Feb 19, 2007
Chaotic Callisto
Another of Jupiter's
moons provides evidence for planetary electric discharge
events.
Just as the
Cassini mission's images and data analysis provided
substantial evidence for the electric universe hypothesis,
Galileo performed the same service in the exploration of
Jupiter. Launched October 18, 1989,
Galileo had been delayed for several years while NASA
underwent a top to bottom housecleaning following the
Challenger space shuttle explosion. On September 21,
2003, the spacecraft was deliberately sent into the cloud
tops of Jupiter, where it is was incinerated. Because of the
discovery on Europa of a
possible water ocean underneath the ice, NASA did not
want Galileo to randomly rove around the system and possibly
collide with Europa after its fuel supply was exhausted. In
order to protect the Europan ecology, NASA decided to
destroy it.
The four
Galilean moons - the ones originally discovered by the
famed Italian astronomer - are the largest and have been
imaged more often by more instruments than any others. As a
member of the Jovian system,
Callisto appears to bear the marks of many
huge electrical jolts. Of course, the incredible
number of craters on this moon could be considered
anomalous and their shape and arrangement seem to support
that idea, but there are many other qualities of this beaten
body that are difficult to explain.
The
gigantic ring of ridges that dominates the trailing
hemisphere of
Callisto marks out a circle some 1056 kilometers in
diameter. Known as the
Asgard Multi-Ring Structure, it consists of concentric
rings that outline a bright central feature. A large, domed
crater named
Doh in the center of the bright plain is unusual.Rather than having a depression in the center of the
crater, 50 kilometer-wide Doh contains a
huge mound-shape, cut through with deep channels. More
then anything else, this feature is reminiscent of the large
fulgamites, similar to Olympus Mons, that have been
discussed in past
Thunderbolts Picture of the Day articles.
The
Valhalla Basin is another point to consider in the
electric theory of Callisto's topography, as well as the
enormous crater in the southern hemisphere. At 200
kilometers in diameter, its rays extend outward hundreds of
kilometers across the surface very much like the lunar
crater,
Tycho. As has been noted several times in
past Pictures of the Day, the morphology of such rays
can be traced to electrical effects.
There is another
crater that should also be listed in this compilation of
anomalies on
Callisto, and that is
Har. The Har crater is a 50-kilometer-wide double ring
with another 20-kilometer-wide crater centered on its rim.
This formation has been
tentatively identified with others as the scar of an
electric arc discharge because it has a central mound with
parallel striations running through it beyond the far rim.
The multiple smaller craters are often tear-drop shaped and
occur in
long chains, another characteristic of cathode
discharges to an oppositely charged surface.
Callisto's
surface is more
knobby than the other moons in the solar system. There
are areas of hundreds of square kilometers exhibiting few
craters but vast fields of rounded spires sticking out of
the surface. In other areas, the
spires are tilted and angular, as if they are the tops
of material that has been fused into the faceted shapes.
Such formations can be found in some areas of the
African desert, as well as on Mars. If similar
structures are found on dry and frozen planets with
virtually no atmosphere, but also on our habitable planet,
where water and oxygen are plentiful, what creates these
features in such dissimilar environments? The answer seems
to be electric discharge.
By Stephen Smith
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