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Re: astronomical visualization software
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pys-@aol.com
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Oct 15, 2009 20:26 PDT
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Very interesting ... will have to check out the programs. Amazing what can be done nowadays!
-----Original Message-----
From: dharder <dhar-@bnl.gov>
To: tung-@topica.com
Sent: Thu, Oct 15, 2009 9:32 am
Subject: [ Tunguska ] astronomical visualization software
I exercised some of the features of ‘Solar System Live’. Not bad for
ree, yet it seems to lack some functionality which I found useful about
Dance of the Planets’. Dance allows one to pan the field of view and
nlarge. One can also include the orbits of comets, which is useful
hen performing a comprehensive study of Tuguska—one can check out Enke,
hich some have argued was the source of an incoming iceball.
I have also used the near-Earth view to visualize the trajectory of a
hallow angle incoming geometeor, following the path of the conjunction
rc over Yakutia, as Central Siberia rotates into view. Pursuing a
ar-out hunch, I also checked the position of Jupiter’s moons at, and
ours following the time of the Tunguska event, with respect to the
rbital plane and with respect to the conjunction arc—Dance has that
unctionality. I think one can even include the asteroid belt in the
imulations.
Although Dance is an adequate choice for curious astronomers who demand
ccuracy, it does lack something I would really like to have—pattern
ecognition. I would like to be able to log in a particular system
onfiguration, set an alignment ‘window of acceptance’, and have the
oftware run the simulation through time searching for and logging
ecurrences. I cannot do that, and it is frustrating!
I didn’t pay much attention to the position of Uranus or Neptune, i.e.
he outer solar system, because the outer giants were significantly
utside of Jupiter’s orbital plane on 1/7/1908 @ 00:17 UTC—using Solar
ystem Live check their declination. Also check the declination of
ercury and Venus. Note that they were close to Jupiter’s plane. That
s what was of particular interest to me.
The Earth crosses Jupiter’s orbital plane twice a year, on about June 30
nd New Years Eve, so the Earth was close to Jupiter’s orbital plane at
he time of Tunguska—the inner system went into arc-conjuction on a
ovian spiral, with the Earth very close to Jupiter’s orbital plane, and
ith the sun in flare mode. That gravitational/electromagnetic
onfiguration of events is particularly rare!
Faustweb.net is also free solar system simulation software available on
he web. Input into Faust the Tunguska date and time. Faust also shows
he position of the moon in the arc. Technically, you would be correct
f you were to say that new moon came at 16:33 UTC on June 28, however,
aust shows that the moon completes the arc of conjuction near the time
f Tunguska. Faust doesn’t have the time resolution which Dance does,
nd yet the synchronicity of arc conjunction at Tunguska time is
nmistakable!
Expand the field of view in Faust to include Jupiter. Mentally draw a
ovian spiral through the arc conjunction and out to Jupiter. That
ntrigues me from a magnetic standpoint. Yes, expand the field of view
urther to include Uranus and Neptune, and fit a straight line through
ll the bodies. I cannot deny that is also interesting, from a
ravitational/angular momentum standpoint. Certainly solar system
ravitational/angular momentum and electromagnetic goings on are
oupled.
The Earth’s north and south magnetic poles are offset from the spin axis
f the Earth. In other words, the mechanical moment vector and the
agnetic dipole moment vector are not collinear. Geomagnetists will
ell you that the reason for that lies in the fluid dynamics of the
arth’s outer core—at the heart of the geodynamo. It is logical to
magine that the mechanical moment and the dipole moment for the solar
ystem are also not collinear.
Rigorously, the moment of inertia for the solar system would involve an
ntegration of all mass components—the solar structure, the planets, the
steroid belt, the comets, etc.—and of course their distance from the
xis of gyration is important in the computation.
onsidering the mass of the sun with respect to all other mass in the
ystem, the net mechanical moment vector would likely lie within the
onfines of the sun. The dipole moment of our solar system would
nvolve a similar integration of distributed charge and flux components,
nd one might expect the net dipole moment vector to also lie within the
onfines of the sun.
Of the planets, Jupiter will have the largest effect on both vectors,
hich undoubtedly affects the goings on in the heliodynamo, which in
urn will affect the goings on in the geodynamo due to coupling.
upiter’s effect on the heliodynamo is conspicuous in the correlation
etween its orbital period and the periodicity of the sunspot cycle.
My point is, that at the time of Tunguska, there was synchronous
oordination of angular momentum and electromagnetic system components
hich made a discrete adjustment to the geomagnetic field, as if on
chedule!
DAH 10/15/09
Geophysical interpretation of Tunguska: http://www.geocities.com/olkhov/tunguska.htm
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