How far away is the edge of the Solar System? What even is 'the edge'? How do we know it's there? In this month's episode we take a look at the outer limits of our planetary neighbourhood. Plus: we talk to Keith Hayward of the Royal Aeronautical Society about the Chinese space programme and reveal how to make the most of August's Perseid meteor shower. Our GDPR privacy policy was updated on August 8, 2022. Visit acast.com/privacy for more information.