ESO DOI Service

• De Simone, Marta [European Southern Observatory (ESO)]
• de la Villarmois, Elizabeth Artur [European Southern Observatory (ESO)]
• Bianchi, Eleonora [INAF–Arcetri Astrophysical Observatory, Florence, Italy]
• Nazari, Pooneh [European Southern Observatory (ESO)]
• Redaelli, Elena [European Southern Observatory (ESO)]

Understanding the chemical composition of young prestellar and protostellar systems is key to unveiling the origin of planetary systems. In recent years, high-sensitivity observations at different wavelengths have revealed unexpected molecular complexity in cold cores, discs, and forming planetary systems. This workshop brought together about 90 researchers working on interstellar chemistry, protostellar evolution, disc chemistry and exoplanetary atmospheres to discuss the chemical evolution from clouds to planets. Key goals included identifying robust molecular tracers, understanding chemical inheritance, and bridging observations with laboratory and theoretical work. Particular focus was given to the synergy between the planet formation communities and those studying planetary atmospheres, highlighting the need for a shared language and cross-disciplinary collaboration. The programme featured invited reviews, contributed talks and poster sessions, along with breakout discussions and open question sessions that encouraged interactive and inclusive exchanges. These discussions emphasised the importance of combining chemical models with advanced observations from current and future facilities such as the Atacama Large Millimeter/submillimeter Array (ALMA), the ALMA Wideband Sensitivity Upgrade, the James Webb Space Telescope (JWST), the Square Kilometre Array Observatory, the Next Generation Very Large Array, and ESO’s Extremely Large Telescope. The workshop successfully set the stage for future collaborations, paving the way toward a unified understanding of the chemical processes that shape planetary systems.