Question

what is a star? What makes the star give out vast amount of energy​

Answer 1

Star is that celestial body, which contains their own energy(in the form of heat and light).

Source of energy:-

1) Nuclear Fusion(mostly)

2)Nuclear Fission (very few)

and 3) Different types of reacting gases.(in very few but exist).

Answer 2

Answer:

Although it's a star – and our local star at that – our sun doesn't have a generally accepted and unique proper name in English. We English speakers always just call it the sun. You sometimes hear English-speakers use the name Sol for our sun.