Gravitational Waves

17 May, 2007 530 Physics

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?

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  • Jim Al-Khalili 8 episodes
    Professor of Physics at the University of Surrey
  • Carolin Crawford 20 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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Hello (First sentence from this episode) Hello, the rather unpoetically named star SN2006GY is roughly 150 times the size of our sun.