[geocentrism] Re: solar eclipse shadow diagram on BA
- From: Mike <mboyd@xxxxxxxxxxxx>
- To: geocentrism@xxxxxxxxxxxxx
- Date: Thu, 14 Oct 2004 13:05:31 +0100
A knocked up a very crude diagram a few months ago.
http://www.doc.ic.ac.uk/~mboyd/eclipse.gif
While it is not at all to scale it clearly shows the umbra moving across
the entire surface of the earth while the moon only travels 27 degrees
about it's orbit.
27 degress is way too high, in reality it's about 2 degrees. The moon
in my diagram is too close to the earth. You should be able to see that
if we move the moon twice as far away and scale the moon up so the sun
and moon both have the same apparent diameter from earth (which
observationally they do) then the radius and circumference of the moon's
orbit will be twice as large but the distance the moon travels during
the eclipse doesn't change much (and is acutally slightly less).
From this I hope it is obvious that the angular velocity of the moon is
irrelevant to the speed of the eclipse and that it depends on the actual
(or tangential) velocity of the moon as it sweeps across the "light
tube" between the sun and earth.
Regards,
Mike.
Gary L. Shelton wrote:
> Okay, that didn't work. I'll send it directly to Dr. Jones.
>
> Gary
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