April 2021 – Dr Chris Pearson, ARIEL and ALIEN Worlds: Enabling planetary science across light-years

Less than 30 years ago the only planets known to exist were those found within our own Solar System. From the first confirmed discovery in 1992 – of a pair of exotic planets orbiting around a dead star – the field of exoplanetary science has undergone nothing short of a revolution. Currently, we stand at a staggering 4000+ confirmed discoveries of planets outside our Solar System. What we have found is that, as usual, our Universe is more diverse than we could possibly imagine, throwing up a menagerie of weird and wonderful planets such as Jupiter sized worlds orbiting ridiculously close to their parent stars, worlds made of ice, lave, and even diamond, to rogue planets drifting alone in the vastness of space. With such a treasure trove of discovery, the next logical step is to characterise the properties of these systems. We are at the dawn of a new age in exoplanet research where for the first time large samples of 1000+ exoplanets are not only being detected but also characterised by analysing the composition of their atmospheres. The European Space Agency’s ARIEL mission, due for launch in 2028, will become the leading facility in this characterisation process.

Dr Chris PearsomMy PhD was in “Galaxy Evolution and Cosmology” with Prof. Michael Rowan-Robinson Imperial College, London. I have worked on cosmological galaxy surveys at infrared wavelengths for both ground based telesco

pes and space-borne missions. I worked for 7 years in Japan on the AKARI space telescope before moving to the UK to RAL Space to work on the SPIRE instrument on the Herschel Space Observatory where I led the team that produced all the nice maps from SPIRE. I now work on the ARIEL mission searching for exoplanets and the Square Kilometre Array radio telescope, the largest scientific facility ever to be built.