The Sky at Night

Name: The Sky at Night S27E13 - The Black Hole Weigh-In
Uploaded: 1983-12-11
Description: Black holes are almost certainly the most bizarre objects known. They cannot be seen but they betray their presence by their effects upon more normal stars. Now, for the first time, there has been an opportunity to weigh one of these strange objects. Patrick Moore talks about the latest developments with Dr Michael Penston.