Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015 Task Group on Planetary and Lunar ... At Eartha#39;s center is a metallic core, largely fluid and in convective motion, but with a small solid inner core. The core anbsp;...
Title | : | Planetary and Lunar Exploration |
Author | : | Task Group on Planetary and Lunar Exploration, Space Science Board, Division on Engineering and Physical Sciences, National Research Council |
Publisher | : | National Academies Press - 1988-01-15 |
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