How much energy is needed to blow up the sun? How is this connected to the idea of binding energy? Where is all the energy in the universe?

How much energy is needed to blow up the sun? How is this connected to the idea of binding energy? Where is all the energy in the universe?
What do brown dwarfs teach us about stars? What do they teach us about planets? What keeps them warm, and how long do they live?
What does the Drake Equation teach us about extraterrestrial civilizations? What does it NOT teach us? Is it even science?