This is episode 60 of the Urban Astronomer podcast! Is that a milestone? Sure, but we'll save the party hats for episode 75. Today we'll just get on with the job at hand, and bring you a science explainy bit. Today's question: How can astronomers be so certain about what things in space are made...

This is the 5th episode of season 3 of the Urban Astronomer Podcast. Today we feature an interview we recorded earlier this year, before we went into pandemic lockdown, featuring Dr Imogen Whittam. Imogen studied for her PhD in the Cavendish Astrophysics group at the University of Cambridge under...