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The story of physicists' quest to answer a mind-boggling question: How can we travel through time? Since H. G. Wells' 1895 classic The Time Machine, readers of science fiction have puzzled over the paradoxes of time travel. What would happen if a time traveler tried to change history? Would some force or law of nature prevent him? Or would his action produce a "new" history, branching away from the original?In the last decade of the twentieth century a group of theoretical physicists at the California Institute of Technology undertook a serious investigation of the possibility of pastward time travel, inspiring a serious and sustained study that engaged more than thirty physicists working at universities and institutes around the world.Many of the figures involved are familiar: Einstein, Stephen Hawking and Kip Thorne; others are names known mostly to physicists. These are the new time travelers, and this is the story of their work--a profoundly human endeavor marked by advances, retreats, and no small share of surprises. It is a fantastic journey to the frontiers of physics. Some images in the ebook are not displayed owing to permissions issues.
The bubbles were swirling all around me, massaging my body. As I luxuriated in this fantastic bath, I gasped realizing that those bubbles carried with them miniature galaxies bringing the entire Cosmos into my bathtub... Alfie is back. And so are George and other characters from the author’s previous book Einstein’s Enigma or Black Holes in My Bubble Bath. While the present book, Universe Unveiled - The Cosmos in My Bubble Bath, is completely independent, its storyline can be considered a sequel to the previous one. The scientific content spanning ancient world models to the most recent mysteries of cosmology is presented in an entirely nontechnical and descriptive style through the discussions between Alfie, the enlightened learner, and George, professor of astrophysics. Fantasies, based on these discussions that cover the scientific facts, are created by the magical bubble baths taken by Alfie. Universe Unveiled blends accurate science with philosophy, drama, humour, and fantasy to create an exciting cosmic journey that reads like a novel and educates as it entertains. “Spurred by a series of mind-bending discoveries, Man’s millennial love affair with the stars has now reached fever pitch. No one writing today is better positioned to evoke the romance and beauty of these cosmic discoveries than Vishveshwara. A leading expert in Einstein’s relativity theory, he brings a lyrical voice and a poetic sensibility to this joyful task. Universe Unveiled, a unique literary creation, transports readers into believing they can actually hear the music of the spheres.” Professor Robert Fuller, Former President, Oberlin College (USA) Author of Somebodies and Nobodies: Overcoming the Abuse of Rank
For centuries humankind has fantasized about life on Mars, whether it’s intelligent Martian life invading our planet (immortalized in H.G. Wells’s The War of the Worlds) or humanity colonizing Mars (the late Ray Bradbury’s The Martian Chronicles). The Red Planet’s proximity and likeness to Earth make it a magnet for our collective imagination. Yet the question of whether life exists on Mars—or has ever existed there—remains an open one. Science has not caught up to science fiction—at least not yet. This summer we will be one step closer to finding the answer. On August 5th, Curiosity—a one-ton, Mini Cooper-sized nuclear-powered rover—is scheduled to land on Mars, with the primary mission of determining whether the red planet has ever been physically capable of supporting life. In Getting to Mars, Roger Wiens, the principal investigator for the ChemCam instrument on the rover—the main tool for measuring Mars’s past habitability—will tell the unlikely story of the development of this payload and rover now blasting towards a planet 354 million miles from Earth. ChemCam (short for Chemistry and Camera) is an instrument onboard the Curiosity designed to vaporize and measure the chemical makeup of Martian rocks. Different elements give off uniquely colored light when zapped with a laser; the light is then read by the instrument’s spectrometer and identified. The idea is to use ChemCam to detect life-supporting elements such as carbon, nitrogen, and oxygen to evaluate whether conditions on Mars have ever been favorable for microbial life. This is not only an inside story about sending fantastic lasers to Mars, however. It’s the story of a new era in space exploration. Starting with NASA’s introduction of the Discovery Program in 1992, smaller, scrappier, more nimble missions won out as behemoth manned projects went extinct. This strategic shift presented huge opportunities—but also presented huge risks for shutdown and failure. And as Wiens recounts, his project came close to being closed down on numerous occasions. Getting to Mars is the inspiring account of how Wiens and his team overcame incredible challenges—logistical, financial, and political—to successfully launch a rover in an effort to answer the eternal question: is there life on Mars?
The Lord of Uraniborg is a comprehensive biography of Tycho Brahe, father of modern astronomy, famed alchemist and littérateur of the sixteenth-century Danish Renaissance. Written in a lively and engaging style, Victor Thoren's biography offers interesting perspectives on Tycho's life and presents alternative analyses of virtually every aspect of his scientific work. A range of readers interested in astronomy, history of astronomy and the history of science will find this book fascinating.
This book is an exploration of the countless secrets of the universe that God has revealed in Holy Quran more than 1400 years ago. It seeks in a very modest and humble manner to draw you into a journey to uncover some of the awe and splendor of this divine miraculous Scripture. Step in line with the author and walk through the many sacred revelations that have amazingly been encased within the scientific facts, which were yet to be discovered far later in the modern era.
" ... 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.
Concise field guide to stars and constellations presented in a month-by-month selection of stars charts. Explains celestial phenomena, workings. A gem.