iPlayer Radio What's New?
Image for The Planets

Play now 45 mins

The Planets

Duration:
45 minutes
First broadcast:
Thursday 27 May 2004

Melvyn Bragg and guests discuss our knowledge of the planets in both our and other solar systems. Tucked away in the outer Western Spiral arm of the Milky Way is a middle aged star, with nine, or possibly ten orbiting planets of hugely varying sizes. Roughly ninety-two million miles and third in line from that central star is our own planet Earth, in thrall to our Sun, just one of the several thousand million stars that make up the Galaxy.

Ever since Galileo and Copernicus gave us a scientific model of our own solar system, we have assumed that somewhere amongst the myriad stars there must be other orbiting planets, but it took until 1995 to find one. ‘51 Pegasus A’ was discovered in the Pegasus constellation and was far bigger and far closer to its sun than any of our existing theories could have predicted. Since then 121 new planets have been found. And now it is thought there may be more planets in the skies than there are stars.

What causes a planet to form? How do you track one down? And how likely is there to be another one out there with properties like the Earth’s?

With Paul Murdin, Senior Fellow at the Institute of Astronomy in Cambridge; Hugh Jones, planet hunter and Reader in Astrophysics at Liverpool John Moores University; Carolin Crawford, Royal Society Research Fellow at the Institute of Astronomy in Cambridge.

Credits

Presenter
Melvyn BRAGG
Producer
Charlie TAYLOR

Broadcasts

Featured in...

In Our Time Downloads

melvyn-bragg.jpg

Every episode of In Our Time - available to download to listen to when & where you want.

Free downloads

  1. Image for In Our Time Archive: Culture

    In Our Time Archive: Culture

    Melvyn Bragg and his guests discuss the history of ideas as it applies to culture - from literature…

  2. Image for In Our Time Archive: History

    In Our Time Archive: History

    Melvyn Bragg and his guests discuss the people, conflicts and events that have shaped the world.

  3. Image for In Our Time Archive: Philosophy

    In Our Time Archive: Philosophy

    Melvyn Bragg and his guests discuss the history of philosophy - from ancient Greek thinkers to the…

  4. Image for In Our Time Archive: Religion

    In Our Time Archive: Religion

    Melvyn Bragg and his guests discuss the history of religious ideas - from the faith systems of…

  5. Image for In Our Time Archive: Science

    In Our Time Archive: Science

    Melvyn Bragg and his guests discuss the history of ideas and the evolution of the sciences - from…

  6. Image for In Our Time With Melvyn Bragg

    In Our Time With Melvyn Bragg

    Melvyn Bragg and his guests discuss the history of ideas - including topics drawn from philosophy,…

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Added. Check out your playlist Dismiss