system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
what makes the Sun bright ?


assistant
The sun is a huge massive sphere of gas and it is powered by the energy released by turning hydrogen to helium at its core. This process is called nuclear fusion reaction. Nuclear fusion involves two or more nuclei combining together to form one or more different atomic nuclei. Nuclear fusion releases termendous amount of energy in the form of light and heat.