From:    Chris Nedin
Sep-09-93 11:52PM
Velikovsky - right theory, wrong planets??

Organization: Geology & Geophysics, Adelaide University
From: cnedin@geology.adelaide.edu.au (Chris Nedin)
Message-ID: 
Followup-To: talk.origins
Newsgroups: talk.origins

I found this in one of the latest aquisitions to the library here:

Zharkov, V.N. (1993) The Role of Jupiter in the Formation of Planets. in
Evolution of the Earth and Planets. Geophysical Monograph 74, IUGG Volume
14: p 7-?

Abstract
Five-layer models of Jupiter and Saturn and three-layer models of Uranus
and Neptune are considered here, and are shown not to support Mizuno's
hypothesis that the embryos of the planets on which the accretion of gas
takes place are approximately equal in mass, being 10-15 Mo, where Mo =
mass of the Earth. planetesimals expelled from Jupiter's zone after it's
formation exerted a significant effect on the formation of the planetary
system. It is generally accepted at present that these planitesimals almost
completely destroyed the feeding zone in the asteroid belt and reduced the
amount of matter taking part in the formation of Mars by a factor of 20.
The model for the accumulation of terrestrial planets from two chemically
very different components, A and B, is also connected with the influence of
Jupiter.

It is suggested that the accumulation time of Mars depends on the presence
of proto-Jupiter, and is limited by the time scale for the growth of
Jupiter. This limit has been roughly estimated to be approx. 1.7 x 10^7
years, which is approximately the time spent by the sun in the T Tauri
stage.

A new scheme for the formation of Saturn, Uranus and Neptune is proposed.
After completion of the formation of Jupiter over a period of  approx.
(1-2) x 10^7 years, the planet ejects a massive embryo with a mass of
approx. 5 Mo into the Saturn feeding zone. This nucleus initiates the
formation of Saturn. After the formation of Jupiter and Saturn, massive
embryos are ejected into the Uranus and Neptune feeding zones and lead to
the formation of Uranua and Neptune over cosmogonically [? - me] realistic
time intervals.

So, there you have it!

It's been a funny old week somehow. < sits back, ponders, looks out of
window, past bars, over moat, through electrified fence, between patrolling
guard dogs to . . .shrubbery. Of coarse, it's the first week of SPRING!!
Should have known, pheromones in the air and NFL American Football back on
the tv (go you Oilers! Moooooooon, Moooooooon).

Chris

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