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Interplanetary spaceflight |
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Interplanetary travel is travel between planets in a single planetary system. In practice, the term is limited to travel between the planets of the solar system.
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There are currently many achievements in interplanetary travel. Pioneer 10, Pioneer 11, Voyager 1 and Voyager 2 are on course to leave the solar system. No manned missions have been sent to any other planet of the Solar System. An earlier project which received some significant planning by NASA included a manned fly-by of Venus in the Manned Venus Flyby mission, but was cancelled when the Apollo Applications Program was terminated due to NASA budget cuts in the late 1960s.
The new economic travel techniques include Hohmann transfers, gravitational slingshot, fuzzy orbits and aerobraking. The improved rocket concepts include electric propulsion, fission powered rockets, fusion rockets and nuclear rockets.
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