42年間の暗闇：天王星の恐怖 [動画]
天王星は太陽系で最も奇妙で過酷な環境を持つ惑星の一つ。約42年もの間、太陽光が当たらない極夜が続き、極端な温度変化や独特の磁場、異常な自転軸の傾きなど、想像を絶する過酷な世界の実態を解説する動画。
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