Witness

On 9 January 1992, astronomers Alex Wolszczan and Dale Frail announced they had discovered the first two exoplanets, or planets outside our solar system, while working at the Arecibo Observatory in Puerto Rico. The two planets orbit a pulsar, a neutron star, 2,300 light-years away, in the constellation Virgo. We now know of the existence of nearly 6,000 exoplanets, but Poltergeist and Phobetor were the first to be confirmed. Rachel Naylor speaks to Alex Wolszczan.Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more. Recent episodes explore everything from football in Brazil, the history of the ‘Indian Titanic’ and the invention of air fryers, to Public Enemy’s Fight The Power, subway art and the political cris