BBC Sky at Night Magazine
Beyond the Visible
The team find out how astronomers are learning about the Universe by looking beyond visible light. Exploring radio astronomy, the unusual sounds that space missions have captured of the cosmos and the detection of ripples in space-time known as gravitational waves, this episode is about how so much more can be detected by studying the unseen.
Four, 13 September, 10pm (first repeat Four, 17 September, 7:30pm) Check www.bbc.co.uk/skyatnight for more up-to-date information