The search for exoplanets with Jonathan Tennyson | The Royal Institution
We now know that almost every star in the galaxy hosts a planetary system —over 6,000 exoplanets have been confirmed so far, and counting. But knowing
they exist is just the beginning. What are these worlds actually made of?
Could any of them support life?
This lecture was filmed on 27 February 2026.
In this Royal Institution Discourse, Professor Jonathan Tennyson, Massey
Professor of Physics at UCL and Fellow of the Royal Society, explores how
cutting-edge advances in spectroscopy are transforming our understanding of
exoplanet composition.
Jonathan examines two of the biggest challenges facing researchers today:
the extreme temperatures on some exoplanets that produce extraordinarily
complex spectral signatures, and the fact that for most exoplanets, we
can't even see them directly. He reveals the techniques scientists use to
overcome these obstacles, combining spectral observation with quantum
mechanical methods to decode the chemical fingerprints of distant worlds.
This lecture was recorded at the Royal Institution in London as part of
the prestigious Friday Evening Discourse series, one of the oldest science
lecture series in the world, dating back to 1825. It was delivered in
celebration of UCL200.
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