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<DIV><FONT size=2 face=Arial>Please remember that I spent six months doing the
math, based on VSOP87 data. Ganymede and Callisto are generally much
farther away from the other and much larger. Yes, the math indicated a
rare (solar) eclipse of one of the smalller ones by Ganymede, but that seemed to
be extremely rare. Io and Europa are often much closer together, and of
roughly the same diameter, so most of the eclipses and occultations that I had
calculated involved them, one way or the other.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I apologize to your group for bringing up an
ancient incident which seems to have distracted from your gravitational
interests. I had only brought it up due to seeing some logical
weaknesses in some arguments you often discuss, and your recent interest in
"one-way speed of light". I merely thought that one or more of you would
find interest in the "geometrcal issue I had dome math on. The VSOP87
terms all exist, so that simple Calculus can determine the location of any major
object in the Solar System, and I happened to have been intrigued at how rarely
the Galilean moons seem to have ever seem in mutual eclipses or
occultations. Ditto, calculatingn the exact distance from such an event to
where a particular city on Earth at any moment is now doable, where 50 years
ago, it was not.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Such mutual eclipses of Io and Europa are not
remotely like the four-hour Lunar eclipses here. As I had mentioned, the
entirety of the episode is rarely even sixteen seconds. An astronomer
observing such an event does not see a "fading" but all the historical records
semm to describe a "blinking out" or similar comment. I thought that "time
accuracy" might be useful for your group now, regarding trying to obtain a
"one-way speed of light". You refer to "almost" disappeared. You
might look into the archives of the historical astronomy records. Even
when an annular eclipse had clearly occurred, the astronomer still referred to
it as "blinking out" as the moon dropped in celestiasl magnitude by a lot (from
Earth). I am not aware of anyone ever mentioning being able to see an
Annularly eclipsed event, they all seem to describe it as "yes" or "no". I
agree that I would love to see a video of an annular mutual eclipse of Io and
Europa.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>In case any of you are interested, also in 1992, I
was fascinated by the rather strong mutual gravitation effects of Io and Europa
when they do a nearby pass in orbit every few hours. I did a lot of math
on that as well, and was amazed that both of those moons distorted in shape by
nearly a mile due to the pass. They each already are severely egg-shaped
due to Jupiter, and the two Vectors of the gravitational forces do terible
things to the structure of both of them. Even now, I have not seen NASA
acknowledge this, and its internal frictional heating effects in both of
them. NASA seems to speculate on why Europa is so "geologically active"
but I did that math (again due to Newton and his Force Vectors, and I was
satisfied about the heat source inside Europa and Io.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Feel free to go back to your initial
interests.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Carl Johnson </FONT></DIV>
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