With its "How Science Works" theme, 21st Century Astronomy emphasizes the process of scientific thinking and the relevance of scientific observations. The authors showcase the excitement of contemporary astronomy and encourage readers to consider both the methods and the goals of scientific research. Each text is packaged with a 21st Century Astronomy CD-ROM featuring interactive software and supplemental resources.
Jeff Hester is professor of physics and astronomy at Arizona State University. He studies the interstellar medium in the Milky Way and external galaxies, the structure of the diffuse ISM, and supernova remnants.
Bradford Smith, who studies solar system cosmogony and stellar astronomy, is affiliated with the Institute for Astronomy at the University of Hawaii.
George Blumenthal is professor of astronomy and astrophysics at the University of California, Santa Cruz. He studies a wide range of topics including cosmology, dark matter, and the origin of structure in the Universe.
Laura Kay is Ann Whitney Olin professor and chair of the Department of Physics and Astronomy at Barnard College, where she has taught since 1991. She received a BS degree in physics from Stanford University, and MS and PhD degrees in astronomy and astrophysics from the University of California– Santa Cruz. She studies active galactic nuclei, using ground-based and space telescopes. She teaches courses in astronomy, astrobiology, women and science, and polar exploration.
Howard Voss is professor of physics emeritus at Arizona State University and has been active in the American Association of Physics Teachers and the American Institute of Physics.