A Ray of Light in a Sea of Dark Matter PDF Download
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Author: Charles Keeton
Publisher: Rutgers University Press
ISBN: 0813572126
Category : Science
Languages : en
Pages : 112
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Book Description
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).
Author: Charles Keeton
Publisher: Rutgers University Press
ISBN: 0813572126
Category : Science
Languages : en
Pages : 112
Get Book Here
Book Description
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).
Author: United States. Congress. Joint Committee on Atomic Energy
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 186
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Book Description
Author: Charles Liu
Publisher:
ISBN: 1782408509
Category : Nature
Languages : en
Pages : 163
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Book Description
The universe literally encompasses everything we were, are and will be, everything we knew, know and can know. When we decide to understand the universe as a whole, new truths come to light, and unexpected perspectives illuminate our take on life. 30-Second Universe explains all the tantalising concepts, principles and theories that make up our knowledge - the Higgs particle, gluons, quarks, the multiverse, how certainty itself can be uncertain, and of course, where our world came from, and where we're going and what will happen in the end - and it explains these astrophysical answers succinctly, each entry taking only 30 seconds to read, with further exploration flagged, and key scientists noted. This one small book sheds light on the biggest ideas, concepts and discoveries in life, in the universe, in everything.
Author: Michael R. Molnar
Publisher:
ISBN: 9780813564715
Category : Religion
Languages : en
Pages : 187
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Book Description
Tracing the possible origins of the Magi's star, the author uses an ancient Roman coin as a starting point to investigate the possibility that the legendary star may in fact have been an eclipse of Jupiter and the star Aries.
Author: Robert D. Purrington
Publisher: Rutgers University Press
ISBN: 9780813524429
Category : Medical
Languages : en
Pages : 276
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Book Description
Putting physics into the historical context of the Industrial Revolution and the European nation-state, Purrington traces the main figures, including Faraday, Maxwell, Kelvin, and Helmholtz, as well as their interactions, experiments, discoveries, and debates. The success of nineteenth-century physics laid the foundation for quantum theory and relativity in the twentieth. Robert D. Purrington is a professor of physics at Tulane University and coauthor of Frame of the Universe.
Author: Gerald James Holton
Publisher: Rutgers University Press
ISBN: 9780813529080
Category : Science
Languages : en
Pages : 604
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Book Description
Of Some Trigonometric Relations -- Vector Algebra.
Author: Jorge Cham
Publisher: Penguin
ISBN: 0735211523
Category : Science
Languages : en
Pages : 369
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Book Description
Prepare to learn everything we still don’t know about our strange and mysterious universe Humanity's understanding of the physical world is full of gaps. Not tiny little gaps you can safely ignore —there are huge yawning voids in our basic notions of how the world works. PHD Comics creator Jorge Cham and particle physicist Daniel Whiteson have teamed up to explore everything we don't know about the universe: the enormous holes in our knowledge of the cosmos. Armed with their popular infographics, cartoons, and unusually entertaining and lucid explanations of science, they give us the best answers currently available for a lot of questions that are still perplexing scientists, including: * Why does the universe have a speed limit? * Why aren't we all made of antimatter? * What (or who) is attacking Earth with tiny, superfast particles? * What is dark matter, and why does it keep ignoring us? It turns out the universe is full of weird things that don't make any sense. But Cham and Whiteson make a compelling case that the questions we can't answer are as interesting as the ones we can. This fully illustrated introduction to the biggest mysteries in physics also helpfully demystifies many complicated things we do know about, from quarks and neutrinos to gravitational waves and exploding black holes. With equal doses of humor and delight, Cham and Whiteson invite us to see the universe as a possibly boundless expanse of uncharted territory that's still ours to explore.
Author: Jo Dunkley
Publisher: Belknap Press
ISBN: 0674984285
Category : Science
Languages : en
Pages : 311
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Book Description
A BBC Sky at Night Best Astronomy and Space Book of the Year “[A] luminous guide to the cosmos...Jo Dunkley swoops from Earth to the observable limits, then explores stellar life cycles, dark matter, cosmic evolution and the soup-to-nuts history of the Universe.” —Nature “A grand tour of space and time, from our nearest planetary neighbors to the edge of the observable Universe...If you feel like refreshing your background knowledge...this little gem certainly won’t disappoint.” —Govert Schilling, BBC Sky at Night Most of us have heard of black holes and supernovas, galaxies and the Big Bang. But few understand more than the bare facts about the universe we call home. What is really out there? How did it all begin? Where are we going? Jo Dunkley begins in Earth’s neighborhood, explaining the nature of the Solar System, the stars in our night sky, and the Milky Way. She traces the evolution of the universe from the Big Bang fourteen billion years ago, past the birth of the Sun and our planets, to today and beyond. She then explains cutting-edge debates about such perplexing phenomena as the accelerating expansion of the universe and the possibility that our universe is only one of many. Our Universe conveys with authority and grace the thrill of scientific discovery and a contagious enthusiasm for the endless wonders of space-time.
Author: Anthony C. Phillips
Publisher:
ISBN:
Category : Astrophysics
Languages : en
Pages : 246
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Book Description
Author: John Barrow
Publisher: Vintage
ISBN: 0307555356
Category : Science
Languages : en
Pages : 370
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Book Description
Reality as we know it is bound by a set of constants—numbers and values that dictate the strengths of forces like gravity, the speed of light, and the masses of elementary particles. In The Constants of Nature, Cambridge Professor and bestselling author John D.Barrow takes us on an exploration of these governing principles. Drawing on physicists such as Einstein and Planck, Barrow illustrates with stunning clarity our dependence on the steadfastness of these principles. But he also suggests that the basic forces may have been radically different during the universe’s infancy, and suggests that they may continue a deeply hidden evolution. Perhaps most tantalizingly, Barrow theorizes about the realities that might one day be found in a universe with different parameters than our own.
