Ordinary Meeting - February 2022

Ariel Space Mission
Ariel Space Mission
ESA/STFC RAL Space/UCL/Europlanet-Science Office
Start Date
End Date

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‘RAS Eddington Lecture’

A chemical survey of planets in our galaxy - Professor Giovanna Tinetti (UCL)

The Earth is special to us: it’s our home. But is it really special as a planet? Every star we can see in the night sky is likely to be orbited by planets, so that there probably are a thousand billion planets in our galaxy alone. Since the discovery of the first “exoplanet” about thirty years ago, about 5000 exoplanets have been discovered in distant solar systems, with many surprising planets and planetary systems, often very different from our own. A suite of ground-based and space telescopes are currently in operation or will be launched within this decade to discover more exciting planets and unveil their nature: what are they made of? How did they form? What’s the weather like there? Are they habitable?

The Ariel space telescope, to be launched in 2029 as part of the ESA Science Programme, is the first mission dedicated to the determination of the chemical composition of hundreds of exoplanets, enabling planetary science far beyond the boundaries of the Solar System. Finding out why are these new worlds as they are and what is the Earth’s place in our galaxy and –ultimately– in the universe, is one of the key challenges of modern astrophysics. The Ariel mission will bring a fundamental contribution to addressing this challenge, as I will illustrate in my talk.

Professor Giovanna Tinetti is the Head of Group of Astrophysics at University College London and Director of the UCL Centre for Space Exo-chemistry Data at Harwell. She is the Principal Investigator of Ariel, the European Space Agency's science mission to be launched in 2029. She is also co-founder of Blue Skies Space Ltd, which aims at creating new opportunities for science space satellites.

Awarded a PhD in Theoretical Physics from the University of Turin in Italy in 2003, Giovanna Tinetti has continued her academic career as NASA Astrobiology Institute Fellow at Caltech/JPL and then as European Space Agency Fellow in Paris, before moving to UCL in 2007 as STFC Aurora and then Royal Society URF Fellow. She has authored / co-authored over 200 research papers and has delivered over 250 talks, seminars and public lectures internationally.


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