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How we knew space is a vacuum (2021) (sky-lights.org) 2 points by fanf2 58 days ago | past | 2 comments How We Knew Space Was a Vacuum (2021) (sky-lights.org) 139 points by susam on March 11, 2023 | past | 48 comments How We Knew Space Was a Vacuum (sky-lights.org) 3 points by susam on March 8, 2023 | past

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