Peter K. Schneider Libros

Light observed from distant objects is found to be deflected by the gravitational field of massive objects near the line of sight - an effect predicted by Einstein in his first paper setting forth the general theory of relativity, and confirmed by Eddington soon afterwards. If the source of the light is sufficiently distant and bright, and if the intervening object is massive enough and near enough to the line of sight, the gravitational field acts like a lens, focusing the light and producing one or more bright images of the source. This book, by renowned researchers in the field, begins by discussing the basic physics behind gravitational lenses: the optics of curved space-time. It then derives the appropriate equations for predicting the properties of these lenses. In addition, it presents up-to-date observational evidence for gravitational lenses and describes the particular properties of the observed cases. The authors also discuss applications of the results to problems in cosmology.

A tour of Germany after reunification provides anecdotes of the West German people, an East German baker, Bavarian yodelers, Stalinist functionaries, and Western capitalists

Berlin before the fall of the Wall is a city divided, yet its ordinary residents find ways to live and survive on both sides. There is Robert, teller of bar room anecdotes over beer and vodka, adjusting to a new life in the west; Pommerer, trying to outwit the system in the east; the unnamed narrator, who 'escapes' back-and-forth to collect stories; his beguiling, exiled lover Lena; the three boys who defect to watch Hollywood films; and the man who leaps across the Wall again and again - simply because he cannot help himself. All are, in their different ways, wall jumpers, trying to lose themselves but still trapped wherever they go. Ultimately, the walls inside their heads prove to be more powerful than any man-made barrier . . .

On the 25th Anniversary of the fall of the Wall, a legendary Berliner tells the inside story of the city. Over the last five decades, no city has changed more than Berlin: divided in 1961, reunited in 1989, it has become Europe's most vibrant melting-pot of artists, immigrants and entrepreneurs. Blending memoir, history and reportage, this legendary Berliner takes us behind the scenes there - looking at everything from life under the Stasi and the difference between East and West Berliners' sex-lives to the city's night-life, politics and hidden quirks - and reveals what makes Berlin the uniquely fascinating place it is.

Ecological and philosophical themes dominate this collection of poems, which primarily features unrhymed verse but occasionally incorporates rhymed sections. The work draws inspiration from rap and popular music, blending styles to explore the complexities of unintended consequences in nature and society.

Miguel Angel Gordillo is the first person to circumnavigate the earth over both poles in a homebuilt aircraft under 1750 kg. In 2016, he completed 41,000 nm in extreme conditions, earning a world record. This book documents his scientific, aeronautical, and personal challenges through words and pictures.