From: Rasputin Novgorod <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Information on the Danjon Astrolab Date: Tue, 8 Aug 2006 13:49:29 -0700 (PDT) Message-ID: <[EMAIL PROTECTED]>
> > ofcourse they have a different local gravity and the > > gradient of that > > will differ (and hence the angle of the gravity will differ slightly > > from that > > of the normal on the ellipsoid). Ever looked at a gravity map of the > > earth? > > Wait a minute. The center of gravity ~is~ the center of gravity. > You can't have two, or multiple centers. The strength of gravity > varies from place to place, but that doesn't change the direction. > If I'm wrong; please explain... First of all, this ball of iron and siliconoxide that we call home, is far from homogene. This causes local variations in gravity, simply because the local ore may be heavier than the average crust. This does not only cause the gravity to be stronger downwards, but also affect things sideways. As you get closer to such an area your gravity force will point more towards that area rather than towards the gravity center of earth. Thus, the gradient of the gravity force will help to point you off center so to speak. Another fun little gravity play is that ball of stone that made a wonderfull spectacle in the sky this evening, called the moon. It's gravity will also pull things, such as water, and do that sideways too. Did that make sense? Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
