Re: USA urges scientists to block out sun

"simple_language@xxxxxxxxx" <simple_language@xxxxxxxxx> wrote in message
news:1170036047.250084.235440@xxxxxxxxxxxxxxxxxxxxxxxxxxxx

All the sudden this nifty Usenet topic is going into the nearest
infomercial space-toilet, and sinking fast.

"USA urges scientists to block out sun" (as though some how we're smart
enough to accomplish such without getting ourselves into more trouble
than it's worth)

http://groups.google.com/group/sci.space.policy/browse_frm/thread/7d2296fc879dbfee/930cc79604c90eee?lnk=st&q=brad+guth&rnum=4&hl=en#930cc79604c90eee
"Ian Stirling" <root@xxxxxxxxxxxxxxxxx> wrote in message
news:45c388d0$0$8719$ed2619ec@xxxxxxxxxxxxxxxxxxxxxxxxxx
You're not looking at millions or billions.
Sedna's orbital speed is somewhere around a kilometer a second.
If the total delta-v needed is 2Km/s, then it needs around 10^25 Ns
of impulse.
Saturn V produces a little under 10^10Ns, or that means 10^15 - or a
quadrillion.
A million billion.

By 2075 is when Sedna should have been moving along much faster, as well
as being a whole lot closer to boot. It seems that all we've got to do
is sort of keep that ball rolling in our direction, and then try harder
to figure out how the hell we're ever going to park that arriving orb in
our L1 pocket, without causing more collateral damage than it's worth.

Because of the applied energy, we'll most likely need to incorporate the
all-knowing wizardly expertise of our nuclear/U235 rocket-***-master
William Mook, and/or perhaps accomplish something He3/fusion in order to
make a massive steam rocket thruster that's supplied the necessary mass
for thermal conversion into superheated steam by all of that red ice.

How about some honest feedback as to the notions of litho-diverting that
icy sucker, via massive impactors that are already available as
NSOs(Near Sedna Objects), much like whatever NEOs or Sirius Oort cloud
items that got our moon into orbiting Earth?
-

Sliding the 1600~1800 km Sedna in the back door, of essentially parking
that icy redish orb into Earth's L1 (along with some interactive station
keeping) that's moving along at roughly 29 km/s, is at best going to be
a damn neat trick, not to mention having first accomplished one heck of
a delta-V improvement from its current km/s status.

According to the preliminary orbital physics of Ian Stirling, if
doubling its velocity from 1.04 km/s to that of 2 km/s demands a delta-v
worth 1e25 Ns, whereas obtaining 29 km/s is then imposing 29e25 Ns (or
is it the square of 29 = 841?), as clearly representing what a truly
horrific effort it's going to take, along with having to resolve any
number of other pesky complications that could easily develop along the
way (such as running itself into Earth or even smacking our moon could
lead to some rather unfortunate consequences for life as we know it).

However, Sedna may not be quite as large nor thereby as massive as we'd
thought (possibly less than 1500 km), and by the year 2075 it's going to
be moving at a much greater velocity before turning the corner and
heading itself back out into the Kuiper belt. Diverting Sedna into
taking advantage of the gravity pull of Jupiter and of whatever else can
be accommodated, should greatly help to deliver the vast majority of the
required delta-v for getting parked at Earth's L1.

Of course, whatever's the best analogy that works on behalf of
relocating Sedna is tens of folds if not a thousand fold better off for
the extremely local task of merely pushing our horrific mascon/moon away
from us, from having otherwise been simply cruising too close for
comfort and thereby mascon/tidal causing GW that's nasty inside and out
to mother Earth, whereas instead becoming safely relocated to Earth's L1
seems perfectly doable. After all, our moon is already going along for
the ride at nearly 30 km/s, and best of all, there'd still be a moon
that's orbiting Earth, which by rights could still accommodate the one
and only LSE-CM/ISS as owned and operated by China, along with its nifty
tether dipole element reaching its termination pod or platform of all
those 100 GW laser cannons to within 4r of Earth, and most likely having
lots of POOFs along the tether way (what could possibly go wrong?)

Too bad we, meaning our warm and fuzzy NASA and of all the supposed
subcontractors and/at higher institutions of learning, as such we don't
seem to own a suitable supercomputer, along with a fully interactive 3D
physics simulator of dealing with such complex orbital mechanics.
Perhaps Russia, China or even India has one, and as such we could beg
for their services.
-
Brad Guth


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