Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 (Tek) 9/28/84 based on 9/17/84; site vice.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!mtuxo!mtunh!mtung!mtunf!ariel!vax135!cornell!uw-beaver!tektronix!tekcrl!vice!keithl
From: keithl@vice.UUCP (Keith Lofstrom)
Newsgroups: net.space
Subject: Re: Antigravity References
Message-ID: <126@vice.UUCP>
Date: Fri, 28-Jun-85 20:01:52 EDT
Article-I.D.: vice.126
Posted: Fri Jun 28 20:01:52 1985
Date-Received: Wed, 3-Jul-85 08:34:43 EDT
References: <2295@mordor.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 31


   
   In article <2295@mordor.UUCP>, jennings@AEROSPACE.ARPA mentions
a gravitational oscillation "with a period of 24 hours, 50 minutes
with a magnitude of 10e-6g".  The author of the paper he cites suggested
a new theory of gravity was needed.

   The period mentioned just happens to be the time the Earth takes
to make one revolution RELATIVE TO THE MOON.  Hmmm...perhaps he made this
"Earth-shaking" discovery in a lab without windows...

   Gravitational fields are inverse square, and gravitational gradients
are equal to the derivative of this field.  This means that the lunar
gravitational effect is a little stronger on the near side of the Earth
than on the far side or at the center.  That's the source of tides.

   Computationally, the size of the effect at the equator is only 1.1e-7g.
This assumes a rigid Earth and no gravitational effects from tidally shifting
oceans and atmosphere, though.  Any astronomers care to pick up the
ball (wait 'til after moonrise; it's easier then :-), and do a better
calculation?

Newtonianly yours;


-- 
Keith Lofstrom
MS 59-316, Tektronix, PO 500, Beaverton OR 97077  (503)-627-4052
uucp:	{ucbvax,decvax,chico,pur-ee,cbosg,ihnss}!tektronix!vice!keithl
CSnet:	keithl@tek
ARPAnet:keithl.tek@rand-relay