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Originally Posted by Wally
Isn't escape velocity just the speed needed get you away from a body at a velocity to where the gravitational affects of the body decrease at a greater rate than the speed of the craft itself, hense it'll never be pulled back?
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Absolutely. The amount of this force is calculated by the inverse square law. The measured acceleration of the Pioneer Probes towards the sun was in the ballpark of twice what Kepler's or Newtons laws would predict. The consistancy of this 'error' rules out a lot of possible causes, and has left everyone scratching their heads.