Three Steps To The Edge Of The Universe

If scientists can’t touch the Sun, how do they know what it’s made of? And if we can’t see black holes, how can we be confident they exist? Gravitational physicist David Garfinkle and his brother, science fiction writer Richard Garfinkle, tackle these questions and more in Three Steps to the Universe, a tour through some of the most complex phenomena in the cosmos and an accessible exploration of how scientists acquire knowledge about the universe through observation, indirect detection, and theory. The authors begin by inviting readers to step away from the Earth and reconsider our Sun. What we can directly observe of this star is limited to its surface, but with the advent of telescopes and spectroscopy, scientists know more than ever about its physical characteristics, origins, and projected lifetime. From the Sun, the authors journey further out into space to explore black holes. The Garfinkle brothers explain that our understanding of these astronomical oddities began in theory, and growing mathematical and physical evidence has unexpectedly supported it. From black holes, the authors lead us further into the unknown, to the dark matter and energy that pervade our universe, where science teeters on the edge of theory and discovery. Returning from the depths of space, the final section of the book brings the reader back down to Earth for a final look at the practice of science, ending with a practical guide to discerning real science from pseudoscience among the cacophony of print and online scientific sources. Three Steps to the Universe will reward anyone interested in learning more about the universe around us and shows how scientists uncover its mysteries.

Exquisite expositions of mathematics taken from the first ten years of the Math Horizons magazine.

From the author of We Are the Ants comes “another winner” (Booklist, starred review) about a boy who believes the universe is slowly shrinking as the things he remembers are being erased from others’ memories. Tommy and Ozzie have been best friends since the second grade, and boyfriends since eighth. They spent countless days dreaming of escaping their small town—and then Tommy vanished. More accurately, he ceased to exist, erased from the minds and memories of everyone who knew him. Everyone except Ozzie. Ozzie doesn’t know how to navigate life without Tommy, and soon he suspects that something else is going on: that the universe is shrinking. When Ozzie is paired up with the reclusive and secretive Calvin for a physics project, it’s hard for him to deny the feelings developing between them, even if he still loves Tommy. But Ozzie knows there isn’t much time left to find Tommy—that once the door closes, it can’t be opened again. And he’s determined to keep it open as long as possible.

An accessible look at the mysteries that lurk at the edge of the known universe and beyond The observable universe, the part we can see with telescopes, is incredibly vast. Yet recent theories suggest that there is far more to the universe than what our instruments record—in fact, it could be infinite. Colossal flows of galaxies, large empty regions called voids, and other unexplained phenomena offer clues that our own "bubble universe" could be part of a greater realm called the multiverse. How big is the observable universe? What it is made of? What lies beyond it? Was there a time before the Big Bang? Could space have unseen dimensions? In this book, physicist and science writer Paul Halpern explains what we know?and what we hope to soon find out?about our extraordinary cosmos. Explains what we know about the Big Bang, the accelerating universe, dark energy, dark flow, and dark matter to examine some of the theories about the content of the universe and why its edge is getting farther away from us faster Explores the idea that the observable universe could be a hologram and that everything that happens within it might be written on its edge Written by physicist and popular science writer Paul Halpern, whose other books include Collider: The Search for the World's Smallest Particles, and What's Science Ever Done For Us: What the Simpsons Can Teach Us About Physics, Robots, Life, and the Universe

Is the Christian faith something that can peacefully exist alongside all the other aspects of an ordinary human life, or does it by its very nature turn that life into something else? The author of this book, a member of a monastic community for over forty years, obviously has a vested interest in the answer. But even for believers caught up in the day-to-day life of society, work, and family, the question is an important one, at least if they are seeking a measure of consistency in the life they are living. And does not the very fact that the question of the importance and urgency of faith needs to be asked witness to the eclipse of an eschatological outlook among Christians, at any rate in the mainstream Churches? Could this oversight not explain why an eschatological understanding of faith, one which sees it as a radical, world-changing reality, has been forced to take refuge, often deformed to the point of being unrecognizable, in small “fanatical” groups on the margins of the Christian world?

The Questions Would Teach Her More Than the Answers It wasn’t long after arriving in Oxford for graduate school that twenty-two-year-old Andrea Lucado – preacher’s daughter from Texas - faced not only culture shock, a severe lack of coffee, but also some unexpected hard questions: Who am I? Who is God? Why do I believe what I believe? “So many nights in Oxford, I felt like the details of my faiths were getting fuzzier. Nights turned restless with the questions and the thoughts. I questioned God’s existence and the doubt, it was getting into my bones….” In this engaging memoir, Andrea speaks to all of us who wrestle with faith, doubt, and spiritual identity. Join Andrea as she navigates the Thames River, the Oxford Atheist Society, romance in ancient pubs—and a new perspective on who God is. As Andrea learned, sometimes it takes letting go of old ideas to discover lasting truth.