Der Perlentaucher unter den Buchläden Eichendorff21

**Pierre Léna** is emeritus professor of physics and astrophysics at the university of Paris Diderot-Paris 7 and researcher at the Observatoire de Paris. **Daniel Rouan** is a director of research of the Centre National de la Recherche Scientific (CNRS) at the Observatoire de Paris. He specialises in very high resolution imaging and develops new optical concepts for observation of exoplanets. **François Lebrun** is an engineer at the Commissariat à l'énergie atomique. He has participated in major space astronomy missions, notably INTEGRAL. YOU COULD SAY ... an engineer at the French atomic energy authority (CEA). **François Mignard** is a director of research of the Centre National de la Recherche Scientific (CNRS) at the Observatoire de la Côte d'Azur. He specialises in astrometry and has played a major role in the future European space mission GAIA. **Didier Pelat** is an astronomer at the Observatoire de Paris. He teaches signal and image processing and has developed powerful mathematical tools for astronomical data processing.