"Brad Guth" wrote in message
news:09119ca4fc63a755ff19e35ab5699889.49644@mygate .mailgate.org
First of all, Earth w/o moon would still be humanly livable, although
soon enough becoming an icy cold sucker. However, Earth w/o
magnetosphere will soon become a larger version of Mars, and thus not so
surface livable.
An ongoing question is: What can we best afford to move into Earth's L1
that'll give us the most interactive control of shade, and still provide
us with multiple other nifty considerations that are much better off
than we currently have to work with?
The previous pun of a notion that's on behalf of relocating Sedna to
Earth's L1 might eventually become one of our best solutions for
accomplishing a solar shade that's a little big but otherwise just about
the right size of solar shade. However, as for my going along with John
Schilling, I'd have to agree that a relocation of Sedna to Earth's L1 is
a stretch, not to mention a serious long term alternative that sucks at
being at least a good century at best away from benefiting our GW
situation, that's only going to get worse per year after year no matters
what. Or, don't you folks fully appreciate where the vast majority of
our ice age thawing and ongoing GW energy is actually coming from?
Did by chance any of you folks even once bother to ask our resident
lord/wizard William Mook, as to exactly how much tonnage of U238/U235
we're talking about, as per relocating our very own moon, to Earth's L1?
Or, what if instead of wasting a perfectly good 2000 kg cache of U238
that we're likely going to need for WW-III, we simply utilized Sedna's
arriving worth of KE, as for having a direct impact at just the right
timing and angle?
Say if Sedna's icy mass of 5e21 kg were orchestrated on behalf of
arriving at the final moon impact velocity of 2 km/s = 1e28 x eff joules
Even if that were at 10% KE impact efficiency, that's offering 1e27
joules, although a rear-ender/(sucker punch) at 1 km/sec would become a
much softer 2.5e26 joules, that by rights should still accomplish a
little something impressive.
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Alternative if not a whole lot better local Plan-B: Relocate our moon
Relocating lunar mass via L2 deployed tether, far out past the moon's L2
point of no return. Say going way out there for using this 2X L2, and
say we/robotics somehow manage to place 1e9 tonnes out there on the
tippy end of that nifty 2X L2 tethered distance away from the moon's CG,
a placement distance of roughly 129,400 km for starters seems perfectly
doable.
How much applied exit or delta-v force is that going to provide?
Here's the best preliminary math that seems about right.
2X moon L2 = 129,400 km
129,400 / 384,400 = .33663
Orbital velocity: 1.33663 x 1.023 km/s = 1.367 km/s
2X L2 orbital Earth velocity = 1.367 km/s (in relation to Earth)
2X L2 orbital moon velocity = 344.421 m/s (in relation to the moon)
Centripetal/Centrifugal force: Fc=MV2/r
http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html#cf
If we're given the 2X L2 orbital mass of 1e12 kg (including whatever's
tether)
Moon's 2X L2: Fc=MV2/r = 9.167374e8 N = 93,481 tonnes
Earth/moon 2X L2: Fc=MV2/r = 3.637e9 N = 370,871 tonnes
That's a combined total of 464,353 tonnes of centrifugal applied force
that's worthy of accomplishing something, especially when applied over
the time span of perhaps a few years, of which I don't believe it'll
actually take all that long, or even nearly the 1e12 kg placement of
mass at the moon's 2X L2.
Roughly/swag speaking; using this moon L2 package of 1e12 kg in
tethered mass acting as a physical tug upon getting that nasty moon
further away from Earth, how long will it take for that task of getting
rid of our moon (relocated to Earth L1 that is)?
Seems having our moon relocated to Earth's L1 is actually a
multi-tasking win-win for accomplishing all sorts of future science and
space exploration, and otherwise of direct benefit to our environment,
and of most everything else I can think of seems better off. As for the
naysay or whatever negatives, at least thus far I have a list of zilch
to offer because, it even benefits my LSE-CM/ISS that can still deploy
its tether dipole element to within 4r of Earth, and there's lots more
to consider if you still have that yaysay open mindset to work with.
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Brad Guth
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