Caltech Advances High-Dispersion Coronagraphy to Scan Exoplanets for Biosignatures

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Caltech’s Exoplanet Technology Laboratory, led by Dimitri Mawet and including Ji Wang, is developing high-dispersion coronagraphy that blocks starlight, channels planet light through optical fibers, and uses a high-resolution spectrometer to detect biosignature gas pairs like oxygen and methane on distant exoplanets, while also potentially revealing a planet’s rotation and rough surface features.