This challenging collection of problems is organized into seven carefully crafted, thoughtful chapters on the Sun and the nature of the solar system; the motion of the planets; the Sun, Earth, and Moon; the sky as observed from the rotating, revolving Earth; other planets, their satellites, their rings; asteroids, comets, and meteoroids; and the radiations and telescopes. From question 1, "List characteristics of the solar system that are major clues in devising a hypothesis of its origin and evolution," through question 924, "Give a brief list of the contributions of radio and radar technologies in lunar and planetary astronomy," the problems range in difficulty from ones requiring only simple knowledge to ones requiring significant understanding and analysis. Many of the answers, in turn, illuminate the questions by providing basic explanations of the concepts involved.

Pioneer 10 and 11 are now halfway to the edge of the solar system. All beginning and advanced students of astronomy and their instructors as well as all dedicated amateurs can join James Van Allen on this journey by exploring the questions and answers in this stimulating book.

Astrophysicist and space pioneer James Van Allen (1914–2006), for whom the Van Allen radiation belts were named, was among the principal scientific investigators for twenty-four space missions, including Explorer I in 1958, the first successful U.S. satellite; Mariner 2’s 1962 flyby of Venus, the first successful mission to another planet; and the 1970s Pioneer 10 and Pioneer 11 missions that surveyed Jupiter and Saturn. Although he retired as a University of Iowa professor of physics and astronomy in 1985, he remained an active researcher, using his campus office to monitor data from Pioneer 10—on course to reach the edge of the solar system when its signal was lost in 2003—until a short time before his death at the age of ninety-one. Now Abigail Foerstner blends space science drama, military agendas, cold war politics, and the events of Van Allen’s lengthy career to create the first biography of this highly influential physicist.

Drawing on Van Allen’s correspondence and publications, years of interviews with him as well as with more than a hundred other people, and declassified documents from such archives as the Jet Propulsion Laboratory, the Kennedy Space Center, and the Applied Physics Laboratory, Foerstner describes Van Allen’s life from his Iowa childhood to his ?rst experiments at White Sands to the years of Explorer I until his death in 2006.

Often called the father of space science, James Van Allen led the way to mapping a new solar system based on the solar wind, massive solar storms, and cosmic rays. Pioneer 10 alone sent him more than thirty years of readings that helped push our recognition of the boundary of the solar system billions of miles past Pluto. Abigail Foerstner’s compelling biography charts the eventful life and time of this trailblazing physicist.

Early in 1958, instruments on the space satellites Explorer I and Explorer III revealed the presence of radiation belts, enormous populations of energetic particles trapped in the magnetic field of the earth. Originally published in 1983 but long out of print until now, Origins of Magnetospheric Physics tells the story of this dramatic and hugely transformative period in scientific and Cold War history. Writing in an accessible style and drawing on personal journals, correspondence, published papers, and the recollections of colleagues, James Van Allen documents a trail-blazing era in space history