Addressing the formation of the solar system

On Apr 6, 10:20*pm, BURT wrote:
How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:
The collapse time scale for an idealized giant molecular cloud is
about a million years. Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. For galactic disks, formation time scales
are a few hundred million years. No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

~ BG

On Apr 25, 6:59*am, BradGuth wrote:
On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:

The collapse time scale for an idealized giant molecular cloud is
about a million years. *Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. *For galactic disks, formation time scales
are a few hundred million years. *No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

*~ BG

When the truly massive Sirius B went into its relatively fast stellar
evolution process of becoming a red giant, and then suddenly shrinking
down to a small white dwarf of 1/6th to perhaps as little as 1/8th of
it's original mass, subsequently having lost its tidal radius grip
upon whatever planets and their moons which coexisted for some odd 250
millions of years, is perhaps why our solar system seems to have
acquired a few items.

Sirius A hasn't exactly been all that passive either, as perhaps
originally worth 3+ solar masses, and there's still no telling as to
whatever Sirius C used to represent.
~ BG

On Apr 25, 9:51*am, BradGuth wrote:
On Apr 25, 6:59*am, BradGuth wrote:





On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:

The collapse time scale for an idealized giant molecular cloud is
about a million years. *Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. *For galactic disks, formation time scales
are a few hundred million years. *No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

*~ BG

When the truly massive Sirius B went into its relatively fast stellar
evolution process of becoming a red giant, and then suddenly shrinking
down to a small white dwarf of 1/6th to perhaps as little as 1/8th of
it's original mass, subsequently having lost its tidal radius grip
upon whatever planets and their moons which coexisted for some odd 250
millions of years, is perhaps why our solar system seems to have
acquired a few items.

Sirius A hasn't exactly been all that passive either, as perhaps
originally worth 3+ solar masses, and there's still no telling as to
whatever Sirius C used to represent.
*~ BG- Hide quoted text -

- Show quoted text -

I still think that understanding solar system formaion would be an
incredible leap. If you pick quadrillions of objects comming together
how can we fathom it?

On Apr 25, 2:25*pm, BURT wrote:
On Apr 25, 9:51*am, BradGuth wrote:



On Apr 25, 6:59*am, BradGuth wrote:

On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:

The collapse time scale for an idealized giant molecular cloud is
about a million years. *Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence..

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. *For galactic disks, formation time scales
are a few hundred million years. *No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

*~ BG

When the truly massive Sirius B went into its relatively fast stellar
evolution process of becoming a red giant, and then suddenly shrinking
down to a small white dwarf of 1/6th to perhaps as little as 1/8th of
it's original mass, subsequently having lost its tidal radius grip
upon whatever planets and their moons which coexisted for some odd 250
millions of years, is perhaps why our solar system seems to have
acquired a few items.

Sirius A hasn't exactly been all that passive either, as perhaps
originally worth 3+ solar masses, and there's still no telling as to
whatever Sirius C used to represent.
*~ BG- Hide quoted text -

- Show quoted text -

I still think that understanding solar system formaion would be an
incredible leap. If you pick quadrillions of objects comming together
how can we fathom it?

I totally agree, as our spendy public owned supercomputers should have
more than done the trick, delivering fully 3D interactive
simulations. Perhaps Steve Willner and a few others of his
knowledgeable kind can help us out.

~ BG

On Apr 25, 1:41*pm, BradGuth wrote:
On Apr 25, 2:25*pm, BURT wrote:





On Apr 25, 9:51*am, BradGuth wrote:

On Apr 25, 6:59*am, BradGuth wrote:

On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:

The collapse time scale for an idealized giant molecular cloud is
about a million years. *Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. *For galactic disks, formation time scales
are a few hundred million years. *No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

*~ BG

When the truly massive Sirius B went into its relatively fast stellar
evolution process of becoming a red giant, and then suddenly shrinking
down to a small white dwarf of 1/6th to perhaps as little as 1/8th of
it's original mass, subsequently having lost its tidal radius grip
upon whatever planets and their moons which coexisted for some odd 250
millions of years, is perhaps why our solar system seems to have
acquired a few items.

Sirius A hasn't exactly been all that passive either, as perhaps
originally worth 3+ solar masses, and there's still no telling as to
whatever Sirius C used to represent.
*~ BG- Hide quoted text -

- Show quoted text -

I still think that understanding solar system formaion would be an
incredible leap. If you pick quadrillions of objects comming together
how can we fathom it?

I totally agree, as our spendy public owned supercomputers should have
more than done the trick, delivering fully 3D interactive
simulations. *Perhaps Steve Willner and a few others of his
knowledgeable kind can help us out.

*~ BG- Hide quoted text -

- Show quoted text -

We deal with two body system but what about 200 trillion bodies?

