On Apr 25, 6:12*am, (G=EMC^2 Glazier) wrote:
What if we could revamp all there is in the universe? lets face it we
have known for decades that there is more to the universe than what
meets the eye. If we could convert the dark energy into pure matter it
would comprise 65% of more mass of the universe,and we also have to add
in dark matter that makes up 30% * *My point of this What if post is we
just see a few percent for the bit of matter we can out there This to me
is very profound. it is so very sad. * I fear we might not be able to
detect EM energies beyond 17 billion light years,and our universe could
be so much further out than that.and its accelerating expansion might
have reached c or better * Trebert

Detecting EM energies beyond 17 billion light years is at best a
technological distraction from the local demise of our solar system,
which at any time could be put at risk from whatever should merge with
our sun, to that of the what-if the fast evolving Sirius ABC should
merge and go supernova on us.

What I'm saying is that we don't have to look very far in order to get
a real observationology eye full of cosmic what-ifs, especially if
you'd care to entertain the notions of our somewhat recently acquiring
Selene as our moon, and appreciating the relatively newish planetology
of Venus.

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.

~ Brad Guth Brad_Guth Brad.Guth BradGuth BG / “Guth Usenet”