Encyclopedia Astronautica
Lagrangian Interplanetary Shuttle Vehicle

Credit: NASA
American manned Mars expedition. Study 1985. A Lagrangian approach to Mars exploration was proposed in June 1985. This would use the L1 sunward point of equal Earth/Moon/Sun gravity to assemble and refuel a large Interplanetary Shuttle Vehicle spacecraft.

After being boarded by a crew brought up from earth in a small shuttle, the ISV would maneuver into a series of moon/earth flybys. These would be used to sling the spacecraft toward Mars with minimal propellant expenditure. A further modest propulsive burn would park the ISV at the Mars/Sun L1 point. Such a reusable Interplanetary Shuttle Vehicle would provide a home for astronauts on the voyage to Mars and back, and be more flexible than the Mars Cycler concepts, at the expense of a modest propellant requirement. The concept was demonstrated using the ISEE-3 satellite in 1998.

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Associated Countries
See also
  • Mars Expeditions Since Wernher von Braun first sketched out his Marsprojekt in 1946, a succession of designs and mission profiles were seriously studied in the United States and the Soviet Union. By the late 1960's Von Braun had come to favour nuclear thermal rocket powered expeditions, while his Soviet counterpart Korolev decided that nuclear electric propulsion was the way to go. All such work stopped in both countries in the 1970's, after the cancellation of the Apollo program in the United States and the N1 booster in the Soviet Union. More...

Associated Manufacturers and Agencies
  • NASA American agency overseeing development of rockets and spacecraft. National Aeronautics and Space Administration, USA, USA. More...

  • Portree, David S. F., Humans to Mars: Fifty Years of Mission Planning, 1950 - 2000, NASA Monographs in Aerospace History Series, Number 21, February 2001.

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