shade the poles to slow or stop global warming with SPS

"Ian Stirling" wrote in message
...
Mike Combs wrote:

What keeps the "other lens behind this" in position? By this point
we're
many thousands of kilometers Earthward of the L-1 point.

I don't really think that's the biggest engineering challenge...
Worst case, rather a lot of rope, total gravitational accelleration
should be quite modest across the structure.

OK, if I get you right we're talking about a very long structure with one
end with a giant lens (or shade) considerably closer to the Earth, but
nonetheless which has its center of gravity at the L-1 point. I'd wondered
about such a possibility, but my mind rebelled at the lengths required. At
the very least, it complicates the design a good deal over simple sunshades
at L-1, but still might wind up being more efficient, I suppose.

Maybe we could use an asteroid as a counterweight to minimize the required
length sunward of L-1.

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Regards,
Mike Combs
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Member of the National Non-sequitur Society. We may not make
much sense, but we do like pizza.