Gravitational Waves

Melvyn Bragg and guests discuss mysterious phenomena called Gravitational Waves in contemporary physics. The rather un-poetically named star SN 2006gy is roughly 150 times the size of our sun. Last week it went supernova, creating the brightest stellar explosion ever recorded. But among the vast swathes of dust, gas and visible matter ejected into space, perhaps the most significant consequences were invisible - emanating out from the star like the ripples from a pebble thrown into a pond. They are called Gravitational Waves, predicted by Einstein and much discussed since, their existence has never actually been proved but now scientists may be on the verge of measuring them directly. To do so would give us a whole new way of seeing the cosmos. But what are gravitational waves, why are scientists trying to measure them and, if they succeed, what would a gravitational picture of the universe look like?

→ Play on BBC Sounds website

Guests

• Jim Al-Khalili 8 episodes
  Professor of Physics at the University of Surrey
• Carolin Crawford 19 episodes
  Royal Society Research Fellow at the Institute of Astronomy, Cambridge
• Sheila Rowan 2 episodes
  Professor in Experimental Physics in the Department of Physics and Astronomy at the University of Glasgow

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Programme ID: b007h8gv

Episode page: bbc.co.uk/programmes/b007h8gv

Auto-category: 530 (Physics and Astronomy)

Hello (First sentence from this episode)

Hello, the rather unpoetically named star SN2006GY is roughly 150 times the size of our sun.