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).
A new six-part epic covering the first year of service of the U.S.S. Enterprise-E, leading up to the events of the hit movie Star Trek: First Contact. The U.S.S. Enterprise-E has launched, with Captain Jean-Luc Picard in command. In addition to many familiar faces, the new ship also has some new crew members -- among them, conn officer Sean Hawk and security chief Linda Addison. But soon Picard is devastated to learn that there's a saboteur on board -- in the form of a changeling infiltrator from the Dominion! Picard and his crew must learn who the changeling replaced and stop it before it destroys the fleet's finest ship... A new eBook from the authors of Enigma Ship and Spin!
A guide to the British Royal Navy in the Napoleonic Age for fans of the Aubrey–Maturin series: “A gem of a book” (Minneapolis Star Tribune). What is a sand-grouse, and where does it live? What are the medical properties of lignum vitae, and how did Stephen Maturin use it to repair his viola? Who is Admiral Lord Keith, and why is his wife so friendly with Captain Jack Aubrey? More than any other contemporary author, Patrick O’Brian knew the past. His twenty Aubrey–Maturin novels, beginning with 1969’s Master and Commander, are distinguished by deep characterization, heart-stopping naval combat, and an attention to detail that enriches and enlivens his stories. In this revised edition of A Sea of Words, Dean King and his collaborators dive into Jack Aubrey’s world. In addition to their invaluable glossary, the authors provide essays on the age’s politics, naval medicine, and the many ships that Jack Aubrey sailed, sighted, and fought against. For both the curious fan and the O’Brian aficionado, A Sea of Words is an invaluable tome on the British Royal Navy.
Trinity remains ignorant of her creative potential as an artist. Her son Zeus loses himself in the attainment of corporate wealth and power. Feeling alone and confused, her grandson Enoch wanders displaced thirty years after the turn of this century, and only Trinity's secret wisdom can uncover Enoch's path towards enlightenment and subsequently restore a family torn apart by violence and fear. The Sea of Milk is a novel about a woman's fateful fall and her fulfilling rise. This is a story about the woman's son who attempts to conquer and control his environment in order to rid personal shame and suffering. This is a story about the woman's grandson who redeems his father and thus glorifies her. It is, most of all, a myth about living and dying and returning home.