Title: Exploring the Unknown
Subtitle: Selected Documents in the History of the United States Civil Space Program, V. 4
First published: 1999
Subjects: Long Now Manual for Civilization, NASA, Space, History, Remote sensing, Space exploration, Histories, Earth observations (From space), Management planning, Space transportation, NASA space programs, Economic impact, Space programs, Astronautics, Satellite communication, Space missions, Research and development, Space flight, Decision making