We catch up with Imperial mission scientist Chris Carr as the Rosetta spacecraft ends its 10-year mission by crashing into the surface of comet 67P.

On 7 January 2014, the Sun's surface erupted with an unusually large explosion, called coronal mass ejection (CME), with NOAA releasing a significant false alarm geomagnetic storm at Earth. Credit: Dr Neel Savani / Imperial College London

Dr Richard Ghail and Dr Philippa Mason make the case for further exploration of Venus and outline their plans for a new mission. (Extract 3 of 4 from the Imperial College Podcast 3 December 2014)