A Ray of Light in a Sea of Dark Matter
A Ray of Light in a Sea of Dark Matter

Author: Charles Keeton

Publisher: Rutgers University Press

Published: 2014-04-30

Total Pages: 112

ISBN-13: 0813572126

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What’s in the dark? Countless generations have gazed up at the night sky and asked this question—the same question that cosmologists ask themselves as they study the universe. The answer turns out to be surprising and rich. The space between stars is filled with an exotic substance called “dark matter” that exerts gravity but does not emit, absorb, or reflect light. The space between galaxies is rife with “dark energy” that creates a sort of cosmic antigravity causing the expansion of the universe to accelerate. Together, dark matter and dark energy account for 95 percent of the content of the universe. News reporters and science journalists routinely talk about these findings using terms that they assume we have a working knowledge of, but do you really understand how astronomers arrive at their findings or what it all means? Cosmologists face a conundrum: how can we study substances we cannot see, let alone manipulate? A powerful approach is to observe objects whose motion is influenced by gravity. Einstein predicted that gravity can act like a lens to bend light. Today we see hundreds of cases of this—instances where the gravity of a distant galaxy distorts our view of a more distant object, creating multiple images or spectacular arcs on the sky. Gravitational lensing is now a key part of the international quest to understand the invisible substance that surrounds us, penetrates us, and binds the universe together. A Ray of Light in a Sea of Dark Matter offers readers a concise, accessible explanation of how astronomers probe dark matter. Readers quickly gain an understanding of what might be out there, how scientists arrive at their findings, and why this research is important to us. Engaging and insightful, Charles Keeton gives everyone an opportunity to be an active learner and listener in our ever-expanding universe. Watch a video with Charles Keeton: Watch video now. (http://www.youtube.com/watch?v=Uc3byXNS1G0).

Shamanic and Mythic Cultures of Ethnic Peoples in Northern China
Shamanic and Mythic Cultures of Ethnic Peoples in Northern China

Author: Fu Yuguang

Publisher: Routledge

Published: 2021-04-14

Total Pages: 327

ISBN-13: 1000319776

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Based on first-hand materials gathered through decades of field research and fleshed out with the author's insightful religious, cultural, and historical observations extending back to Qing Dynasty times, ancient archaeological discoveries and the legacy of Siberian peoples, this two-volume ethnological study investigates shamanic rituals, myths and lore in northern China and explores the common ideology underlying the origins of the region's cultures. The two volumes discuss the spiritual world of northern Shamanism and investigates the various shamanic rituals, divination, spirit idols and myths, illuminating how worship and ideas are imbedded in and interweave with the indigenous environment, culture and history of people in northern China. This mythic heritage embodies the peoples' understanding of the natural world, the creation of humankind, social life and history as well as their interaction with their surroundings. It is shown that shamanic spirituality in northern China is characterised by functionality and practicality in daily-life situations, in contrast to the received wisdom that defines shamanic praxis as a pure supernatural spirit journey. The set will be of great value for scholars of religion and anthropologists as well as ethnologists in the fields of Shamanism studies, Northeast Asian folklore and Manchu studies.