惑星組成...核は揮発成分を覗いてどれも同様になるか?

Oxygen fugacities of extrasolar rocks: Evidence for an Earth-like geochemistry of exoplanets
Alexandra E. Doyle1,*, Edward D. Young1,*, Beth Klein2, Ben Zuckerman2, Hilke E. Schlichting1,2,3
See all authors and affiliations Science 18 Oct 2019: Vol. 366, Issue 6463, pp. 356-359 DOI: 10.1126/science.aax3901