[AndrewC]

You provided no answer the first time.

Again, you didn't like my answer. I provided an answer you did not understand or did not like, take your choice. Stars are nuclear reactors. And Gabon is believed to have had a fission reactor 2 billion years ago.

[Doctor Stochastic]

What's not to like? You didn't answer the queston then. The third time, you did.

Actually stars don't have a cooling system other than radiation and convection. However, you're right about the reactor in Gabon (or at least near there). There are others. I think the guys who designed Chernobyl could have learned from the Gabonese design. Maybe Hans Blix could have too (he didn't help Chernobyl much.)