A historical review of the theory of gravity-assists in the pre-spaceflight era

  title={A historical review of the theory of gravity-assists in the pre-spaceflight era},
  author={Rodolfo Batista Negri and Antonio Fernando Bertachini de Almeida Prado},
  journal={Journal of the Brazilian Society of Mechanical Sciences and Engineering},
  • R. B. NegriA. Prado
  • Published 14 July 2020
  • Physics
  • Journal of the Brazilian Society of Mechanical Sciences and Engineering
The gravity-assist manoeuvre is a technique in which a spacecraft changes its orbital energy and angular momentum by a close-approach with a celestial body. The result is a great reduction in the use of fuel and flight time. Several interplanetary missions have applied it for this reason, like the famous Voyagers, Mariner, or Galileo. The astronomers knew the mechanics behind such concept for at least two centuries by noting the change in the orbits of the comets after passing close to Jupiter… 
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