Subject: Re: [LPNY DISCUSS] Re: Tides
Date: Wed, 24 Sep 2003 09:11:04 -0400
To:        <lpny_discuss@yahoogroups.com>
From:     Bob Armstrong <bob@cosy.com>

 Don ,
 
 It's just a teeter-totter ( aka lever ) with the weight on
 on side 330k times heavier than the other . so the Center
 of Gravity is 1 % 330000 of the way from the center of
 the heavy side . 

 ( my error was that I divided by solar diameter I found
  rather than dividing it by 2 to get the radius .
  The center of motion is about .000647 of the distance
  from the center to the surface . )

On Tue, 23 Sep 2003 23:04:20 -0400, Don Silberger wrote:
>=A0=A0I didn't check your computations, Bob. =A0I'm not even sure you=
 used
>=A0the formula I'd reccmmend, which is:
>=A0=A0=A0dM =3D Dm =A0whence =A0d =3D Dm/M, =A0where
>=A0=A0=A0d =A0denotes the distance from the sun's center to the pivot=
 point
>=A0=A0=A0D =A0denotes the distance from the earth's center to the pivot=
 point
>=A0=A0=A0M =A0denotes the sun's mass
>=A0=A0=A0m =A0denotes the earth's mass
>=A0and the ``pivot point" is the spot that does not wobble as it=
 is watched
>=A0from Alpha Centauri or some star system that far away but at=
 right
>=A0angles to the earth's ecliptic.
>=A0=A0All of this of course ignored the gravitational influences of=
 any other
>=A0bodies besides the earth and the sun.
>=A0=A0Now you do the arithmetic carefully, and report it to us. =A0I=
 won't
>=A0check your arithmetic.
>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0-- Donald
>
>=A0At 10:18 PM 9/23/03 -0400, you wrote:
>=A0>
>=A0>Oops , can anybody spot the error in my last post below ?
>=A0>
>=A0>On Tue, 23 Sep 2003 20:23:00 -0400, Bob Armstrong wrote:
>=A0>>=A0On Tue, 23 Sep 2003 18:30:47 -0400, Don Silberger wrote:
>=A0>>=A0>=A0Actually, guys, the sun DOES revolve around the earth.=
 =A0Both the
>=A0>>=A0>=A0earth and the sun revolve around their common center of=
 mass.
>=A0>>=A0>=A0I've not calculated where that might be situated, but my=
 gestimate
>=A0>>=A0>=A0is that it will be somewhere inside the sun's ``surface",=
 but nearer
>=A0>>=A0>=A0to that surface than it is to the center of the sun. =A0 =A0=
 =A0-- Donald
>=A0>>
>=A0>>=A0From
>=A0>>=A0http://www.windows.ucar.edu/tour/link=3D/our_solar_system/refe=
rence_data.html
>=A0>>
>=A0>>=A0the solar mass is 330,000 times that of the earth and they=
 are
>=A0>>=A0149.6 KM apart ( I assume that is center to center . )
>=A0>>
>=A0>>=A0So , the center of gravity is
>=A0>>=A0146.6E6 % 330000 />/ 453.33 =A0/ KM from the center of the=
 sun
>=A0>>=A0which is 1.4 million KM in diameter .
>=A0>>
>=A0>>=A0So the center of rotation is of the earth and sun is
>=A0>>=A0only 0.0003238 of the way from the center to the surface .
>=A0>
>=A0>--
>=A0>=A0Bob Armstrong -- http://CoSy.com -- 212-285-1864
>=A0>Return our Right to Relax :
>=A0>=A0http://ny.lp.org/cgi-bin/petition.cgi?Against_the_Smoking_Ban=


--=A0
=A0Bob Armstrong -- http://CoSy.com -- 212-285-1864
Return our Right to Relax :
=A0http://ny.lp.org/cgi-bin/petition.cgi?Against_the_Smoking_Ban
Liberty : http://CoSy.com/Liberty.htm
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A02003/09/24 9:01:11 AM