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About

Laetitia Delrez is a prominent observational astronomer specializing in exoplanet detection and characterization, with a particular focus on transiting planets around ultracool dwarf stars. Her most significant contribution centers on the SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) survey, a ground-breaking transit survey designed to identify temperate, Earth-sized exoplanets orbiting small, nearby stars — prime candidates for atmospheric characterization with next-generation facilities such as the James Webb Space Telescope. This landmark 2020 work has already accumulated 105 citations, reflecting its substantial influence on the exoplanet community. Delrez's research sits at the exciting frontier of astrobiology-motivated astronomy, addressing one of the field's most compelling questions: where might we find and study potentially habitable worlds beyond our solar system? By targeting ultracool dwarfs — the smallest, coolest, and most abundant stars in the galaxy — her work dramatically increases the feasibility of detecting and probing Earth-like atmospheres with current technology. Her contributions have helped establish SPECULOOS as a leading international collaboration, making her a key figure in the ongoing search for worlds that may one day reveal signs of life beyond Earth.