Mitch Raemsch

Painius wrote:
"Mark Earnest" wrote in message
netamerica...
"Mike Dworetsky" wrote in message
...
"Mark Earnest" wrote in message
...
"Martin Brown" wrote in message
...
Mark Earnest wrote:
"BURT" wrote in message
...
How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch
Gas does not come together.
It dissipates.
There is no way the solar system could have formed,
except by supernatural accomplishment.
Gravity and conservation of angular momentum seem to work pretty well.

http://astronomyonline.org/SolarSyst...&SubCate2=SS13

Is a fairly reasonable basic introduction to the topic.

Regards,
Martin Brown
No, YOU tell me how gas anti dissipated into the Solar System.
Don't rely on some cryptic nonsense as some kind of "explanation."
No, you tell me how "Goddidit" is not a cryptic explanation first.
Can't explain it, just as I thought.

Mark, in this day and age, explaining anything by saying
"God did it" is tantamount to giving up trying. Isaac Newton
did that with gravity. Einstein made a better attempt, but
ended up little better than Newton.

Relying upon religion for cosmic answers is the same as
saying "Ignorance is Bliss"! ("T'is Folly to be Wise")

God did not put us here to be his ignorant puppets. Nor did
he install controversial things like fossils to confound us. He
(or She as the case may be) wants us to learn and to grow
as freethinking people with free will. He wants us to search
and to find answers.

You can figuratively throw up you arms in covert misery-
loves-company frustration and preach your heart out. But
you will never convince me that hiding behind a religious
veil is better than *never* surrendering to ignorance!

happy days and...
starry starry nights!

That's a classy and excellent response, yes sir!

Mark Earnest wrote:
Science is the religion, not theism.
In science you have the gods, Newton, Einstein, Hawking...
In science you have the creed: Nothing goes faster than light,
an object in motion stays in motion.
In science you have the pompous highly robed and tassled bishops that decide
if you are a heretic to the scientific faith or not, and if you are,
attempt to throw you out on your can.

I see scientists and pseudo-scientists both attempting to fight
established "scientific dogmas" all the time. If that's a religion,
it's pretty subversive...

Theism is just a mode of operation.
Science is religious fanaticism that cannot even
get us out of Earth orbit 40 years after landing a man on the Moon.

You're so full of ****. Why would you even want to step out from
Eden? How much of this delay is caused by ignorant faith babbling
getting in the way of progress? After all, if some humans survive
Armageddon, something surely is not right by the Scriptures...

On Apr 26, 6:31*pm, BURT wrote:
On Apr 25, 1:41*pm, BradGuth wrote:



On Apr 25, 2:25*pm, BURT wrote:

On Apr 25, 9:51*am, BradGuth wrote:

On Apr 25, 6:59*am, BradGuth wrote:

On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

According to Steve Willner, the nearby stellar creation or
assimilation of something like Sirius ABC transpired fairly quickly,
say within 10 some odd million years if all goes according to plan,
along with most of its protostellar disc remainders having dissipated
within only a few million extra years.

On Apr 24, 1:10 pm, (Steve Willner) wrote:

The collapse time scale for an idealized giant molecular cloud is
about a million years. *Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. *For galactic disks, formation time scales
are a few hundred million years. *No "billions" at all.

This means that a minimum 12,000 solar mass molecular cloud which gave
birth to the original 12+ solar mass of the Sirius star/solar system
took perhaps as little as 15 million years to complete the process, as
of perhaps no greater than 300 MBP.

Meanwhile, our solar system was supposedly fully established and
extremely nearby or even situated within the very same molecular
cloud, and yet somehow managed to avoid any kind of interaction or
benefit from such a nearly cosmic event of collapsing baryons.

Perhaps Steve Willner along with a good computer simulation can
further improve our understanding of this nearby stellar formation
environment of such a horrific molecular cloud, of perhaps at least
12,000 solar masses, that supposedly didn’t affect us.

*~ BG

When the truly massive Sirius B went into its relatively fast stellar
evolution process of becoming a red giant, and then suddenly shrinking
down to a small white dwarf of 1/6th to perhaps as little as 1/8th of
it's original mass, subsequently having lost its tidal radius grip
upon whatever planets and their moons which coexisted for some odd 250
millions of years, is perhaps why our solar system seems to have
acquired a few items.

Sirius A hasn't exactly been all that passive either, as perhaps
originally worth 3+ solar masses, and there's still no telling as to
whatever Sirius C used to represent.
*~ BG- Hide quoted text -

- Show quoted text -

I still think that understanding solar system formaion would be an
incredible leap. If you pick quadrillions of objects comming together
how can we fathom it?

