太陽系の果てに潜む「第2の太陽」の正体 第9惑星は間違い？科学界を揺るがす「暗黒星」説
Synopsis
冥王星の遥か彼方、太陽系の最果てには、私たちがまだ知らない「巨大な影」が潜んでいるかもしれません。長年議論されてきた ...
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