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The Extravagant Universe: Exploding Stars, Dark Energy, and the Accelerating Cosmos (Princeton Science Library, 45),Used
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The Extravagant Universe tells the story of a remarkable adventure of scientific discovery. One of the world's leading astronomers, Robert Kirshner, takes readers inside a lively research team on the quest that led them to an extraordinary cosmological discovery: the expansion of the universe is accelerating under the influence of a dark energy that makes space itself expand. In addition to sharing the story of this exciting discovery, Kirshner also brings the science uptodate in a new epilogue. He explains how the idea of an accelerating universeonce a daring interpretation of sketchy datais now the standard assumption in cosmology today.This measurement of dark energya quality of space itself that causes cosmic accelerationpoints to a gaping hole in our understanding of fundamental physics. In 1917, Einstein proposed the 'cosmological constant' to explain a static universe. When observations proved that the universe was expanding, he cast this early form of dark energy aside. But recent observations described firsthand in this book show that the cosmological constantor something just like itdominates the universe's mass and energy budget and determines its fate and shape.Warned by Einstein's blunder, and contradicted by the initial results of a competing research team, Kirshner and his colleagues were reluctant to accept their own result. But, convinced by evidence built on their hardearned understanding of exploding stars, they announced their conclusion that the universe is accelerating in February 1998. Other lines of inquiry and parallel supernova research now support a new synthesis of a cosmos dominated by dark energy but also containing several forms of dark matter. We live in an extravagant universe with a surprising number of essential ingredients: the real universe we measure is not the simplest one we could imagine.
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