I totally agree, as our spendy public owned supercomputers should have
more than done the trick, delivering fully 3D interactive
simulations. *Perhaps Steve Willner and a few others of his
knowledgeable kind can help us out.

*~ BG- Hide quoted text -

- Show quoted text -

We deal with two body system but what about 200 trillion bodies?

Mitch Raemsch

Now that's a problem that even a super supercomputer like Hal 9100
might not be sufficient.

For most applications of not more than 1000 cubic light years, the
capability of dong complex 3D interactive simulations should have not
been a problem for at least the last decade. Today you'd think we
could safely mange a million cubic light years worth of stellar
motions without blowing a fuse or otherwise melting down our public
funded CPUs.

~ BG
..

On Apr 6, 10:20*pm, BURT wrote:
How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

How about a retrospective look at Sirius B in its red supergiant
phase:

Red giant stars are many, and yet remain a little hard to come by, as
only a few public images of whatever is within 1000 light years seem
to exist that fit within the color saturated eye-candy profiles that
we’ve been taught to accept. However, the visible spectrum is
extremely limited as to what is otherwise technically accessible from
just above and below our genetically limited and thus inferior visual
spectrum. (seems entirely odd that our human evolution was so careless
in having discarded so much visual capability, in that other creatures
seem to have a far wider visual spectrum capability that includes some
UV and IR)

“Red Giant Star Found to Have Massive Tail”
http://www.efluxmedia.com/news_Red_G...l_077 84.html
Mira A of several hundred solar radii (UV colorized as bluish): “A
dying star situated 400 light years away from us exhibits an unusual
and massive tail of heated gas that spreads for more than 13 light
years.”
http://en.wikipedia.org/wiki/Mira
http://www.nasa.gov/mission_pages/galex/20070815/a.html

Sirius B could have been much like an image of Mira A, except a whole
lot larger (1000 solar radii), as viewed in visible and near IR
http://xmm.esac.esa.int/external/xmm...aab_v2_col.pdf

Mira A and lots more composite observationology from FAS
http://www.fas.org/irp/imint/docs/rst/Sect20/A6.html

There are many possibilities, as for how Sirius B used to function as
a truly massive (9 solar mass) star, thereby extremely hot and fast
burning prior to becoming a red supergiant, creating an impressive
planetary nebula phase before ending as the little white dwarf. For
all we know Sirius B was even a variable kind of red giant and then
perhaps a slow nova flashover phase prior to finishing off as the
white dwarf.

These following examples are probably similar or perhaps representing
a slightly smaller version of what the Sirius star/solar system looked
like once Sirius B had started turning itself from an impressive red
supergiant into a white dwarf of perhaps 1/8th its original mass,
taking roughly 64~96,000 years for this explosive mass shedding phase
to happen. A few tens of billions of years later is when such a white
dwarf eventually becomes a black dwarf, kind of black diamond spent
star, in that our universe may or may not be quite old enough to
display such examples.
http://en.wikipedia.org/wiki/Planetary_nebula
http://en.wikipedia.org/wiki/Helix_Nebula
http://en.wikipedia.org/wiki/Cat%27s_Eye_Nebula
http://apod.nasa.gov/apod/ap031207.html
http://www.uv.es/jrtorres/index6.html

Betelgeuse has been a massive red giant at 20+ fold the mass of our
sun, and likely worth nearly 3 fold the mass of the original Sirius B,
and currently expanded to 1000 solar radii, and it'll be truly
impressive nova whenever it transforms into a white dwarf nearly the
size of Jupiter.

The soon to be renewed and improved Hubble should accomplish the
improved spectrum and resolution of most everything, along with other
existing and soon to be deployed telescopes should give us even better
composite examples of what Sirius B used to look like. This may give
some of us a better interpretation as to what transpired right next
door to us, as well as having unavoidably contributed to some of what
our solar system has to offer.

~ BG

On Apr 27, 9:29*am, BradGuth wrote:
On Apr 6, 10:20*pm, BURT wrote:

How do accretion discs form in a flat plane around a star?

How does the gravitational order bring matter together in the solar
plane. How then does this matter proceed to become planets?

There were trillions of lumps of matter. How did they come together
for the order of the solar system we now see?

Nobody can do it. And never will.

