serious Q how hard could it really be to put a swarm of solar reflectors (or better yet, photovoltaic cells) at the earth-sun L1 lagrange point? i understand that it would be a major engineering feat, but it just doesn't seem like it'd be prohibitively difficult ir expensive
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Replying to @realjdburn
sunshade? maybe with a really thin reflector, mylar or gold, electrostatically deployed?
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Replying to @realjdburn
i also want to do an unfolding/deployable fusion reactor i found this paper. they’re pretty optimistic about launch costs, and they need to use radiation pressure for station keeping, and it still comes to trillions. i think cloud seeding in the upper atmosphere is much cheaper
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Replying to @DanielleFong
hmm i wonder how hard it would be to keep a dust cloud more or less intact at L1 i haven't done a deep dive, but what little I've read abt cloud seeding gives me pause
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Replying to @realjdburn
my idea is to use like nano dusted seasalt, which is how the marine layer forms off sf for example, get it into the upper atmosphere wherever the relative humidity is 70% or greater. if / when it comes down it's just a tiny amount of salt,
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Replying to @DanielleFong
no real risk of salting the earth to a significant degree?
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don’t think so
it’s a tiny amount of minerals compared with what’s in eg groundwater
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