🚀 go-pugleaf

In article <3ba83adb.6545804@NNTP.ix.netcom.com>,
Professor Vonroach <vonroach@popd.ix.netcom.com> wrote:
>
>Sounds like tedious work. Though it is amazing when you think about it
>that the surface of the Moon accurately reflects the center of gravity
>to within 3 cm. 

The moon is tectonically inactive, and tidally locked.  IOW, you don't
get significant shifting within the moon.

>How can we determine the center of gravity of the
>Earth with that accuracy?

A more significant problem, but not an impossible one.  Further, it is
not necessary for this purpose to determine the absolute position of
the CoG of the Earth, only any change in that position relative to our
measuring spot.

>Guess we'll have to put a station on the
>Moon to bombard a mirror on the surface of the earth, if we can find
>an average place to call the surface of the Earth. Also that damn
>fluid core may shift slightly from time to time. Buzzard's luck,

>I just remembered molecules, atoms, ions, etc. are escaping from the
>surface of atmosphere into space continuously. I wonder if they are
>precisely replaced by the influx from the good old Sun?

As such a loss is evenly distributed throughout the atmostphere, they are
irrelevant.  You're basically just throwing up noise to cast doubt
rather than pointing out any serious difficulties.



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