Although less well known outside the field than Edwin Hubble, "Walter Baade" was arguably the most influential observational astronomer of the twentieth century. Written by a fellow astronomer deeply familiar with Baade and his work, this is the first biography of this major figure in American astronomy. In it, Donald Osterbrock suggests that Baade's greatest contribution to astrophysics was not, as is often contended, his revision of Hubble's distance and age scales for the universe. Rather, it was his discovery of two distinct stellar populations: old and young stars. This discovery opened wide the previously marginal fields of stellar and galactic evolution--research areas that would be among the most fertile and exciting in all of astrophysics for decades to come.

Baade was born, educated, and gained his early research experience in Germany. He came to the United States in 1931 as a staff member of Mount Wilson Observatory, which housed the world's largest telescope. There, he pioneered research on supernovae. With the 100-inch telescope, he studied globular clusters and the structure of the Milky Way, every step leading him closer to the population concept he discovered during the wartime years, when the skies of southern California were briefly darkened. Most Mount Wilson astronomers were working on weapons-development crash programs devoted to bringing Baade's native country to its knees, while he, formally an enemy alien in their midst, was confined to Los Angeles County but had almost unlimited use of the most powerful telescope in the world.

After his great discovery, Baade continued his research with the new 200-inch telescope at Palomar. Always respected and well liked, he became even more famous among astronomers as they shifted their research to the fields he had opened. Publicity-shy and seemingly unconcerned with publication, however, Baade's celebrity remained largely within the field. This accomplished biography at last introduces Baade--and his important work--to a wider public, including the newest generation of skywatchers.

This is the biography of James E. Keeler (1857–1900), a distinguished pioneer of astrophysics, the application of the methods of physics to understanding the nature of the stars, nebulae, planets, comets, and other objects that populate the universe. Keeler was an outstanding scientist, and his fellow astronomers and physicists at the end of the nineteenth century considered him the leading astronomical spectroscopist of his generation. His career was closely linked with that of George Ellery Hale, founder of Yerkes Observatory. Keeler himself was the first astronomer at Lick Observatory, and the story of his life tells much of the early history of these two early American ‘big-science’ research institutions.

Thoroughly revised, expanded and updated throughout, this new edition of Astrophysics of GaseousNebulae and Active Galactic Nuclei is a graduate-level text and reference book on gaseous nebulae, nova and supernova remnants, and the emission-line regions in Seyfert galaxies, radio galaxies, quasars, and other types of active galactic nuclei. Much of the new data and many of the new images are from the Hubble Space Telescope and some of the largest ground-based telescopes in the world. Two wholly new chapters have been added, one on infrared astronomy and the other on X-ray astronomy, reflecting the great advances in these fields. This new edition also contains two completely new appendices, one a long primer on the quantum-mechanical concepts used in the analysis of nebular emission-line spectra, and the other a briefer description of molecular spectra. Large amounts of new data on dust in nebulae and quasars, and the photo-dissociated regions containing neutral atoms, molecules, and dust within and around them, have also been added to the book. Thus, the previous edition of this classic text, which has been tried, tested, and widely used for thirty years, has now been succeeded by a new, revised, updated, larger edition, which will be valuable to anyone seriously interested in astrophysics.

What is the origin of the universe? How did life appear on Earth and why was much of that life destroyed at various times in Earth's history? In this book four noted scientists-physicist Alan H. Guth, astronomer George Wetherill, biologist Lynn Margulis, and paeleobiologist David Raup- propose answers to these questions, discussing the newest developments in some exciting areas of current research. "Comprises four excellent essays. . . . The authors of this book seek to elucidate the remote, unusual events that most influenced the history of the cosmos and the earth. They describe alternative models and the evidence on which these models are based."-Laurie R. Godfrey, Science Books and Films "For a scientist who specializes in cosmology and earth history, this book is a worthwhile documentation of the opinions of four very different scientists."-G. Ledyard Stebbins, BioScience "Beginning with a tracing of the universe back to its beginnings, this fascinating little book presents the current state of knowledge and recent theories relating to the origins of the universe, our earth and life on earth. The last chapter explores extinction in our geologic past. Written by distinguished scientists, all papers attempt to establish patterns that may characterize other planets as well as our own."-New Technical Books

This is a centennial study of Yerkes Observatory, built a century ago by the University of Chicago as one of America's first big science centres. The text describes the changing fortunes of the Observatory under its first three directors, and is illustrated with many archival photographs. Under its founder and first director, George Ellery Hale, Yerkes pioneered the new science of astrophysics. E.B. Frost, Hale's successor, allowed Yerkes to decline from 1904 to 1932, although it still trained rising young astronomers such as Edward Hubble. Finally, with the support of Robert M. Hutchins, the University of Chicago's "boy president", the "boy director" Otto Struve presided over Yerkes' revitalization in the 1930s and 1940s.

The world's first mountain-top observatory and America's first big-science research center, Lick Observatory exemplifies astronomy's dramatic development in the past century. A dedicated Confederate naval officer and his jack-of-all-trades foreman used the bequest of a miserly California eccentric to transform an isolated mountain peak into the world's premier research observatory. Its first staff included a director from West Point and three of the outstanding astronomers of their time. Since its dedication in 1888, Lick Observatory has been the site of many of the most important discoveries in astronomy. "Eye on the Sky" presents Lick Observatory from the point of view of the people who breathed life into its giant telescopes. Their community was both constant and constantly transformed, shaped by workers famous and unknown who made it their home. The authors also explain in terms anyone can understand the laboratory advances that were adapted to telescopes to make them more powerful, and the conceptual breakthroughs that discoveries at the telescope helped bring about. The men and women who went to the top of Mount Hamilton in search of greater knowledge of the skies helped to change our conception of the universe and our place in it . They were people with personal and political lives as well as scientific careers, and their story illuminates a time and a place where foundations were laid for the discoveries of the next century.