Jacques Crovisier is an astronomer at the Paris-Meudon Observatory, specialising in the radio and infrared observation of comets and the modelling of molecular processes in cometary atmospheres. He is a co-investigator on the future Rosetta mission to comet Wirtanen.
Thérèse Encrenaz is the Director of the Department of Space Research (DESPA) at the Paris-Meudon Observatory. She is a specialist in the remote sensing of planetary atmospheres. She has been involved in several space missions, including the International Halley Watch, and is co-investigator for many future missions, including Rosetta.