Published: July 15, 2013, 4:43 p.m.
July 2013's Night Sky podcast - presented by David Ault
In this slightly delayed edition, David takes a look at black holes to discover how it was a mathematician - rather than a physicist or astronomer - who pondered their existence. How would a satellite react around it? How much does it weigh? And what is there to see in the July night sky? All these questions and more are answered here!