According to this
http://en.wikipedia.org/wiki/Solar_core#Energy_transfer
it takes 17000 to 50 million years for photons to transfer from the solar core to its surface ? I cannot really understand the reason.
This would mean when the fusion in the Sun stops (and thus the Sun dies) we won't notice it for a long, long time.
I thought it takes slightly more than 2 seconds (solar radius = 696000 km)....
Any ideas on this ?