have been working on this for yonks.
This is a good place to start:
en.wikipedia.org/wiki/Stellar_structure
Basically, it's a load of extrapolation about whats going inside the sun - it's occassionally probed with x-rays etc:
soho.esac.esa.int/
/serious nerd answer over
(, Mon 1 Dec 2008, 11:59, Reply)