This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Wonders Of The Universe Interplanetary Mission And Propulsion
Dr J M Levitt of the Fels Planetarium outlines Mars exploration as the next major space goal after lunar landing. He notes a nuclear propulsion system is essential for a manned Mars mission, as chemical propulsion would require an impractically large rocket, with eight men needing about 2210 tons launch mass in favorable years.
MENTIONED IN THIS ARTICLE
J. M. Levitt
Fels Planetarium
Franklin Institute
Mars
Red Planet
Harry 0. Ruppe
Future Projects Office
Marshall Space Flight Center
Decatur Daily
Ruppe
N.A.S.A