qed100@hotmail.com (Mark Martin) wrote in message news:<7d087978.0402051031.1aa2297b@posting.google.com>...
> double-a@hush.com (Double-A) wrote in message news:<79094630.0402050043.67e95e0e@posting.google.com>...
>  
> > The Sun even currently shoots solar fares high above its surface. 
> > Some of the particles from them even reach the Earth.  I believe
> > sunspots are involved in this.
> > 
> > When the Sun was spinning much faster, larger volumes of ejecta may
> > have been expelled, some of which might have cooled into asteroids. 
> > While it is true that there initial orbits would have terminated back
> > in the Sun, if many were being ejected during a time of intense
> > sunspot activity, they might have interacted gravitationally with each
> > other so that while some still fell back, others were modified in
> > there orbits and stayed in orbit.  Eventually they have collided with
> > each other to form larger more planetary like bodies.
> > 
> > It's possible.
> 
>    No it's not. Not the way that you describe it. If all solar ejecta
> is on free-fall ballistic trajectories which return to the Sun, then
> no matter how the bits & pieces interact, the average trajectory will
> always return to the Sun. It's dynamically impossible for freely
> falling ejecta to "somehow" find itself in a stable orbit which
> bypasses the Sun. It takes some sort of further interaction to do
> that.
> 
>    Suppose that a planet is spewed from the Sun. Once it's on its own,
> that planet needs "assistance" to change its path from a Sun-returning
> to Sun-bypassing. The planet needs to spit out some ejecta of its own,
> or it needs to collide with another non-Sun-returning body in such a
> way as the ejectile-planet's momentum is changed just so.
> 
>    But if the ejectile planets issue their own sub-ejecta, then what's
> the likelyhood that they *just happen* to all tend to impart their
> delta-V at exactly the time place to put each of them into near
> circular orbits? Hmm? And if they all entered their present orbits by
> interacting with 3rd bodies, then [1]- what's the likelyhood that
> those interactions tended to impart delta-V's which place the ejectile
> planets on near circular orbits? [2]- If 3rd party non-Sun-returning
> objects are the key, then where'd they all come from to begin with? It
> then becomes necessary to propose a planet forming process which is
> independent of Solar ejecta, and this is the sort of model which is
> already avalailable.
> 
>    Now of course, one might say that this still doesn't preclude Solar
> ejecta as the source of at least -some- of the planetary objects. But
> then it's necessary to  point out that, even though the Sun blasts
> huge tonnages of mass into space, that mass is still so rarified as to
> constitute a cleaner vacuum than is attainable in the laboratory.
> 
> -Mark Martin


Bravo, Mark! Very well described! Add to this one more nuance. To
consist of more or less heavy material - silicon, iron - these
ejections have to be produced from internal regions of Sun, where the
pressure is much higher than in atmosphere. Therefore, abrupt
extension will provide dissipation, not coagulation of substance.
Indeed, such process is able to produce some small bodies and dust,
maybe even asteroids. But we hardly can suppose such way for serious
bodies, even like Mercury.

Regards,

Sergey