International science advisors: step up global action to halt biodiversity decline

Four telescopes that must maintain a stable focus on extremely faint galaxies for an exceptionally long time, and detectors that remain at a constant temperature of around –130 degrees Celsius throughout: the ARRAKIHS space telescope has been built to the very limits of what is technically possible. In June 2026, the European Space Agency (ESA) gave the go-ahead for the mission – with a Swiss contribution for which Florian Kehl was responsible until the end of 2025. To ensure that such contributions do not remain isolated cases, in addition to high-quality research, we need structures, streamlined processes and people who can get entire missions off the ground. This is precisely what Kehl is working on today as Director of Space Research Initiatives at ETH Zurich | Space. In an interview with SATW, he explains what makes ARRAKIHS so technically challenging, just how competitive Switzerland really is when it comes to securing leadership roles in European missions, and why, in his view, the search for extraterrestrial life might be on the verge of yielding an answer.

Space-based solar power stations could generate electricity almost round the clock and transmit it to Earth via microwaves. The individual technologies are well developed, but their interaction on a large scale has not yet been tested. Swiss research and industry could also play a part in overcoming the enormous technical and economic hurdles.