Question

What is the source of a star's energy?

Answer 1

Stars create energy in their central regions by nuclear reactions. Hydrogen nuclei come together to form helium nuclei. This process is called fusion and can only take place because of the huge pressures and temperatures of over ten million degrees Celsius at the centres of stars.

Answer 2

all stars are huge balls of hydrogen and helium gases. in a star, hydrogen gets converted into helium. in this reaction, a large Amount of energy is liberated