Interstellar travel
OverviewPropulsionChallengesProposed methodsDesigns and studiesNon-profit organizationsFeasibilityDiscovery of Earth-like planets
According to physicist Michio Kaku, although chemical rocket engines have a thrust of several thousand tons, they operate only for a few minutes, so in terms of final acceleration they are inferior, for example, to ion engines with low thrust and a lifespan of several years, but ion thruster and plasma engines are too weak for human flight to the stars. The most advanced electric rocket engines available today have a characteristic velocity