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The "gravity assist" concept has proven fundamental to exploring our "back yard" — the solar system. The technique has even been employed at least once to rescue an Earth-orbiting communications satellite whose launch vehicle failed to place it in its intended geosynchronous orbit.
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www2.jpl.nasa.gov/basics/grav/primer.html
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Gravity Assist Trajectories ... Voyager 2 Gravity Assist Velocity Changes ... In a gravity-assist trajectory, angular momentum is transferred from the orbiting planet to a spacecraft approaching from behind the planet in its progress about the sun.
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www2.jpl.nasa.gov/basics/bsf4-1.php
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When satellites go off to places like Jupiter or Saturn (or even out of the solar system), they follow crazy orbits. ... The idea behind a gravity assist is to use a planet's motion to accelerate a satellite. For example, a satellite heads toward Jupiter -- in the process, it accelerates because it is "falling toward"
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science.howstuffworks.com/question102.htm
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Satellite Orbits - Gravitational Assist from Planets ... This orbit follows an elliptical orbit around the Sun. The planet does not interact with the probe until it approaches close enough for the planet's gravity to be stronger than that of the Sun's. This region is called the "Sphere of Influence".
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www.go.ednet.ns.ca/~larry/orbits/gravasst/gravasst.html
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Question: What is the principle behind the "gravity assist" that they used to get the Galileo probe to Jupiter? It seems that one would lose all the energy one gained falling by climbing away from the gravity source.
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www.newton.dep.anl.gov/askasci/ast99/ast99009.htm
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The Creation of a new Theory of Space Travel -- Gravity Propelled Space Travel ... And there are other gravity-assist missions to small bodies such as comets and asteroids in various stages of planning.
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www.gravityassist.com/
www.gravityassist.com/
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'Fly-bys', or 'gravity assist' manoeuvres, are now a standard part of spaceflight and are used by almost all ESA interplanetary missions. ... 'Fly-bys', or 'gravity assist' manoeuvres, are now a standard part of spaceflight and are used by almost all ESA interplanetary missions. Imagine if every time you drove by a city,
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www.esa.int/esaCP/SEMXLE0P4HD_index_0.html
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Gravity assist primer ... History of gravity assist in science and science fiction ... A gravity assist with Jupiter involves not a stationary planet as considered above, but a planet with enormous angular momentum as it revolves around the Sun. In the diagram at right, Jupiter's motion along its solar orbit has been...
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www.daviddarling.info/encyclopedia/G/gravityassist.html
www.daviddarling.info/encyclopedia/G/gravityassist.html
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