How can we detect massive objects in space when we can't see them by light?

On 14 September 2015, scientists opened a new window to observing the Universe when, for the first time, they directly detected gravitational waves, rippled out through spacetime from the merger of two black holes. 

In this episode, astronomer Tessa Baker explores how Einstein’s theory of gravity predicted the existence of gravitational waves, how delicate experiments eventually confirmed their existence, and how we can

This talk was recorded from our theatre at the Royal Institution on 19 May 2023.

Please leave this episode a rating and a review to let us know what you think.

Produced by: Sarah Dick

Music by: Joseph Sandy