Re: Gravity Assist?

From: Jim King (
Date: Fri Aug 26 2005 - 16:18:30 EDT

  • Next message: Allen Thomson: "Re: Gravity Assist?"

    Try this Wikipedia article:
    Jeff Umbarger wrote:
    >Hey All,
    >     I know that this is somewhat off thread but can
    >someone explain how a planet can "slingshot" a
    >satellite that has come near it at a *higher* velocity
    >than before the satellite reached the planet? Here is
    >where I struggle with this idea: if satellite is
    >approaching a planet, then that planets gravity should
    >begin to accelerate that satellite towards it. But as
    >the satellite *departs* the planet after making
    >closest approach that same gravity should decelerate
    >the satellite by just as much - with no net positive
    >gain, right???
    >     Regards,
    >          Jeff Umbarger
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