This week on the Audio Guide to the Galaxy, we're continuing our space walk. We'll be exploring the 4.2 billion km expanse of the solar system at 3.5 million kilometres a second. So put your walking shoes on, and let's get out of this world

Once again, you can listen to this episode any time. Yep, even day time.

If you missed part one last week, you might like to listen to that first - you'll find it one episode back wherever you're listening to your podcasts.