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BBC Radio 4 is a radio channel that started transmitting on the 30th September 1967. It replaced BBC Home Service.

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In Our Time

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Factual: History

Melvyn Bragg and guests discuss the ideas, people and events that have shaped our world.

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Melvyn Bragg

Carolin Crawford

Don Pollacco

Suzanne Aigrain

Thomas Morris

In Our Time: Exoplanets

Exoplanets

03/10/2013

BBC Radio 4 - In Our Time, Exoplanets

Melvyn Bragg and his guests discuss planets outside our solar system, known as exoplanets.

Melvyn Bragg and guests discuss exoplanets, planets detected outside our solar system.

Melvyn Bragg and his guests discuss exoplanets. Astronomers have speculated about the existence of planets beyond our solar system for centuries. Although strenuous efforts were made to find such planets orbiting distant stars, it was not until the 1990s that instruments became sophisticated enough to detect such remote objects. In 1992 Dale Frail and Aleksander Wolszczan discovered the first confirmed exoplanets: two planets orbiting the pulsar PSR B1257+12. Since then, astronomers have discovered more than 900 exoplanets, and are able to reach increasingly sophisticated conclusions about what they look like - and whether they might be able to support life. Recent data from experiments such as NASA's space telescope Kepler indicates that such planets may be far more common than previously suspected.

With:

Carolin Crawford
Gresham Professor of Astronomy and a member of the Institute of Astronomy at the University of Cambridge

Don Pollacco
Professor of Astronomy at the University of Warwick

Suzanne Aigrain
Lecturer in Astrophysics at the University of Oxford and a Fellow of All Souls College.

Producer: Thomas Morris.

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