Mitch Raemsch

How about a retrospective look at Sirius B in its red supergiant
phase:

Red giant stars are many, and yet remain a little hard to come by, as
only a few public images of whatever is within 1000 light years seem
to exist that fit within the color saturated eye-candy profiles that
we’ve been taught to accept. *However, the visible spectrum is
extremely limited as to what is otherwise technically accessible from
just above and below our genetically limited and thus inferior visual
spectrum. (seems entirely odd that our human evolution was so careless
in having discarded so much visual capability, in that other creatures
seem to have a far wider visual spectrum capability that includes some
UV and IR)

“Red Giant Star Found to Have Massive Tail”
*http://www.efluxmedia.com/news_Red_G...Have_Massive_T....
*Mira A of several hundred solar radii (UV colorized as bluish): “A
dying star situated 400 light years away from us exhibits an unusual
and massive tail of heated gas that spreads for more than 13 light
years.”
*http://en.wikipedia.org/wiki/Mira
*http://www.nasa.gov/mission_pages/galex/20070815/a.html

Sirius B could have been much like an image of Mira A, except a whole
lot larger (1000 solar radii), as viewed in visible and near IR
*http://xmm.esac.esa.int/external/xmm...osium/173770_m....

Mira A and lots more composite observationology from FAS
*http://www.fas.org/irp/imint/docs/rst/Sect20/A6.html

There are many possibilities, as for how Sirius B used to function as
a truly massive (9 solar mass) star, thereby extremely hot and fast
burning prior to becoming a red supergiant, creating an impressive
planetary nebula phase before ending as the little white dwarf. *For
all we know Sirius B was even a variable kind of red giant and then
perhaps a slow nova flashover phase prior to finishing off as the
white dwarf.

These following examples are probably similar or perhaps representing
a slightly smaller version of what the Sirius star/solar system looked
like once Sirius B had started turning itself from an impressive red
supergiant into a white dwarf of perhaps 1/8th its original mass,
taking roughly 64~96,000 years for this explosive mass shedding phase
to happen. *A few tens of billions of years later is when such a white
dwarf eventually becomes a black dwarf, kind of black diamond spent
star, in that our universe may or may not be quite old enough to
display such examples.
*http://en.wikipedia.org/wiki/Planetary_nebula
*http://en.wikipedia.org/wiki/Helix_Nebula
*http://en.wikipedia.org/wiki/Cat%27s_Eye_Nebula
*http://apod.nasa.gov/apod/ap031207.html
*http://www.uv.es/jrtorres/index6.html

Betelgeuse has been a massive red giant at 20+ fold the mass of our
sun, and likely worth nearly 3 fold the mass of the original Sirius B,
and currently expanded to 1000 solar radii, and it'll be truly
impressive nova whenever it transforms into a white dwarf nearly the
size of Jupiter.

The soon to be renewed and improved Hubble should accomplish the
improved spectrum and resolution of most everything, along with other
existing and soon to be deployed telescopes should give us even better
composite examples of what Sirius B used to look like. *This may give
some of us a better interpretation as to what transpired right next
door to us, as well as having unavoidably contributed to some of what
our solar system has to offer.

*~ BG

According to Steve Willner, the nearby stellar creation or cosmic
assimilation process of something like Sirius ABC transpired fairly
quickly, say within 10 some odd million years if all goes according to
plan, along with most of its protostellar disc remainders having
dissipated within only a few million years thereafter, rather than the
billion all-inclusive years that I’d previously thought.

On Apr 24, 1:10 pm, (Steve Willner) wrote:
The collapse time scale for an idealized giant molecular cloud is
about a million years. Real clouds collapse slower than that by
perhaps a factor of 10, probably because of internal gas turbulence.

You can see that the time scale is likely to be much shorter than
"billions of years" by observing that something over 90% of baryons
are incorporated into stars.

Protostellar disks form in a few hundred thousand years and dissipate
in a few million years. For galactic disks, formation time scales
are a few hundred million years. No "billions" at all.

This means that a minimum 12,000 120,000 solar mass molecular cloud
which gave birth to the original 12 solar mass of the Sirius star/
solar system took perhaps as little as 12 million years to complete
that initial process, rapping everything up as of perhaps no greater
than 300 MBP to perhaps as recent as 250 MBP.

Meanwhile, our passive solar system was supposedly fully established
and extremely nearby or even situated within the very same molecular
cloud, and yet somehow (far beyond my comprehension) having managed to
avoid any kind of give or take interactions or indirect trauma or
benefit from such a nearly cosmic event of collapsing baryons that
formed into the originally impressive Sirius star/solar system that’s
still worth nearly 3.5 the mass of our solar system.

Perhaps Steve Willner along with a good public funded supercomputer
simulation can further improve our deductive understanding of this
nearby stellar formation and complex environment of such a nifty
molecular cloud, once again that of perhaps at least 12,000 120,000
solar masses, that supposedly didn’t affect us at its beginning,
throughout its normal stellar evolution, or that of its impressive red
supergiant phase that could easily have been worth 1000 radii, and of
its subsequent recent end of life phase at becoming a compact white
dwarf which thereby lost its tidal radius grip upon whatever planets
and possibly even a third significant main sequence star of 2e30 kg.
Are we lucky, or what!

~ BG