ナショナルジオグラフィックのインスタグラム(natgeo) - 10月8日 04時00分

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The mixture of gasses measured in exoplanet K2-18 b suggests it may have a global ocean beneath a hydrogen-rich atmosphere—and astronomers even spotted a tantalizing, though unconfirmed, sign of life. #WorldSpaceWeek

Illustration by NASA, CSA, ESA, J. Olmsted (STScI), Science: N. Madhusudhan (Cambridge University)

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