Our true origins are not only human, or even terrestrial, but in fact cosmic. Drawing on recent scientific breakthroughs and cross-pollination among geology, biology, astrophysics and cosmology, Origins illuminates the soul-stirring leaps in our understanding of the cosmos. This newly revised and updated edition features such startling discoveries as the more than 5,000 newly detected exoplanets that shed light on the origins of and possibilities for life in the cosmos, and data from a host of new ground-based and spaceborne observatories that has fundamentally changed what we know about the expanding universe-and maybe even the laws of physics. From the first image of a galaxy's birth to tantalising evidence of water not only on Mars but also on the asteroid Ceres, as well as moons of Jupiter and Saturn, coauthors Neil deGrasse Tyson and Donald Goldsmith conduct an exhilarating tour of the cosmos with clarity and exuberance.

A History Today Book of the Year A world-renowned astronomer and an esteemed science writer make the provocative argument for space exploration without astronauts. Human journeys into space fill us with wonder. But the thrill of space travel for astronauts comes at enormous expense and is fraught with peril. As our robot explorers grow more competent, governments and corporations must ask, does our desire to send astronauts to the Moon and Mars justify the cost and danger? Donald Goldsmith and Martin Rees believe that beyond low-Earth orbit, space exploration should proceed without humans. In The End of Astronauts, Goldsmith and Rees weigh the benefits and risks of human exploration across the solar system. In space humans require air, food, and water, along with protection from potentially deadly radiation and high-energy particles, at a cost of more than ten times that of robotic exploration. Meanwhile, automated explorers have demonstrated the ability to investigate planetary surfaces efficiently and effectively, operating autonomously or under direction from Earth. Although Goldsmith and Rees are alert to the limits of artificial intelligence, they know that our robots steadily improve, while our bodies do not. Today a robot cannot equal a geologist's expertise, but by the time we land a geologist on Mars, this advantage will diminish significantly. Decades of research and experience, together with interviews with scientific authorities and former astronauts, offer convincing arguments that robots represent the future of space exploration. The End of Astronauts also examines how spacefaring AI might be regulated as corporations race to privatize the stars. We may eventually decide that humans belong in space despite the dangers and expense, but their paths will follow routes set by robots.

"How do alien, faraway worlds reveal their existence to Earthlings? Let Donald Goldsmith count the ways. As an experienced astronomer and a gifted storyteller, he is the perfect person to chronicle the ongoing hunt for planets of other stars." -Dava Sobel Astronomers have recently discovered thousands of planets that orbit stars throughout our Milky Way galaxy. With his characteristic wit and style, Donald Goldsmith presents the science of exoplanets and the search for extraterrestrial life in a way that Earthlings with little background in astronomy or astrophysics can understand and enjoy. Much of what has captured the imagination of planetary scientists and the public is the unexpected strangeness of these distant worlds, which bear little resemblance to the planets in our solar system. The sizes, masses, and orbits of exoplanets detected so far raise new questions about how planets form and evolve. Still more tantalizing are the efforts to determine which exoplanets might support life. Astronomers are steadily improving their means of examining these planets' atmospheres and surfaces, with the help of advanced spacecraft sent into orbits a million miles from Earth. These instruments will provide better observations of planetary systems in orbit around the dim red stars that throng the Milky Way. Previously spurned as too faint to support life, these cool stars turn out to possess myriad planets nestled close enough to maintain Earthlike temperatures. The quest to find other worlds brims with possibility. Exoplanets shows how astronomers have broadened our planetary horizons, and suggests what may come next, including the ultimate discovery: life beyond our home planet.

Our true origins are not just human, or even terrestrial, but in fact cosmic. Drawing on recent scientific breakthroughs and the current cross-pollination among geology, biology, astrophysics, and cosmology, ?Origins? explains the soul-stirring leaps in our understanding of the cosmos. From the first image of a galaxy birth to Spirit Rover's exploration of Mars, to the discovery of water on one of Jupiter's moons, coauthors Neil deGrasse Tyson and Donald Goldsmith conduct a galvanizing tour of the cosmos with clarity and exuberance.

Albert Einstein has been named the most important man of the twentieth century. As we look to understand the true nature of the universe with technological tools that weren't even dreamed of in his lifetime, Einstein's formulae remain our best key for decoding it. Einstein 101 explores both his work and his life-public and private. It also features a fascinating plain-language exploration of his famous "thought experiments," which explain how this extraordinary thinker visualized complex concepts. Accessible to all adults interested in the man, his life, and his work. Dr Donald Goldsmith is the winner of, among many other awards, the 1990 Astronomical Society of the Pacific's Award for Lifetime Achievement in the popularization of astronomy. He won the Physics Science Writing Award in 1986 for Nemesis: The Deathstar and Other Theories of Mass Extinction. Robert Libbon is a veteran writer with a degree in European history. His survey of Instant European History was published in 1996 by Fawcett Books.

The Big Bang: A Big Bust? The cosmos seems to be in crisis, and you don't have to be a rocket scientist to see it. How, for instance, can the universe be full of stars far older than itself? How could space have once expanded faster than the speed of light? How can most of the matter in the universe be "missing"? And what kind of truly weird matter could possibly account for ninety percent of the universe's total mass? This brief and witty book, by the award-winning science writer Donald Goldsmith, takes on these and other key questions about the origin and evolution of the cosmos. By clearly laying out what we currently know about the universe as a whole, Goldsmith lets us see firsthand, and judge for ourselves, whether modern cosmology is in a state of crisis. Einstein's Greatest Blunder? puts the biggest subject of all-the story of the universe as scientists understand it-within the grasp of English-speaking earthlings. When Albert Einstein confronted a cosmological contradiction, in 1917, his solution was to introduce a new term, the "cosmological constant." For a time, this mathematical invention solved discrepancies between his model and the best observations available, but years later Einstein called it the "greatest blunder" of his career. And yet the cosmological constant is still alive today-it is one of the "fudge factors" employed by cosmologists to make their calculations fit the observational data. Theoretical cosmologists, shows Goldsmith, continually reshape their models in an honest (if sometimes futile) effort to explain apparent chaos as cosmic harmony-whether their specific concern is the age and expansion rate of the cosmos, hot versus cold "dark matter," the inflationary theory of the big bang, the explanation of large-scale structure, or the density and future of the universe. Engagingly written and richly illustrated with photographs taken by the Hubble Space Telescope, Einstein's Greatest Blunder? is a feast for the eye and mind.