太陽光で帆走する宇宙船「LightSail 2」が帆を広げる段階に到達！
2019/07/06 03:20
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![前川喜平氏「へズマ(＝へずまりゅう)。こんなやつ日本にいてほしくない。」 [662593167]](http://matome-ch.com/image/8/8364948.jpg)
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