Journey to the Centre of the Sun.
"This podcast will take you on a short journey down through the different layers of the Sun, and give a brief outline of how the four forces of nature are at work in the Sun to produce its energy."
365 Days of Astronomy podcast Link.
For more information about the solar interior
Solar Data Analysis Centre - A wonderful site with up to date images of the sun.
The Solar Interior from solar science at NASA at the Marshall Spaceflight Centre, a more in-depth look at some of the topics touched on in the podcast.
And from the environmental research web, an article about the 360 degree picture taken by the STEREO satallite.
Image Courtesy of SOHO/EIT consortium. SOHO is a project of international cooperation between ESA and NASA.")