Didier Queloz is a professor of physics at the University of Cambridge’s Cavendish Laboratory and professor of astronomy at ETH Zurich and director of the ETH Centre for Origin and Prevalence of Life. He is one of the originators of the “exoplanet revolution” in astrophysics. In 1995, as part of his PhD, his team announced the first discovery of a giant planet orbiting another star, outside the solar system, a discovery which led him and his colleague Micheal Mayor to obtain the Nobel Prize in Physics. This seminal discovery spawned a revolution in astronomy and kickstarted the research field of exoplanet systems. Over the next 25 years, Didier Queloz’s main scientific contributions have essentially focused on expanding the detection and measurement capabilities of these systems to retrieve information on their physical structure.