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Nao
@nao.ac.jp
·
Yesterday
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生まれたての惑星たちはふわふわ―4つの若い惑星の質量を正確に決定―
アストロバイオロジーセンターなどの国際研究チームは、若い恒星を公転する4つの惑星の質量を正確に決定しました。これらの惑星は地球の5~10倍の半径を持つにもかかわらず、質量は地球の5~15倍程度しかなく、非常に低密度であることが判明。これは、生まれたての惑星が膨張した大気を持つという理論的予測を初めて観測的に裏付けるものです。
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