An international team, involving scientists from IAS, IRAP, ISMO and LERMA, has shed light on the destruction and reformation of a large quantity of water in the planet-forming disk “d203-506” located at the heart of the Orion Nebula. This discovery was made possible by an original multidisciplinary approach that combines observations from the JWST space telescope and quantum physics calculations. The study, carried out as a part of the PDRs4All¹ Early Release Science (ERS) program and led by Marion Zannese, a PhD student at the Institut d’Astrophysique Spatiale, has been published in Nature Astronomy.