氣球和箔條再入段受到空氣阻力當然不難分辨，中段大氣層以外怎麽分辨？天文愛好者觀測的是恒星彗星流星和小行星，都在宇宙空間

來源: 天青水藍於 2023-12-31 22:29:28 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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