Show HN: Concordia, a 21 km rotating space city you can walk in the browser

2026-10-30来源 Hacker News ShowEnglish

原文:https://www.a8q9.cn/en/article/show-hn-concordia-a-21-km-rotating-space-city-you-can-walk-in-the-browser-daf6ae.html

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