United States. National Aeronautics and Space Administration. Education Programs Division]]> University of Colorado]]> Skylab Program]]> Science—Study and teaching]]> Earth Resources Program]]> Experimentation]]> Apollo Telescope Mount]]> Multiple docking adapters]]> Airlock modules]]> Space habitats]]> Extravehicular mobility units]]> United States. National Aeronautics and Space Administration]]> en]]> Workbooks]]> Text]]> 1970-1979]]>