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    Space Shades: Humanity's Last Hope | Answers With Joe

    Joe Scott

    1 HN recommender · recommended in 3 months, 2020–2023

    YouTube

    28:46 · 1.1M views · Aug 3, 2020

    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.

    Earth, Energy & EnvironmentClimate policy, solutions & debateSpace exploration & spaceflight
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    3 comments from Hacker News

    1. @laweijfmvoDec 2023· in “Scientists want to put a 'sunshade' in orbit to fight climate change”

      Since the article doesn't talk about the fun details: this video , talks about how big it would need to be, among other things.

      RecommendsView on HN
    2. @flukusJan 2021· in “Earth is losing ice faster today than in the mid-1990s, study suggests”

      Here's a video of someone going through the maths and their various assumptions: this 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.

      CitesView on HN
    3. @pasSep 2020· in “Mars Problems vs. Venus Problems”

      Solar shades the expensive way (as in right now, launch from Earth): this video After kickstarting a Lunar economy so you can manufacture and launch them well outside Earth's gravity well: [LINK]

      CitesView on HN