Re: Poor Velekovsky


"jcon" <cirejcon@xxxxxxxxx> wrote in message
news:1124120518.953182.132620@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Al wrote:
> > "jcon" <cirejcon@xxxxxxxxx> wrote in message
> > news:1123940156.097796.76780@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > >
> > > Al wrote:
> > snip
> > In 1950 Velikovsky said that Venus is hot and has a hydrocarbon
atmosphere.
> > This was not in accordance with the establishment paradigm of the time.
>
> It's also dead wrong. He said it would have an atmosphere similar
> to Jupiter. In fact, Venus' atmosphere is 96.5% CO2,
> 3.5% N2, and trace amounts of everything else (note, since you
> seem confused about this, C02 and N2 are NOT hydrocarbons). In
> contrast, the outer gas giants are very similar to each other and
> TOTALLY different from Venus (they are mostly H2 and He, with
> some methane, which IS a hydrocarbon).

What on Venus are you talking about?
What would happen to methane at Venus temperatures?
>


> All his claims rested on the belief that Venus was "belched" out
> by Jupiter, at some time within recorded human history. There
> is NO, NO, NO plausible scenario where this could have occured.
>
Are you using the methane scenario to prove this?

> > The
> > sheer volume of the atmosphere does not bode well for present theories
and
> > its super rotation is more likely due to heat escaping from the
interior.
> ^^^^^^^^^^^^^^
>
> First of all, the day on Venus is longer than the year. Second,
> how can heat escaping from the interior affect the length of
> the day?

The atmospheric super-rotation///////////////////////////////
>
>
> > However I don't expect anyone to deliberately support his (Velikovsky)
> > claims. Or do I?

By BBC News Online Science Editor Dr David Whitehouse

New suggestions that the planets in our Solar System have not always been in
their current orbits have been put forward by two teams of astronomers.

This work, along with recent speculation that Jupiter may have formed much
further from the Sun than its current position, and the discovery of other
planetary systems orbiting other stars, is forcing a reappraisal of our
understanding of how the planets were formed.

Writing in the journal Nature, researchers from Queen's University in
Kingston, Canada, propose that all of the giant planets in our Solar System
formed in a narrow region of the gas and dust cloud that surrounded the
early Sun. They suggest that they ended up in their present orbits as a
result of violent and chaotic scattering.

This would mean that when Jupiter, our Solar System's largest planet,
formed, it triggered the birth of other giant planets nearby. In a way,
Jupiter was the "midwife" of the Solar System.

Rocky cores

The four major planets in our Solar System are classified into two "gas
giants" (Jupiter and Saturn), that have a small rocky core surrounded by a
large hydrogen and helium atmosphere and also two "ice giants" (Uranus and
Neptune), that have icy mantles around their cores and only a thin
atmosphere.



Scientists have always been slightly puzzled by the positions of Uranus and
Neptune because in their present locations it would have taken longer than
the age of the Solar System for them to form.

The scientists from Queen's University suggest that the four giant planets
started out as rocky cores in the Jupiter-Saturn region, and that the cores
of Uranus and Neptune were tossed out by Jupiter's and Saturn's gravity.

In the simulations, the ejected planets went into highly chaotic orbits for
a few hundred thousand years after which they settled down and gradually
migrated to their present, nearly circular orbits.

Stable orbits

Another group of scientists, also writing in Nature, from the University of
Toronto, have simulated how planets such as Jupiter may have formed in the
first place.

They found that gas and dust circling the early Sun that starts to
accumulate to form a proto-Jupiter creates a spiral density pattern in the
surrounding disk material. The proto-planet accretes mass rapidly through
the spiral arms but when the planetary mass reaches four-to-five-times
Jupiter's mass, the disk rapidly fragments into smaller proto-planets.

Over hundreds of thousands, or millions of years the proto-Uranus and
proto-Neptune would be flung outwards by the now smaller proto-Jupiter's
gravity.

Not too long ago, scientists regarded the orbits that the planets circle our
Sun as being the ones they were born in. Now they are realising that this is
not the case. Uranus and Neptune may have migrated outwards and Jupiter may
have come in from the outer cold.

One of the questions scientists would like to answer is whether the Earth
has always been where it is now?

> >Al
> >


.

Relevant Pages

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  • Mars and Venus are surprisingly similar (Forwarded)
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  • Re: Poor Velekovsky
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