[time-nuts] Pendulums & Atomic Clocks & Gravity
didier at cox.net
Sun May 27 10:54:28 EDT 2007
For the same reason that a satellite in free fall is still subject to
gravitational forces, so do objects in Lagrange points. These points
represent areas where the centrifugal forces compensate for gravity from
two objects instead of one for a regular satellite. The only way to be
free from gravitation is infinite distance from mass, until someone
actually invents the famous gravitational shield :-) I hope it comes in
Neville Michie wrote:
> Look up Lagrangian points on Wikipedia.
> There are points of zero gravitational force, about our planet. What
> is more, these points are stationary with respect to Earth, so
> Doppler effects would be zero.
> As the distance from Sun to Earth to Moon varies through the year it
> follows that the distance from Earth of these points must vary on a
> small scale.
> These points are good for satelites as the orbit never decays.
> cheers, Neville Michie
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