Various kinds of masks obscure our view of our galaxy, the Milky Way, as well as of other galaxies. Masks of interstellar dust affect our measurements within galaxies, on scales ranging from individual supernovae to the galaxies themselves. The “mass mask” (our inability to image mass rather than light) gives astronomers a very incomplete picture of the size and structure of galaxies themselves, because we cannot image the dark matter which provides most of the galactic mass
THE ESSENTIAL WORLD HISTORY, 6e presents a balanced picture of world history that pays respect to the richness and diversity of the tapestry of the human experience. Based on the Sixth Edition of Duiker and Spielvogels comprehensive WORLD HISTORY, this critically and popularly acclaimed book balances a thorough global approach with attention to the unique character and development of civilization in divergent parts of the world. The text covers individual civilizations such as China, India, and Europe, with due attention paid to the rise of the West, and provides points of comparison between and among these civilizations.
DVD диск содержит руководство пользователя автомобилей Opel, информацию по нормо-часам и инструкции по диагностике и поиску неисправностей, руководства по демонтажу, разборке, установке и регулировке всех агрегатов и узлов конкретной машины с подробными картинками узлов и спец-инструментов.
Over the past ten years, the discovery of extrasolar planets has opened a new field of astronomy, and this area of research is rapidly growing, from both the observational and theoretical point of view.
Studies of stellar formation in galaxies have a profound impact on our understanding of the present and the early universe. The book describes complex physical processes involved in the creation of stars and during their young lives. It illustrates how these processes reveal themselves from radio wavelengths to high energy X-rays and gamma -rays, with special reference towards high energy signatures.
This masterly account of Leonardo da Vinci and his vision of the world has long been recognized as the classic treatment of the Renaissance giant, offering unparalleled insight into Leonardos intellect and vision at every stage of his artistic career. Martin Kemp, one of the worlds leading authorities on Leonardo, takes us on a mesmerizing journey through the whole span of the great mans life, painting a fully integrated picture of his artistic, scientific, and technological achievements. Kemp shows how Leonardos early training in Florence provided a crucial foundation in the science of art, particularly perspective and anatomy, while his period in the service of the Sforzas of Milan enlarged his outlook to embrace a wide range of natural sciences and mathematics, as he searched for scientific rules governing both man and the universe
Генная инженерия — одна из наиболее загадочных, а потому интересных наук современности. Знаете ли вы, что уже сейчас существуют такие разработки, которые способны поставить с ног на голову сами понятия флоры и фауны?
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The books in this series give in-depth coverage to four of the Ancient Worlds most important civilizations. The books show how these civilizations began, how they developed and became large and important ones, and how they eventually died out. Trade, arts, education, and political and religious topics are all covered