In 1995, together with his doctoral advisor Michel Mayor, Didier Queloz caused an international furore. At the University of Geneva, the two Swiss astronomers discovered the first exoplanet orbiting a solar-type star. The duo garnered the 2019 Nobel Prize in Physics for their groundbreaking discovery.
In recent years, Queloz, who not only holds a chair at the University of Geneva but has also been a professor at the University of Cambridge’s Cavendish Laboratory since 2013, has participated in the detection of numerous other planets. At the same time, the focus of his research is increasingly on searching for planets that are potentially habitable, hoping thereby to find greater insight into how life on Earth may have originated.
This summer, Didier Queloz is leaving his alma mater to take up his post as Professor of Physics at ETH Zurich where, as designated director, he will help establish the new ETH Center for the Origin and Prevalence of Life with the involvement of professors from five departments.
Mr. Queloz, what made you decide to accept a professorship in Zurich?
Didier Queloz: The reason for my move is very simple: ETH Zurich is working on an absolutely fantastic project. We intend to explore a new area of research that focuses on the origin of life. The timing is perfect.
Why’s that?
In recent years, rapid progress relevant to this topic has been made in various research fields. In my own area, astronomy, we have discovered thousands of new planets, including smaller stellar objects, that could support life. We were able to detect atmospheres on a number of planets and now know a fair bit about the composition of these celestial bodies. The second key field is researching our own planetary system, particularly the exploration of Mars. Mars is enormously important for our work because its development over the first billion years was very similar to that of Earth. Not much has happened on Mars since then, while plate tectonics have caused dramatic changes in the surface of Earth. Mars shows us what Earth may have looked like some 3.5 billion years ago.
Why is that crucial in unravelling the origin of life?
It’s important because that is when it is assumed that life began on Earth – perhaps on Mars, too. Moreover, other objects in our solar system also warrant a closer look: Venus, for instance, or Jupiter’s moons. These objects reveal the potential composition of the different exoplanets.
But don’t we also need biologists and chemists if we want to investigate the origin of life?
Yes, their expertise is also vital. In the last few years, considerable strides have been made in biochemistry and molecular chemistry as well. Today, biochemists can use computers to calculate completely new compounds and are able to simulate networks of chemical reactions. These networks probably served as catalysts for the origins of life. Geoscientists, too, are indispensable as they can tell us what conditions were like on Earth when life evolved.
And the new centre will bring all these different fields together?
Yes. Advances in the aforementioned fields have completely changed the status quo. It is imperative that these disciplines now join forces in order for us to take the next step. My experience in Cambridge shows that interdisciplinary dialogue helps bring forth new ideas. A new community is currently forming at large universities such as Harvard and Caltech, as well as Cambridge. Researchers from very different fields aim to work together in solving a fundamental problem. It’s still unclear how far we’ll get but we predict that we will be able to make great progress over the next few years.
