Chris Riley goes in search of elusive dark matter, and Dr Kathy Sykes talks to Jocelyn Bell-Burnell, the legendary astronomer who discovered pulsars while doing her doctorate. Show more

Kathy Sykes meets the designer of the world's largest telescopes. Chris Riley visits New York to see a two-mile long machine that re-creates the Big Bang. Plus a look at asteroids. Show more

Chris Riley discovers that, rather than being a hazard, black holes may be an essential part of our universe. Meanwhile, Kathy Sykes meets a man who designs prisms for the world's largest telescopes. Show more

Chris Riley travels to NASA's Jet Propulsion Laboratory in California to find out about the extraordinary propulsion systems of the future. Show more

Chris Riley meets the team who have discovered most of the known planets outside our Solar System, while a PhD student talks about spotting stars using the world's most powerful group of telescopes. Show more

Chris Riley investigates the science behind the newest SETI project, while Sir Patrick Moore talks about his lifetime of astronomy. Show more