NASA NTRS · 19910012842
The 21st century propulsion
Abstract
The prediction of future space travel in the next millennium starts by examining the past and extrapolating into the far future. Goals for the 21st century include expanded space travel and establishment of permanent manned outposts, and representation of Lunar and Mars outposts as the most immediate future in space. Nuclear stage design/program considerations; launch considerations for manned Mars missions; and far future propulsion schemes are outlined.
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Haloulakos, V. E., Boehmer, C.. 1990-04-01. The 21st century propulsion. https://ntrs.nasa.gov/citations/19910012842
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