Space Shades: Humanity's Last Hope | Answers With Joe
Joe Scott1 HN recommenders · 2020–2023
1.1M views · explainer · dated · Uploaded 2020-08-03
Joe Scott takes a serious look at space sunshades as a climate fix, asking how big they would need to be, what they would cost and whether they would work. He draws on Roger Angel's paper and launch options.
Linked as a worked look at the maths and assumptions of orbital sunshades, which concludes they are impractical.
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Solar shades the expensive way (as in right now, launch from Earth): [VIDEO] After kickstarting a Lunar economy so you can manufacture and launch them well outside Earth's gravity well: [LINK]
Here's a video of someone going through the maths and their various assumptions: [VIDEO] TLDR: It's preposterous in just about every way, from the number of shades needed to the costs to the number of launches required.
Since the article doesn't talk about the fun details: [VIDEO] , talks about how big it would need to be, among other things.