Kategoria BISAC: Science >> Time

Sundials, which decorate church walls, public plazas, and elegant gardens, are first and foremost astronomical instruments. Before understanding how sundials work, one must first understand the apparent motion of the Sun in the sky. In this book, Denis Savoie presents the basics of astronomy required to understand sundials and describes how to design and build your own classical sundial. Written to engage all levels of science readers, the author shows the calculations involved in the sundial's construction and also gives a comprehensive history of time measurement.

The...

Novelist, cultural commentator, memoirist, and historian Eva Hoffman examines our ever-changing perception of time in this inspired addition to the BIG IDEAS/small books series

Time has always been the great given, the element that establishes the governing facts of human fate that cannot be circumvented, deconstructed, or wished away. But these days we are tampering with time in ways that affect how we live, the textures of our experience, and our very sense of what it is to be human. What is the nature of time in our time? Why is it that even as we live longer than ever...

The simple question "How did the Maya come up with a calendar that had only 260 days?" led Vincent Malmstrom to discover an unexpected "hearth" of Mesoamerican culture. In this boldly revisionist book, he sets forth his challenging, new view of the origin and diffusion of Mesoamerican calendrical systems--the intellectual achievement that gave rise to Mesoamerican civilization and culture.

Malmstrom posits that the 260-day calendar marked the interval between passages of the sun at its zenith over Izapa, an ancient ceremonial center in the Soconusco region of Mexico's Pacific coastal...

Time surrounds us. It defines our experience of the world; it echoes through our every waking hour. Time is the very foundation of conscious experience. Yet as familiar as it is, time is also deeply mysterious. We cannot see, hear, smell, taste, or touch it. Yet we do feel it--or at least we think we feel it. No wonder poets, writers, philosophers, and scientists have grappled with time for centuries.

In his latest book, award-winning science writer Dan Falk chronicles the story of how humans have come to understand time over the millennia, and by drawing from the...

You are reading the word "now" right now. But what does that mean? What makes the ephemeral moment "now" so special? Its enigmatic character has bedeviled philosophers, priests, and modern-day physicists from Augustine to Einstein and beyond. Einstein showed that the flow of time is affected by both velocity and gravity, yet he despaired at his failure to explain the meaning of "now." Equally puzzling: why does time flow? Some physicists have given up trying to understand, and call the flow of time an illusion, but the eminent experimentalist physicist Richard A. Muller protests. He says...