Astronomy and Astrophysics : Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 To 2015

This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files. Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution. Task Group On Astronomy And Astrophysics, Space Science Board, Commission On Physical Sciences, Mathematics, And Resources, National Research Council. Task Group Chairman : Bernard Burke. Support For The Project Provided By The National Aeronautics And Space Administration. Overview Astronomy and astrophysics Fundamental physics and chemistry Life sciences Mission to planet Earth Planetary and lunar exploration Solar and space physics. Support for this project was provided by Contract NASW-3482 between the National Academy of Sciences and the National Aeronautics and Space Administration.