How Old Is the Universe? by Larry W. Swanson

Astronomers have definitively established the age of our universe at 13.7 billion years. But how did they arrive at such a precise figure? "How Old Is the Universe?" narrates the captivating tale of how astronomers deciphered one of the most compelling enigmas in scientific history. Along the way, readers are introduced to fundamental astronomical concepts and the latest breakthroughs in the field.

The question of the universe's age appears simple, yet its answer holds profound implications for science, religion, and philosophy. David Weintraub delves into the centuries-long journey undertaken by astronomers to unravel the mysteries of the cosmos. By chronicling the contributions of visionary thinkers whose collective discoveries unveiled a fundamental truth, Weintraub demonstrates how diverse lines of inquiry and meticulously gathered evidence, when interconnected like pieces of a cosmic puzzle, converged to reveal the sought-after solution. It's not mere belief but knowledge that the universe spans 13.7 billion years – a certainty readers will share upon delving into this book.

By focusing on this pivotal question about the universe and urging readers to grasp its answer, Weintraub acquaints them with the core ideas and phenomena of modern astronomy. From red giants and white dwarfs to cepheid variable stars, supernovae, galaxy clusters, gravitational lensing, dark matter, dark energy, and the universe's accelerating expansion, the book offers a comprehensive overview. Embracing a unique historical perspective on astronomy, "How Old Is the Universe?" illuminates the inner workings of scientific inquiry and reveals how astronomers wrestle with profound questions about the universe's physical nature.

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