The sun's surface churns, roils, boils away, stirring up 6000-degree heat bubbles the size of Pennsylvania. When it is hot I sweat alot. When I sweat I feel the intense of heat. Heat give off light. Light give off energy.
Energy is give off of electricity.
Electricity give off shot. Shot and then you get dead. In about five billion years it will start to expand, swell to become a red giant 166 times its present size, an inflatable hot air atomic oven which will radiate hugely increased heat. The ice caps on Earth will melt, the oceans will evaporate, the deserts prevail. Venus will sizzle and Mercury will be cooked to a crisp.