Nature Astronomy, Published online: 14 November 2024; doi:10.1038/s41550-024-02413-6

Many rocky exoplanets are likely to be basaltic. Now, models of laboratory emission spectra of basaltic rocks suggest that JWST and future observatories could detect specific mineral and chemical signatures on these exoplanets. When present at high abundances, minerals indicative of rock–water interactions are particularly visible in modelled planetary flux spectra.

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