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Here are some examples of heat energy. 1  The biggest example of heat energy in our solar system is the sun itself. 2  The sun radiates heat to warm us up one the planet earth. 3  When the burner of a stovetop is very hot, it is a source of heat energy.
This energy is radiated first to the Sun's surface, where temperatures are still as high as 6,000 degrees Celsius, and then into the solar system in the form of electromagnetic radiation. Solar radiation is the main source of energy that heats the surface of the Earth.