Breakthrough Propulsion Physics Program
The Breakthrough Propulsion Physics Project (BPP) was a research project funded by NASA from 1996 through 2002, to study various proposals for "revolutionary" methods of spacecraft propulsion which would require breakthroughs in physics before they could be realized, hence the name. During its six years, this program was funded with a total investment of $1.2 million.
Read more about Breakthrough Propulsion Physics Program: Diametrical, Disjunction, Pitch and Bias, Alcubierre, Differential Sail, Legacy
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