Re: Sol-like system discovered...SETI new directions?

From: ABlainey@aol.com
Date: Sat Jul 12 2003 - 18:43:22 MDT

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    In a message dated 12/07/2003 11:12:16 GMT Daylight Time, asa@nada.kth.se
    writes:

    > For a static field in such a "slow gravity" universe nothing would
    > change. But imagine sending out Voyager towards Jupiter. At first it
    > experiences the weak tug towards the place where Jupiter was a long time
    > ago, and is accelerated that way. As it approaches the region where
    > Jupiter is, the acceleration will change direction and move towards the
    > current position, and as Voyager continues beyond it will shift back
    > towards an old position

    This warranted a seperate response.

    This is the experiment that should be performed in order to determine the
    propogation speed of gravity.

    If a craft was fitted with a telescope and crosshairs. The crosshair being
    centered on Jupiter and therfor on the centre of the light being
    emited/reflected from jupiter.
    Also onboard is a sensative gravity detector. Basically a weighing scale or
    suchlike, that is calibrated exactly perpendicular to the telescope. Therfor
    lining up with the crosshairs.
    This measuring device mounted in a Gyroscope/Gimbal so that it can find the
    centre of gravitational pull be means of gyroscope precession when the force is
    felt.

    When we approarch Jupiter at an angle close to 90 degrees from its orbital
    path in the same plane. So that from our point of view, Jupiter is traveling
    from left to right.
    We can see whether the center of gravity lines up with the centre of light
    emmision.
    If it does, then the speed of gravity propogation is equal to the speed of
    light or near as damit.
    If however there is deviation between the two centers then we can see the
    speed difference. If Gravitational center is ahead of the light center then
    Gravity does propogate faster than light and conversly if the gravitational center
    is behind. Then it propogates slower.
    We know all the figures for distance, SOL, craft speed etc. So from these we
    can determine exactly what the propogational speed is.

    What do you think? Better than trying to measure bent radio waves?

    Alex



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