New Carnegie research demonstrates different magnesium compounds could be abundant inside other planets as compared to Earth. O and Mg are the two most-abundant elements in Earth’s mantle. However, when predicting the chemical compositions of rocky, terrestrial planets outside of our own Solar System, they shouldn’t assume that other rocky planets would have Earth-like mantle mineralogy, according to Carnegie’s Sergey Lobanov, Nicholas Holtgrewe, and Alexander Goncharov.
Eg. elevated oxygen contents have been observed in stars that host rocky planets...
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