented the correspondence with lengthy introductions, extensive notes, and a bibliography. The result will become the standard work on the subject, essential for students and historians of astronomy, the telescope, and early modern Catholicism.
Download or read book The Enigma of Sunspots written by Judit Brody and published by . This book was released on 2002 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sunspots are dark areas on the Sun's surface, some as large as 50,000 miles in diameter. This text charts the history of our efforts to understand them, and the lives and quarrels of those astronomers who first charted their mysterious patterns and whose records are still of vital importance.
Download or read book Observations of Sunspots and Measures of Solar Photographs written by Herbert Couper Wilson and published by . This book was released on 1901 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sun Kings written by Stuart Clark and published by Princeton University Press. This book was released on 2009-04-12 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recounts the story behind English astronomer Richard Carrington's observations of a mysterious explosion on the surface of the sun and how his understanding that the sun's magnetism directly influences the Earth helped usher in the modern era of astronomy.
Download or read book Solar Activity Reconstruction from Historical Observations of Sunspots written by Senthamizh Pavai Valliappan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The solar activity and its consequences affect space weather and Earth's climate. The solar activity exhibits a cyclic behaviour with a period of about 11 years. The solar cycle properties are governed by the dynamo taking place in the interior of the Sun, and they are distinctive. Extending the knowledge about solar cycle properties into the past is essential for understanding the solar dynamo and forecasting space weather. It can be acquired through the analysis of historical sunspot drawings. Sunspots are the dark areas, which are associated with strong magnetic fields, on the solar surface. Sunspots are the oldest and longest available observed features of solar activity. One of the longest available records of sunspot drawings is the collection by Samuel Heinrich Schwabe during 1825-1867. The sunspot sizes measured from digitized Schwabe drawings are not to scale and need to be converted into physical sunspot areas. We employed a statistical approach assuming that the area distribution of sunspots was the same in the 19th...
Download or read book Cosmic Rays at Earth written by P.K.F. Grieder and published by Elsevier. This book was released on 2001-07-27 with total page 1117 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1912 Victor Franz Hess made the revolutionary discovery that ionizing radiation is incident upon the Earth from outer space. He showed with ground-based and balloon-borne detectors that the intensity of the radiation did not change significantly between day and night. Consequently, the sun could not be regarded as the sources of this radiation and the question of its origin remained unanswered. Today, almost one hundred years later the question of the origin of the cosmic radiation still remains a mystery.Hess' discovery has given an enormous impetus to large areas of science, in particular to physics, and has played a major role in the formation of our current understanding of universal evolution. For example, the development of new fields of research such as elementary particle physics, modern astrophysics and cosmology are direct consequences of this discovery. Over the years the field of cosmic ray research has evolved in various directions: Firstly, the field of particle physics that was initiated by the discovery of many so-called elementary particles in the cosmic radiation. There is a strong trend from the accelerator physics community to reenter the field of cosmic ray physics, now under the name of astroparticle physics. Secondly, an important branch of cosmic ray physics that has rapidly evolved in conjunction with space exploration concerns the low energy portion of the cosmic ray spectrum. Thirdly, the branch of research that is concerned with the origin, acceleration and propagation of the cosmic radiation represents a great challenge for astrophysics, astronomy and cosmology. Presently very popular fields of research have rapidly evolved, such as high-energy gamma ray and neutrino astronomy. In addition, high-energy neutrino astronomy may soon initiate as a likely spin-off neutrino tomography of the Earth and thus open a unique new branch of geophysical research of the interior of the Earth. Finally, of considerable interest are the biological and medical aspects of the cosmic radiation because of it ionizing character and the inevitable irradiation to which we are exposed. This book is a reference manual for researchers and students of cosmic ray physics and associated fields and phenomena. It is not intended to be a tutorial. However, the book contains an adequate amount of background materials that its content should be useful to a broad community of scientists and professionals. The present book contains chiefly a data collection in compact form that covers the cosmic radiation in the vicinity of the Earth, in the Earth's atmosphere, at sea level and underground. Included are predominantly experimental but also theoretical data. In addition the book contains related data, definitions and important relations. The aim of this book is to offer the reader in a single volume a readily available comprehensive set of data that will save him the need of frequent time consuming literature searches.
Download or read book Magnetic Observation of Sunspots 1917 1924 written by George Ellery Hale and published by . This book was released on 1938 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sun the Earth and Near earth Space written by John A. Eddy and published by Government Printing Office. This book was released on 2009 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and Sun-Climate."--Dear Reader.
